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  1. Article ; Online: Triangle Singularity as the Origin of the a_{1}(1420).

    Alexeev, G D / Alexeev, M G / Amoroso, A / Andrieux, V / Anosov, V / Antoshkin, A / Augsten, K / Augustyniak, W / Azevedo, C D R / Badełek, B / Balestra, F / Ball, M / Barth, J / Beck, R / Bedfer, Y / Berenguer Antequera, J / Bernhard, J / Bodlak, M / Bradamante, F /
    Bressan, A / Burtsev, V E / Chang, W-C / Chatterjee, C / Chiosso, M / Chumakov, A G / Chung, S-U / Cicuttin, A / Correia, P M M / Crespo, M L / D'Ago, D / Dalla Torre, S / Dasgupta, S S / Dasgupta, S / Denisenko, I / Denisov, O Yu / Donskov, S V / Doshita, N / Dreisbach, Ch / Dünnweber, W / Dusaev, R R / Efremov, A / Eversheim, P D / Faccioli, P / Faessler, M / Finger, M / Fischer, H / Franco, C / Friedrich, J M / Frolov, V / Gautheron, F / Gavrichtchouk, O P / Gerassimov, S / Giarra, J / Gnesi, I / Gorzellik, M / Grasso, A / Gridin, A / Grosse Perdekamp, M / Grube, B / Guskov, A / von Harrach, D / Heitz, R / Herrmann, F / Horikawa, N / d'Hose, N / Hsieh, C-Y / Huber, S / Ishimoto, S / Ivanov, A / Iwata, T / Jandek, M / Jary, V / Joosten, R / Jörg, P / Kabuß, E / Kaspar, F / Kerbizi, A / Ketzer, B / Khaustov, G V / Khokhlov, Yu A / Kisselev, Yu / Klein, F / Koivuniemi, J H / Kolosov, V N / Kondo Horikawa, K / Konorov, I / Konstantinov, V F / Kotzinian, A M / Kouznetsov, O M / Koval, A / Kral, Z / Krinner, F / Kulinich, Y / Kunne, F / Kurek, K / Kurjata, R P / Kveton, A / Lavickova, K / Levorato, S / Lian, Y-S / Lichtenstadt, J / Lin, P-J / Longo, R / Lyubovitskij, V E / Maggiora, A / Magnon, A / Makins, N / Makke, N / Mallot, G K / Maltsev, A / Mamon, S A / Marianski, B / Martin, A / Marzec, J / Matoušek, J / Matsuda, T / Mattson, G / Meshcheryakov, G V / Meyer, M / Meyer, W / Mikhailov, Yu V / Mikhasenko, M / Mitrofanov, E / Mitrofanov, N / Miyachi, Y / Moretti, A / Nagaytsev, A / Naim, C / Neyret, D / Nový, J / Nowak, W-D / Nukazuka, G / Nunes, A S / Olshevsky, A G / Ostrick, M / Panzieri, D / Parsamyan, B / Paul, S / Pekeler, H / Peng, J-C / Pešek, M / Peshekhonov, D V / Pešková, M / Pierre, N / Platchkov, S / Pochodzalla, J / Polyakov, V A / Pretz, J / Quaresma, M / Quintans, C / Reicherz, G / Riedl, C / Rudnicki, T / Ryabchikov, D I / Rybnikov, A / Rychter, A / Samoylenko, V D / Sandacz, A / Sarkar, S / Savin, I A / Sbrizzai, G / Schmieden, H / Selyunin, A / Sinha, L / Slunecka, M / Smolik, J / Srnka, A / Steffen, D / Stolarski, M / Subrt, O / Sulc, M / Suzuki, H / Sznajder, P / Tessaro, S / Tessarotto, F / Thiel, A / Tomsa, J / Tosello, F / Townsend, A / Tskhay, V / Uhl, S / Vasilishin, B I / Vauth, A / Veit, B M / Veloso, J / Ventura, B / Vidon, A / Virius, M / Wagner, M / Wallner, S / Zaremba, K / Zavada, P / Zavertyaev, M / Zemko, M / Zemlyanichkina, E / Zhao, Y / Ziembicki, M

    Physical review letters

    2021  Volume 127, Issue 8, Page(s) 82501

    Abstract: The COMPASS Collaboration experiment recently discovered a new isovector resonancelike signal with axial-vector quantum numbers, the a_{1}(1420), decaying to f_{0}(980)π. With a mass too close to and a width smaller than the axial-vector ground state a_{ ... ...

    Abstract The COMPASS Collaboration experiment recently discovered a new isovector resonancelike signal with axial-vector quantum numbers, the a_{1}(1420), decaying to f_{0}(980)π. With a mass too close to and a width smaller than the axial-vector ground state a_{1}(1260), it was immediately interpreted as a new light exotic meson, similar to the X, Y, Z states in the hidden-charm sector. We show that a resonancelike signal fully matching the experimental data is produced by the decay of the a_{1}(1260) resonance into K^{*}(→Kπ)K[over ¯] and subsequent rescattering through a triangle singularity into the coupled f_{0}(980)π channel. The amplitude for this process is calculated using a new approach based on dispersion relations. The triangle-singularity model is fitted to the partial-wave data of the COMPASS experiment. Despite having fewer parameters, this fit shows a slightly better quality than the one using a resonance hypothesis and thus eliminates the need for an additional resonance in order to describe the data. We thereby demonstrate for the first time in the light-meson sector that a resonancelike structure in the experimental data can be described by rescattering through a triangle singularity, providing evidence for a genuine three-body effect.
    Language English
    Publishing date 2021-09-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.127.082501
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Measurement of the charged-pion polarizability.

    Adolph, C / Akhunzyanov, R / Alexeev, M G / Alexeev, G D / Amoroso, A / Andrieux, V / Anosov, V / Austregesilo, A / Badełek, B / Balestra, F / Barth, J / Baum, G / Beck, R / Bedfer, Y / Berlin, A / Bernhard, J / Bicker, K / Bieling, J / Birsa, R /
    Bisplinghoff, J / Bodlak, M / Boer, M / Bordalo, P / Bradamante, F / Braun, C / Bressan, A / Büchele, M / Burtin, E / Capozza, L / Chiosso, M / Chung, S U / Cicuttin, A / Colantoni, M / Crespo, M L / Curiel, Q / Dalla Torre, S / Dasgupta, S S / Dasgupta, S / Denisov, O Yu / Dinkelbach, A M / Donskov, S V / Doshita, N / Duic, V / Dünnweber, W / Dziewiecki, M / Efremov, A / Elia, C / Eversheim, P D / Eyrich, W / Faessler, M / Ferrero, A / Filin, A / Finger, M / Fischer, H / Franco, C / du Fresne von Hohenesche, N / Friedrich, J M / Frolov, V / Gautheron, F / Gavrichtchouk, O P / Gerassimov, S / Geyer, R / Gnesi, I / Gobbo, B / Goertz, S / Gorzellik, M / Grabmüller, S / Grasso, A / Grube, B / Grussenmeyer, T / Guskov, A / Guthörl, T / Haas, F / von Harrach, D / Hahne, D / Hashimoto, R / Heinsius, F H / Herrmann, F / Hinterberger, F / Höppner, Ch / Horikawa, N / d'Hose, N / Huber, S / Ishimoto, S / Ivanov, A / Ivanshin, Yu / Iwata, T / Jahn, R / Jary, V / Jasinski, P / Jörg, P / Joosten, R / Kabuss, E / Ketzer, B / Khaustov, G V / Khokhlov, Yu A / Kisselev, Yu / Klein, F / Klimaszewski, K / Koivuniemi, J H / Kolosov, V N / Kondo, K / Königsmann, K / Konorov, I / Konstantinov, V F / Kotzinian, A M / Kouznetsov, O / Krämer, M / Kroumchtein, Z V / Kuchinski, N / Kuhn, R / Kunne, F / Kurek, K / Kurjata, R P / Lednev, A A / Lehmann, A / Levillain, M / Levorato, S / Lichtenstadt, J / Maggiora, A / Magnon, A / Makke, N / Mallot, G K / Marchand, C / Martin, A / Marzec, J / Matousek, J / Matsuda, H / Matsuda, T / Meshcheryakov, G / Meyer, W / Michigami, T / Mikhailov, Yu V / Miyachi, Y / Moinester, M A / Nagaytsev, A / Nagel, T / Nerling, F / Neubert, S / Neyret, D / Nikolaenko, V I / Novy, J / Nowak, W-D / Nunes, A S / Olshevsky, A G / Orlov, I / Ostrick, M / Panknin, R / Panzieri, D / Parsamyan, B / Paul, S / Peshekhonov, D / Platchkov, S / Pochodzalla, J / Polyakov, V A / Pretz, J / Quaresma, M / Quintans, C / Ramos, S / Regali, C / Reicherz, G / Rocco, E / Rossiyskaya, N S / Ryabchikov, D I / Rychter, A / Samoylenko, V D / Sandacz, A / Sarkar, S / Savin, I A / Sbrizzai, G / Schiavon, P / Schill, C / Schlüter, T / Schmidt, K / Schmieden, H / Schönning, K / Schopferer, S / Schott, M / Shevchenko, O Yu / Silva, L / Sinha, L / Sirtl, S / Slunecka, M / Sosio, S / Sozzi, F / Srnka, A / Steiger, L / Stolarski, M / Sulc, M / Sulej, R / Suzuki, H / Szabelski, A / Szameitat, T / Sznajder, P / Takekawa, S / ter Wolbeek, J / Tessaro, S / Tessarotto, F / Thibaud, F / Uhl, S / Uman, I / Virius, M / Wang, L / Weisrock, T / Wilfert, M / Windmolders, R / Wollny, H / Zaremba, K / Zavertyaev, M / Zemlyanichkina, E / Ziembicki, M / Zink, A

    Physical review letters

    2015  Volume 114, Issue 6, Page(s) 62002

    Abstract: The COMPASS collaboration at CERN has investigated pion Compton scattering, π(-)γ→π(-)γ, at center-of-mass energy below 3.5 pion masses. The process is embedded in the reaction π(-)Ni→π(-)γNi, which is initiated by 190 GeV pions impinging on a nickel ... ...

    Abstract The COMPASS collaboration at CERN has investigated pion Compton scattering, π(-)γ→π(-)γ, at center-of-mass energy below 3.5 pion masses. The process is embedded in the reaction π(-)Ni→π(-)γNi, which is initiated by 190 GeV pions impinging on a nickel target. The exchange of quasireal photons is selected by isolating the sharp Coulomb peak observed at smallest momentum transfers, Q(2)<0.0015  (GeV/c)(2). From a sample of 63,000 events, the pion electric polarizability is determined to be α(π)=(2.0±0.6(stat)±0.7(syst))×10(-4)  fm(3) under the assumption α(π)=-β(π), which relates the electric and magnetic dipole polarizabilities. It is the most precise measurement of this fundamental low-energy parameter of strong interaction that has been addressed since long by various methods with conflicting outcomes. While this result is in tension with previous dedicated measurements, it is found in agreement with the expectation from chiral perturbation theory. An additional measurement replacing pions by muons, for which the cross-section behavior is unambiguously known, was performed for an independent estimate of the systematic uncertainty.
    Language English
    Publishing date 2015-02-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.114.062002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Observation of a New Narrow Axial-Vector Meson a1(1420).

    Adolph, C / Akhunzyanov, R / Alexeev, M G / Alexeev, G D / Amoroso, A / Andrieux, V / Anosov, V / Austregesilo, A / Azevedo, C / Badełek, B / Balestra, F / Barth, J / Beck, R / Bedfer, Y / Bernhard, J / Bicker, K / Bielert, E R / Birsa, R / Bisplinghoff, J /
    Bodlak, M / Boer, M / Bordalo, P / Bradamante, F / Braun, C / Bressan, A / Büchele, M / Burtin, E / Chang, W-C / Chiosso, M / Choi, I / Chung, S U / Cicuttin, A / Crespo, M L / Curiel, Q / Dalla Torre, S / Dasgupta, S S / Dasgupta, S / Denisov, O Yu / Dhara, L / Donskov, S V / Doshita, N / Dünnweber, W / Duic, V / Dziewiecki, M / Efremov, A / Eversheim, P D / Eyrich, W / Faessler, M / Ferrero, A / Finger, M / Fischer, H / Franco, C / du Fresne von Hohenesche, N / Friedrich, J M / Frolov, V / Gautheron, F / Gavrichtchouk, O P / Gerassimov, S / Gnesi, I / Gorzellik, M / Grabmüller, S / Grasso, A / Grosse-Perdekamp, M / Grube, B / Grussenmeyer, T / Guskov, A / Haas, F / Hahne, D / von Harrach, D / Hashimoto, R / Heinsius, F H / Herrmann, F / Hinterberger, F / Horikawa, N / d'Hose, N / Hsieh, C-Yu / Huber, S / Ishimoto, S / Ivanov, A / Ivanshin, Yu / Iwata, T / Jahn, R / Jary, V / Jörg, P / Joosten, R / Kabuß, E / Ketzer, B / Khaustov, G V / Khokhlov, Yu A / Kisselev, Yu / Klein, F / Klimaszewski, K / Koivuniemi, J H / Kolosov, V N / Kondo, K / Königsmann, K / Konorov, I / Konstantinov, V F / Kotzinian, A M / Kouznetsov, O / Krämer, M / Kremser, P / Krinner, F / Kroumchtein, Z V / Kuchinski, N / Kunne, F / Kurek, K / Kurjata, R P / Lednev, A A / Lehmann, A / Levillain, M / Levorato, S / Lichtenstadt, J / Maggiora, A / Magnon, A / Makins, N / Makke, N / Mallot, G K / Marchand, C / Martin, A / Marzec, J / Matousek, J / Matsuda, H / Matsuda, T / Meshcheryakov, G / Meyer, W / Michigami, T / Mikhailov, Yu V / Miyachi, Y / Nagaytsev, A / Nagel, T / Nerling, F / Neyret, D / Nikolaenko, V I / Novy, J / Nowak, W-D / Nunes, A S / Olshevsky, A G / Orlov, I / Ostrick, M / Panzieri, D / Parsamyan, B / Paul, S / Peng, J-C / Pereira, F / Pesek, M / Peshekhonov, D V / Platchkov, S / Pochodzalla, J / Polyakov, V A / Pretz, J / Quaresma, M / Quintans, C / Ramos, S / Regali, C / Reicherz, G / Riedl, C / Rocco, E / Rossiyskaya, N S / Ryabchikov, D I / Rychter, A / Samoylenko, V D / Sandacz, A / Santos, C / Sarkar, S / Savin, I A / Sbrizzai, G / Schiavon, P / Schmeing, S / Schmidt, K / Schmieden, H / Schönning, K / Schopferer, S / Schlüter, T / Selyunin, A / Shevchenko, O Yu / Silva, L / Sinha, L / Sirtl, S / Slunecka, M / Sozzi, F / Srnka, A / Stolarski, M / Sulc, M / Suzuki, H / Szabelski, A / Szameitat, T / Sznajder, P / Takekawa, S / Ter Wolbeek, J / Tessaro, S / Tessarotto, F / Thibaud, F / Tskhay, V / Uhl, S / Veloso, J / Virius, M / Wallner, S / Weisrock, T / Wilfert, M / Zaremba, K / Zavertyaev, M / Zemlyanichkina, E / Ziembicki, M / Zink, A

    Physical review letters

    2015  Volume 115, Issue 8, Page(s) 82001

    Abstract: The COMPASS Collaboration at CERN has measured diffractive dissociation of 190  GeV/c pions into the π(-)π(-)π(+) final state using a stationary hydrogen target. A partial-wave analysis (PWA) was performed in bins of 3π mass and four-momentum transfer ... ...

    Abstract The COMPASS Collaboration at CERN has measured diffractive dissociation of 190  GeV/c pions into the π(-)π(-)π(+) final state using a stationary hydrogen target. A partial-wave analysis (PWA) was performed in bins of 3π mass and four-momentum transfer using the isobar model and the so far largest PWA model consisting of 88 waves. A narrow peak is observed in the f0(980)π channel with spin, parity and C-parity quantum numbers J(PC)=1(++). We present a resonance-model study of a subset of the spin-density matrix selecting 3π states with J(PC)=2(++) and 4(++) decaying into ρ(770)π and with J(PC)=1(++) decaying into f0(980)π. We identify a new a1 meson with mass (1414(-13)(+15))  MeV/c2 and width (153(-23)(+8))  MeV/c2. Within the final states investigated in our analysis, we observe the new a1(1420) decaying only into f0(980)π, suggesting its exotic nature.
    Language English
    Publishing date 2015-08-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.115.082001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: First Measurement of Transverse-Spin-Dependent Azimuthal Asymmetries in the Drell-Yan Process.

    Aghasyan, M / Akhunzyanov, R / Alexeev, G D / Alexeev, M G / Amoroso, A / Andrieux, V / Anfimov, N V / Anosov, V / Antoshkin, A / Augsten, K / Augustyniak, W / Austregesilo, A / Azevedo, C D R / Badełek, B / Balestra, F / Ball, M / Barth, J / Beck, R / Bedfer, Y /
    Bernhard, J / Bicker, K / Bielert, E R / Birsa, R / Bodlak, M / Bordalo, P / Bradamante, F / Bressan, A / Büchele, M / Chang, W-C / Chatterjee, C / Chiosso, M / Choi, I / Chung, S-U / Cicuttin, A / Crespo, M L / Dalla Torre, S / Dasgupta, S S / Dasgupta, S / Denisov, O Yu / Dhara, L / Donskov, S V / Doshita, N / Dreisbach, Ch / Dünnweber, W / Dziewiecki, M / Efremov, A / Eversheim, P D / Faessler, M / Ferrero, A / Finger, M / Fischer, H / Franco, C / du Fresne von Hohenesche, N / Friedrich, J M / Frolov, V / Fuchey, E / Gautheron, F / Gavrichtchouk, O P / Gerassimov, S / Giarra, J / Giordano, F / Gnesi, I / Gorzellik, M / Grasso, A / Grosse Perdekamp, M / Grube, B / Grussenmeyer, T / Guskov, A / Hahne, D / Hamar, G / von Harrach, D / Heinsius, F H / Heitz, R / Herrmann, F / Horikawa, N / d'Hose, N / Hsieh, C-Y / Huber, S / Ishimoto, S / Ivanov, A / Ivanshin, Yu / Iwata, T / Jary, V / Joosten, R / Jörg, P / Kabuß, E / Kerbizi, A / Ketzer, B / Khaustov, G V / Khokhlov, Yu A / Kisselev, Yu / Klein, F / Koivuniemi, J H / Kolosov, V N / Kondo, K / Königsmann, K / Konorov, I / Konstantinov, V F / Kotzinian, A M / Kouznetsov, O M / Kral, Z / Krämer, M / Kremser, P / Krinner, F / Kroumchtein, Z V / Kulinich, Y / Kunne, F / Kurek, K / Kurjata, R P / Kveton, A / Lednev, A A / Levillain, M / Levorato, S / Lian, Y-S / Lichtenstadt, J / Longo, R / Maggiora, A / Magnon, A / Makins, N / Makke, N / Mallot, G K / Marianski, B / Martin, A / Marzec, J / Matoušek, J / Matsuda, H / Matsuda, T / Meshcheryakov, G V / Meyer, M / Meyer, W / Mikhailov, Yu V / Mikhasenko, M / Mitrofanov, E / Mitrofanov, N / Miyachi, Y / Nagaytsev, A / Nerling, F / Neyret, D / Nový, J / Nowak, W-D / Nukazuka, G / Nunes, A S / Olshevsky, A G / Orlov, I / Ostrick, M / Panzieri, D / Parsamyan, B / Paul, S / Peng, J-C / Pereira, F / Pešek, M / Peshekhonov, D V / Pierre, N / Platchkov, S / Pochodzalla, J / Polyakov, V A / Pretz, J / Quaresma, M / Quintans, C / Ramos, S / Regali, C / Reicherz, G / Riedl, C / Rogacheva, N S / Roskot, M / Ryabchikov, D I / Rybnikov, A / Rychter, A / Salac, R / Samoylenko, V D / Sandacz, A / Santos, C / Sarkar, S / Savin, I A / Sawada, T / Sbrizzai, G / Schiavon, P / Schmidt, K / Schmieden, H / Schönning, K / Seder, E / Selyunin, A / Shevchenko, O Yu / Silva, L / Sinha, L / Sirtl, S / Slunecka, M / Smolik, J / Srnka, A / Steffen, D / Stolarski, M / Subrt, O / Sulc, M / Suzuki, H / Szabelski, A / Szameitat, T / Sznajder, P / Takewaka, S / Tasevsky, M / Tessaro, S / Terça, G / Tessarotto, F / Thiel, A / Tomsa, J / Tosello, F / Tskhay, V / Uhl, S / Vauth, A / Veloso, J / Virius, M / Vit, M / Vondra, J / Wallner, S / Weisrock, T / Wilfert, M / Ter Wolbeek, J / Zaremba, K / Zavada, P / Zavertyaev, M / Zemlyanichkina, E / Zhuravlev, N / Ziembicki, M

    Physical review letters

    2017  Volume 119, Issue 11, Page(s) 112002

    Abstract: The first measurement of transverse-spin-dependent azimuthal asymmetries in the pion-induced Drell-Yan (DY) process is reported. We use the CERN SPS 190  GeV/c π^{-} beam and a transversely polarized ammonia target. Three azimuthal asymmetries giving ... ...

    Abstract The first measurement of transverse-spin-dependent azimuthal asymmetries in the pion-induced Drell-Yan (DY) process is reported. We use the CERN SPS 190  GeV/c π^{-} beam and a transversely polarized ammonia target. Three azimuthal asymmetries giving access to different transverse-momentum-dependent (TMD) parton distribution functions (PDFs) are extracted using dimuon events with invariant mass between 4.3  GeV/c^{2} and 8.5  GeV/c^{2}. Within the experimental uncertainties, the observed sign of the Sivers asymmetry is found to be consistent with the fundamental prediction of quantum chromodynamics (QCD) that the Sivers TMD PDFs extracted from DY have a sign opposite to the one extracted from semi-inclusive deep-inelastic scattering (SIDIS) data. We present two other asymmetries originating from the pion Boer-Mulders TMD PDFs convoluted with either the nucleon transversity or pretzelosity TMD PDFs. A recent COMPASS SIDIS measurement was obtained at a hard scale comparable to that of these DY results. This opens the way for possible tests of fundamental QCD universality predictions.
    Language English
    Publishing date 2017-09-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.119.112002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: First measurement of chiral dynamics in π- γ → π- π- π+.

    Adolph, C / Alekseev, M G / Alexakhin, V Yu / Alexandrov, Yu / Alexeev, G D / Amoroso, A / Antonov, A A / Austregesilo, A / Badełek, B / Balestra, F / Barth, J / Baum, G / Bedfer, Y / Bernhard, J / Bertini, R / Bettinelli, M / Bicker, K A / Birsa, R / Bisplinghoff, J /
    Bordalo, P / Bradamante, F / Braun, C / Bravar, A / Bressan, A / Burtin, E / Chaberny, D / Chiosso, M / Chung, S U / Cicuttin, A / Crespo, M L / Dalla Torre, S / Das, S / Dasgupta, S S / Denisov, O Yu / Dhara, L / Donskov, S V / Doshita, N / Duic, V / Dünnweber, W / Dziewiecki, M / Efremov, A / Elia, C / Eversheim, P D / Eyrich, W / Faessler, M / Ferrero, A / Filin, A / Finger, M / Fischer, H / Franco, C / du Fresne von Hohenesche, N / Friedrich, J M / Garfagnini, R / Gautheron, F / Gavrichtchouk, O P / Gazda, R / Gerassimov, S / Geyer, R / Giorgi, M / Gnesi, I / Gobbo, B / Goertz, S / Grabmüller, S / Grasso, A / Grube, B / Gushterski, R / Guskov, A / Haas, F / von Harrach, D / Hasegawa, T / Heinsius, F H / Herrmann, F / Hess, C / Hinterberger, F / Horikawa, N / Höppner, Ch / d'Hose, N / Huber, S / Ishimoto, S / Ivanov, O / Ivanshin, Yu / Iwata, T / Jahn, R / Jasinski, P / Jegou, G / Joosten, R / Kabuss, E / Kang, D / Ketzer, B / Khaustov, G V / Khokhlov, Yu A / Kisselev, Yu / Klein, F / Klimaszewski, K / Koblitz, S / Koivuniemi, J H / Kolosov, V N / Kondo, K / Königsmann, K / Konorov, I / Konstantinov, V F / Korzenev, A / Kotzinian, A M / Kouznetsov, O / Krämer, M / Kroumchtein, Z V / Kunne, F / Kurek, K / Lauser, L / Lednev, A A / Lehmann, A / Levorato, S / Lichtenstadt, J / Maggiora, A / Magnon, A / Makke, N / Mallot, G K / Mann, A / Marchand, C / Martin, A / Marzec, J / Massmann, F / Matsuda, T / Meyer, W / Michigami, T / Mikhailov, Yu V / Moinester, M A / Morreale, A / Mutter, A / Nagaytsev, A / Nagel, T / Nerling, F / Neubert, S / Neyret, D / Nikolaenko, V I / Nowak, W-D / Nunes, A S / Olshevsky, A G / Ostrick, M / Padee, A / Panknin, R / Panzieri, D / Parsamyan, B / Paul, S / Perevalova, E / Pesaro, G / Peshekhonov, D V / Piragino, G / Platchkov, S / Pochodzalla, J / Polak, J / Polyakov, V A / Pontecorvo, G / Pretz, J / Quintans, C / Rajotte, J-F / Ramos, S / Rapatsky, V / Reicherz, G / Richter, A / Rocco, E / Rondio, E / Rossiyskaya, N S / Ryabchikov, D I / Samoylenko, V D / Sandacz, A / Sapozhnikov, M G / Sarkar, S / Savin, I A / Sbrizzai, G / Schiavon, P / Schill, C / Schlüter, T / Schmitt, L / Schönning, K / Schopferer, S / Schröder, W / Shevchenko, O Yu / Siebert, H-W / Silva, L / Sinha, L / Sissakian, A N / Slunecka, M / Smirnov, G I / Sosio, S / Sozzi, F / Srnka, A / Stolarski, M / Sulc, M / Sulej, R / Sznajder, P / Takekawa, S / Ter Wolbeek, J / Tessaro, S / Tessarotto, F / Teufel, A / Tkatchev, L G / Uhl, S / Uman, I / Vandenbroucke, M / Virius, M / Vlassov, N V / Windmolders, R / Wiślicki, W / Wollny, H / Zaremba, K / Zavertyaev, M / Zemlyanichkina, E / Ziembicki, M / Zhuravlev, N / Zvyagin, A

    Physical review letters

    2012  Volume 108, Issue 19, Page(s) 192001

    Abstract: The COMPASS Collaboration at CERN has investigated the π- γ → π- π- π+ reaction at center-of-momentum energy below five pion masses, sqrt[s]<5m(π), embedded in the Primakoff reaction of 190 GeV pions impinging on a lead target. Exchange of quasireal ... ...

    Abstract The COMPASS Collaboration at CERN has investigated the π- γ → π- π- π+ reaction at center-of-momentum energy below five pion masses, sqrt[s]<5m(π), embedded in the Primakoff reaction of 190 GeV pions impinging on a lead target. Exchange of quasireal photons is selected by isolating the sharp Coulomb peak observed at smallest momentum transfers, t'<0.001  GeV2/c2. Using partial-wave analysis techniques, the scattering intensity of Coulomb production described in terms of chiral dynamics and its dependence on the 3π-invariant mass m(3π)=sqrt[s] were extracted. The absolute cross section was determined in seven bins of sqrt[s] with an overall precision of 20%. At leading order, the result is found to be in good agreement with the prediction of chiral perturbation theory over the whole energy range investigated.
    Language English
    Publishing date 2012-05-11
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.108.192001
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  6. Article ; Online: Observation of a J(PC)=1-+ exotic resonance in diffractive dissociation of 190   GeV/c π- into π- π- π+.

    Alekseev, M G / Alexakhin, V Yu / Alexandrov, Yu / Alexeev, G D / Amoroso, A / Austregesilo, A / Badełek, B / Balestra, F / Ball, J / Barth, J / Baum, G / Bedfer, Y / Bernhard, J / Bertini, R / Bettinelli, M / Birsa, R / Bisplinghoff, J / Bordalo, P / Bradamante, F /
    Bravar, A / Bressan, A / Brona, G / Burtin, E / Bussa, M P / Chapiro, A / Chiosso, M / Chung, S U / Cicuttin, A / Colantoni, M / Crespo, M L / Dalla Torre, S / Dafni, T / Das, S / Dasgupta, S S / Denisov, O Yu / Dhara, L / Diaz, V / Dinkelbach, A M / Donskov, S V / Doshita, N / Duic, V / Dünnweber, W / Efremov, A / El Alaoui, A / Eversheim, P D / Eyrich, W / Faessler, M / Ferrero, A / Finger, M / Fischer, H / Franco, C / Friedrich, J M / Garfagnini, R / Gautheron, F / Gavrichtchouk, O P / Gazda, R / Gerassimov, S / Geyer, R / Giorgi, M / Gobbo, B / Goertz, S / Grabmüller, S / Grajek, O A / Grasso, A / Grube, B / Gushterski, R / Guskov, A / Haas, F / von Harrach, D / Hasegawa, T / Heckmann, J / Heinsius, F H / Hermann, R / Herrmann, F / Hess, C / Hinterberger, F / Horikawa, N / Höppner, Ch / d'Hose, N / Ilgner, C / Ishimoto, S / Ivanov, O / Ivanshin, Yu / Iwata, T / Jahn, R / Jasinski, P / Jegou, G / Joosten, R / Kabuss, E / Kang, D / Ketzer, B / Khaustov, G V / Khokhlov, Yu A / Kisselev, Yu / Klein, F / Klimaszewski, K / Koblitz, S / Koivuniemi, J H / Kolosov, V N / Komissarov, E V / Kondo, K / Königsmann, K / Konopka, R / Konorov, I / Konstantinov, V F / Korzenev, A / Kotzinian, A M / Kouznetsov, O / Kowalik, K / Krämer, M / Kral, A / Kroumchtein, Z V / Kuhn, R / Kunne, F / Kurek, K / Lauser, L / Le Goff, J M / Lednev, A A / Lehmann, A / Levorato, S / Lichtenstadt, J / Liska, T / Maggiora, A / Maggiora, M / Magnon, A / Mallot, G K / Mann, A / Marchand, C / Marroncle, J / Martin, A / Marzec, J / Massmann, F / Matsuda, T / Maximov, A N / Meyer, W / Michigami, T / Mikhailov, Yu V / Moinester, M A / Mutter, A / Nagaytsev, A / Nagel, T / Nassalski, J / Negrini, T / Nerling, F / Neubert, S / Neyret, D / Nikolaenko, V I / Olshevsky, A G / Ostrick, M / Padee, A / Panknin, R / Panzieri, D / Parsamyan, B / Paul, S / Pawlukiewicz-Kaminska, B / Perevalova, E / Pesaro, G / Peshekhonov, D V / Piragino, G / Platchkov, S / Pochodzalla, J / Polak, J / Polyakov, V A / Pontecorvo, G / Pretz, J / Quintans, C / Rajotte, J-F / Ramos, S / Rapatsky, V / Reicherz, G / Reggiani, D / Richter, A / Robinet, F / Rocco, E / Rondio, E / Ryabchikov, D I / Samoylenko, V D / Sandacz, A / Santos, H / Sapozhnikov, M G / Sarkar, S / Savin, I A / Sbrizzai, G / Schiavon, P / Schill, C / Schlüter, T / Schmitt, L / Schopferer, S / Schröder, W / Shevchenko, O Yu / Siebert, H-W / Silva, L / Sinha, L / Sissakian, A N / Slunecka, M / Smirnov, G I / Sosio, S / Sozzi, F / Srnka, A / Stolarski, M / Sulc, M / Sulej, R / Takekawa, S / Tessaro, S / Tessarotto, F / Teufel, A / Tkatchev, L G / Uhl, S / Uman, I / Venugopal, G / Virius, M / Vlassov, N V / Vossen, A / Weitzel, Q / Windmolders, R / Wiślicki, W / Wollny, H / Zaremba, K / Zavertyaev, M / Zemlyanichkina, E / Ziembicki, M / Zhao, J / Zhuravlev, N / Zvyagin, A

    Physical review letters

    2010  Volume 104, Issue 24, Page(s) 241803

    Abstract: The COMPASS experiment at the CERN SPS has studied the diffractive dissociation of negative pions into the π- π- π+ final state using a 190  GeV/c pion beam hitting a lead target. A partial wave analysis has been performed on a sample of 420,000 events ... ...

    Abstract The COMPASS experiment at the CERN SPS has studied the diffractive dissociation of negative pions into the π- π- π+ final state using a 190  GeV/c pion beam hitting a lead target. A partial wave analysis has been performed on a sample of 420,000 events taken at values of the squared 4-momentum transfer t' between 0.1 and 1  GeV2/c2. The well-known resonances a1(1260), a2(1320), and π2(1670) are clearly observed. In addition, the data show a significant natural-parity exchange production of a resonance with spin-exotic quantum numbers J(PC)=1-+ at 1.66  GeV/c2 decaying to ρπ. The resonant nature of this wave is evident from the mass-dependent phase differences to the J(PC)=2-+ and 1++ waves. From a mass-dependent fit a resonance mass of (1660±10(-64)(+0))  MeV/c2 and a width of (269±21(-64)(+42))  MeV/c2 are deduced, with an intensity of (1.7±0.2)% of the total intensity.
    Language English
    Publishing date 2010-06-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.104.241803
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Book ; Online: Spin alignment and violation of the OZI rule in exclusive $\omega$ and $\phi$ production in pp collisions

    Adolph, C. / Akhunzyanov, R. / Alexeev, M. G. / Alexeev, G. D. / Amoroso, A. / Andrieux, V. / Anosov, V. / Austregesilo, A. / Badelek, B. / Balestra, F. / Barth, J. / Baum, G. / Beck, R. / Bedfer, Y. / Berlin, A. / Bernhard, J. / Bicker, K. / Bieling, J. / Birsa, R. /
    Bisplinghoff, J. / Bodlak, M. / Boer, M. / Bordalo, P. / Bradamante, F. / Braun, C. / Bressan, A. / Buechele, M. / Burtin, E. / Capozza, L. / Chiosso, M. / Chung, S. U. / Cicuttin, A. / Crespo, M. L. / Curiel, Q. / Torre, S. Dalla / Dasgupta, S. S. / Dasgupta, S. / Denisov, O. Yu. / Donskov, S. V. / Doshita, N. / Duic, V. / Duennweber, W. / Dziewiecki, M. / Efremov, A. / Elia, C. / Eversheim, P. D. / Eyrich, W. / Faessler, M. / Ferrero, A. / Filin, A. / Finger, M. / Finger, r. M. / Fischer, H. / Franco, C. / von Hohenesche, N. du Fresne / Friedrich, J. M. / Frolov, V. / Gautheron, F. / Gavrichtchouk, O. P. / Gerassimov, S. / Geyer, R. / Gnesi, I. / Gobbo, B. / Goertz, S. / Gorzellik, M. / Grabmueller, S. / Grasso, A. / Grube, B. / Grussenmeyer, T. / Guskov, A. / Guthoerl, T. / Haas, F. / von Harrach, D. / Hahne, D. / Hashimoto, R. / Heinsius, F. H. / Herrmann, F. / Hinterberger, F. / Hoeppner, h. / Horikawa, N. / d'Hose, N. / Huber, S. / Ishimoto, S. / Ivanov, A. / Ivanshin, u. / Iwata, T. / Jahn, R. / Jary, V. / Jasinski, P. / Joerg, P. / Joosten, R. / Kabuss, E. / Ketzer, B. / Khaustov, G. V. / Khokhlov, u. A. / Kisselev, u. / Klein, F. / Klimaszewski, K. / Koivuniemi, J. H. / Kolosov, V. N. / Kondo, K. / Koenigsmann, K. / Konorov, I. / Konstantinov, V. F. / Kotzinian, A. M. / Kouznetsov, O. / Kraemer, M. / Kroumchtein, Z. V. / Kuchinski, N. / Kunne, F. / Kurek, K. / Kurjata, R. P. / Lednev, A. A. / Lehmann, A. / Levillain, M. / Levorato, S. / Lichtenstadt, J. / Maggiora, A. / Magnon, A. / Makke, N. / Mallot, G. K. / Marchand, C. / Martin, A. / Marzec, J. / Matousek, J. / Matsuda, H. / Matsuda, T. / Meshcheryakov, G. / Meyer, W. / Michigami, T. / Mikhailov, u. V. / Miyachi, Y. / Nagaytsev, A. / Nagel, T. / Nerling, F. / Neubert, S. / Neyret, D. / Nikolaenko, V. I. / Novy, J. / Nowak, W. -D. / Nunes, A. S. / Olshevsky, A. G. / Orlov, I. / Ostrick, M. / Panknin, R. / Panzieri, D. / Parsamyan, B. / Paul, S. / Peshekhonov, D. / Platchkov, S. / Pochodzalla, J. / Polyakov, V. A. / Pretz, J. / Quaresma, M. / Quintans, C. / Ramos, S. / Regali, C. / Reicherz, G. / Rocco, E. / Rossiyskaya, N. S. / Ryabchikov, D. I. / Rychter, A. / Samoylenko, V. D. / Sandacz, A. / Sarkar, S. / Savin, I. A. / Sbrizzai, G. / Schiavon, P. / Schill, C. / Schlueter, T. / Schmidt, K. / Schmieden, H. / Schoenning, K. / Schopferer, S. / Schott, M. / Shevchenko, O. Yu. / Silva, L. / Sinha, L. / Sirtl, S. / Slunecka, M. / Sosio, S. / Sozzi, F. / Srnka, A. / Steiger, L. / Stolarski, M. / Sulc, M. / Sulej, R. / Suzuki, H. / Szabelski, A. / Szameitat, T. / Sznajder, P. / Takekawa, S. / ter Wolbeek, J. / Tessaro, S. / Tessarotto, F. / Thibaud, F. / Uhl, S. / Uman, I. / Virius, M. / Wang, L. / Weisrock, T. / Wilfert, M. / Windmolders, R. / Wollny, H. / Zaremba, K. / Zavertyaev, M. / Zemlyanichkina, E. / Ziembicki, M. / Zink, A.

    2014  

    Abstract: Exclusive production of the isoscalar vector mesons $\omega$ and $\phi$ is measured with a 190 GeV$/c$ proton beam impinging on a liquid hydrogen target. Cross section ratios are determined in three intervals of the Feynman variable $x_{F}$ of the fast ... ...

    Abstract Exclusive production of the isoscalar vector mesons $\omega$ and $\phi$ is measured with a 190 GeV$/c$ proton beam impinging on a liquid hydrogen target. Cross section ratios are determined in three intervals of the Feynman variable $x_{F}$ of the fast proton. A significant violation of the OZI rule is found, confirming earlier findings. Its kinematic dependence on $x_{F}$ and on the invariant mass $M_{p\mathrm{V}}$ of the system formed by fast proton $p_\mathrm{fast}$ and vector meson $V$ is discussed in terms of diffractive production of $p_\mathrm{fast}V$ resonances in competition with central production. The measurement of the spin density matrix element $\rho_{00}$ of the vector mesons in different selected reference frames provides another handle to distinguish the contributions of these two major reaction types. Again, dependences of the alignment on $x_{F}$ and on $M_{p\mathrm{V}}$ are found. Most of the observations can be traced back to the existence of several excited baryon states contributing to $\omega$ production which are absent in the case of the $\phi$ meson. Removing the low-mass $M_{p\mathrm{V}}$ resonant region, the OZI rule is found to be violated by a factor of eight, independently of $x_\mathrm{F}$.

    Comment: 23 pages, 13 figures and 5 tables
    Keywords High Energy Physics - Experiment ; Nuclear Experiment
    Subject code 660
    Publishing date 2014-05-25
    Publishing country us
    Document type Book ; Online
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  8. Book ; Online: Odd and Even Partial Waves of $\eta\pi^-$ and $\eta'\pi^-$ in $\pi^-p\to\eta^{(\prime)}\pi^-p$ at $191\,\textrm{GeV}/c$

    Adolph, C. / Akhunzyanov, R. / Alexeev, M. G. / Alexeev, G. D. / Amoroso, A. / Andrieux, V. / Anosov, V. / Austregesilo, A. / Badelek, B. / Balestra, F. / Barth, J. / Baum, G. / Beck, R. / Bedfer, Y. / Berlin, A. / Bernhard, J. / Bicker, K. / Bielert, E. R. / Bieling, J. /
    Birsa, R. / Bisplinghoff, J. / Bodlak, M. / Boer, M. / Bordalo, P. / Bradamante, F. / Braun, C. / Bressan, A. / Buechele, M. / Burtin, E. / Capozza, L. / Chiosso, M. / Chung, S. U. / Cicuttin, A. / Crespo, M. L. / Curiel, Q. / Torre, S. Dalla / Dasgupta, S. S. / Dasgupta, S. / Denisov, O. Yu. / Donskov, S. V. / Doshita, N. / Duic, V. / Duennweber, W. / Dziewiecki, M. / Efremov, A. / Elia, C. / Eversheim, P. D. / Eyrich, W. / Faessler, M. / Ferrero, A. / Filin, A. / Finger, M. / Finger jr., M. / Fischer, H. / Franco, C. / von Hohenesche, N. du Fresne / Friedrich, J. M. / Frolov, V. / Gautheron, F. / Gavrichtchouk, O. P. / Gerassimov, S. / Geyer, R. / Gnesi, I. / Gobbo, B. / Goertz, S. / Gorzellik, M. / Grabmueller, S. / Grasso, A. / Grube, B. / Grussenmeyer, T. / Guskov, A. / Haas, F. / von Harrach, D. / Hahne, D. / Hashimoto, R. / Heinsius, F. H. / Herrmann, F. / Hinterberger, F. / Hoeppner, Ch. / Horikawa, N. / d'Hose, N. / Huber, S. / Ishimoto, S. / Ivanov, A. / Ivanshin, Yu. / Iwata, T. / Jahn, R. / Jary, V. / Jasinski, P. / Joerg, P. / Joosten, R. / Kabuss, E. / Ketzer, B. / Khaustov, G. V. / Khokhlov, Yu. A. / Kisselev, Yu. / Klein, F. / Klimaszewski, K. / Koivuniemi, J. H. / Kolosov, V. N. / Kondo, K. / Koenigsmann, K. / Konorov, I. / Konstantinov, V. F. / Kotzinian, A. M. / Kouznetsov, O. / Kraemer, M. / Kroumchtein, Z. V. / Kuchinski, N. / Kunne, F. / Kurek, K. / Kurjata, R. P. / Lednev, A. A. / Lehmann, A. / Levillain, M. / Levorato, S. / Lichtenstadt, J. / Maggiora, A. / Magnon, A. / Makke, N. / Mallot, G. K. / Marchand, C. / Martin, A. / Marzec, J. / Matousek, J. / Matsuda, H. / Matsuda, T. / Meshcheryakov, G. / Meyer, W. / Michigami, T. / Mikhailov, Yu. V. / Miyachi, Y. / Nagaytsev, A. / Nagel, T. / Nerling, F. / Neubert, S. / Neyret, D. / Nikolaenko, V. I. / Novy, J. / Nowak, W. -D. / Nunes, A. S. / Olshevsky, A. G. / Orlov, I. / Ostrick, M. / Panknin, R. / Panzieri, D. / Parsamyan, B. / Paul, S. / Peshekhonov, D. V. / Platchkov, S. / Pochodzalla, J. / Polyakov, V. A. / Pretz, J. / Quaresma, M. / Quintans, C. / Ramos, S. / Regali, C. / Reicherz, G. / Rocco, E. / Rossiyskaya, N. S. / Ryabchikov, D. I. / Rychter, A. / Samoylenko, V. D. / Sandacz, A. / Sarkar, S. / Savin, I. A. / Sbrizzai, G. / Schiavon, P. / Schill, C. / Schlueter, T. / Schmidt, K. / Schmieden, H. / Schoenning, K. / Schopferer, S. / Schott, M. / Shevchenko, O. Yu. / Silva, L. / Sinha, L. / Sirtl, S. / Slunecka, M. / Sosio, S. / Sozzi, F. / Srnka, A. / Steiger, L. / Stolarski, M. / Sulc, M. / Sulej, R. / Suzuki, H. / Szabelski, A. / Szameitat, T. / Sznajder, P. / Takekawa, S. / ter Wolbeek, J. / Tessaro, S. / Tessarotto, F. / Thibaud, F. / Uhl, S. / Uman, I. / Virius, M. / Wang, L. / Weisrock, T. / Wilfert, M. / Windmolders, R. / Wollny, H. / Zaremba, K. / Zavertyaev, M. / Zemlyanichkina, E. / Ziembicki, M. / Zink, A.

    2014  

    Abstract: Exclusive production of $\eta\pi^-$ and $\eta'\pi^-$ has been studied with a $191\,\textrm{GeV}/c$ $\pi^-$ beam impinging on a hydrogen target at COMPASS (CERN). Partial-wave analyses reveal different odd/even angular momentum ($L$) characteristics in ... ...

    Abstract Exclusive production of $\eta\pi^-$ and $\eta'\pi^-$ has been studied with a $191\,\textrm{GeV}/c$ $\pi^-$ beam impinging on a hydrogen target at COMPASS (CERN). Partial-wave analyses reveal different odd/even angular momentum ($L$) characteristics in the inspected invariant mass range up to $3\,\textrm{GeV}/c^2$. A striking similarity between the two systems is observed for the $L=2,4,6$ intensities (scaled by kinematical factors) and the relative phases. The known resonances $a_2(1320)$ and $a_4(2040)$ are in line with this similarity. In contrast, a strong enhancement of $\eta'\pi^-$ over $\eta\pi^-$ is found for the $L=1,3,5$ waves, which carry non-$q\bar q$ quantum numbers. The $L=1$ intensity peaks at $1.7\,\textrm{GeV}/c^2$ in $\eta'\pi^-$ and at $1.4\,\textrm{GeV}/c^2$ in $\eta\pi^-$, the corresponding phase motions with respect to $L=2$ are different.

    Comment: 16 pages, 5 figures and 1 table
    Keywords High Energy Physics - Experiment ; Nuclear Experiment
    Subject code 551
    Publishing date 2014-08-19
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Book ; Online: Azimuthal asymmetries of charged hadrons produced in high-energy muon scattering off longitudinally polarised deuterons

    Adolph, C. / Aghasyan, M. / Akhunzyanov, R. / Alexeev, M. G. / Alexeev, G. D. / Amoroso, A. / Andrieux, V. / Anfimov, N. V. / Anosov, V. / Augsten, K. / Augustyniak, W. / Austregesilo, A. / Azevedo, C. D. R. / Badelek, B. / Balestra, F. / Ball, M. / Barth, J. / Beck, R. / Bedfer, Y. /
    Bernhard, J. / Bicker, K. / Bielert, E. R. / Birsa, R. / Bodlak, M. / Bordalo, P. / Bradamante, F. / Braun, C. / Bressan, A. / Buechele, M. / Chang, W. -C. / Chatterjee, C. / Chiosso, M. / Choi, I. / Chung, S. -U. / Cicuttin, A. / Crespo, M. L. / Curiel, Q. / Torre, S. Dalla / Dasgupta, S. S. / Dasgupta, S. / Denisov, O. Yu. / Dhara, L. / Donskov, S. V. / Doshita, N. / Dreisbach, Ch. / Duic, V. / Duennweber, W. / Dziewiecki, M. / Efremov, A. / Eversheim, P. D. / Eyrich, W. / Faessler, M. / Ferrero, A. / Finger, M. / Finger jr., M. / Fischer, H. / Franco, C. / von Hohenesche, N. du Fresne / Friedrich, J. M. / Frolov, V. / Fuchey, E. / Gautheron, F. / Gavrichtchouk, O. P. / Gerassimov, S. / Giarra, J. / Giordano, F. / Gnesi, I. / Gorzellik, M. / Grabmueller, S. / Grasso, A. / Perdekamp, M. Grosse / Grube, B. / Grussenmeyer, T. / Guskov, A. / Haas, F. / Hahne, D. / Hamar, G. / von Harrach, D. / Heinsius, F. H. / Heitz, R. / Herrmann, F. / Horikawa, N. / d'Hose, N. / Hsieh, C. -Y. / Huber, S. / Ishimoto, S. / Ivanov, A. / Ivanshin, Yu. / Iwata, T. / Jary, V. / Joosten, R. / Joerg, P. / Kabuss, E. / Ketzer, B. / Khaustov, G. V. / Khokhlov, Yu. A. / Kisselev, Yu. / Klein, F. / Klimaszewski, K. / Koivuniemi, J. H. / Kolosov, V. N. / Kondo, K. / Koenigsmann, K. / Konorov, I. / Konstantinov, V. F. / Kotzinian, A. M. / Kouznetsov, O. M. / Kraemer, M. / Kremser, P. / Krinner, F. / Kroumchtein, Z. V. / Kulinich, Y. / Kunne, F. / Kurek, K. / Kurjata, R. P. / Lednev, A. A. / Lehmann, A. / Levillain, M. / Levorato, S. / Lian, Y. -S. / Lichtenstadt, J. / Longo, R. / Maggiora, A. / Magnon, A. / Makins, N. / Makke, N. / Mallot, G. K. / Marianski, B. / Martin, A. / Marzec, J. / Matousek, J. / Matsuda, H. / Matsuda, T. / Meshcheryakov, G. V. / Meyer, M. / Meyer, W. / Mikhailov, Yu. V. / Mikhasenko, M. / Mitrofanov, E. / Mitrofanov, N. / Miyachi, Y. / Nagaytsev, A. / Nerling, F. / Neyret, D. / Novy, J. / Nowak, W. -D. / Nukazuka, G. / Nunes, A. S. / Olshevsky, A. G. / Orlov, I. / Ostrick, M. / Panzieri, D. / Parsamyan, B. / Paul, S. / Peng, J. -C. / Pereira, F. / Pesek, M. / Peshekhonov, D. V. / Pierre, N. / Platchkov, S. / Pochodzalla, J. / Polyakov, V. A. / Pretz, J. / Quaresma, M. / Quintans, C. / Ramos, S. / Regali, C. / Reicherz, G. / Riedl, C. / Roskot, M. / Rossiyskaya, N. S. / Ryabchikov, D. I. / Rybnikov, A. / Rychter, A. / Salac, R. / Samoylenko, V. D. / Sandacz, A. / Santos, C. / Sarkar, S. / Savin, I. A. / Sawada, T. / Sbrizzai, G. / Schiavon, P. / Schmidt, K. / Schmieden, H. / Schoenning, K. / Seder, E. / Selyunin, A. / Silva, L. / Sinha, L. / Sirtl, S. / Slunecka, M. / Smolik, J. / Srnka, A. / Steffen, D. / Stolarski, M. / Subrt, O. / Sulc, M. / Suzuki, H. / Szabelski, A. / Szameitat, T. / Sznajder, P. / Takekawa, S. / Tasevsky, M. / Tessaro, S. / Tessarotto, F. / Thibaud, F. / Thiel, A. / Tosello, F. / Tskhay, V. / Uhl, S. / Veloso, J. / Virius, M. / Vondra, J. / Wallner, S. / Weisrock, T. / Wilfert, M. / ter Wolbeek, J. / Zaremba, K. / Zavada, P. / Zavertyaev, M. / Zemlyanichkina, E. / Zhuravlev, N. / Ziembicki, M. / Zink, A.

    2016  

    Abstract: Single hadron azimuthal asymmetries of positive and negative hadrons produced in muon semi-inclusive deep inelastic scattering off longitudinally polarised deuterons are determined using the 2006 COMPASS data and also combined all deuteron COMPASS data. ... ...

    Abstract Single hadron azimuthal asymmetries of positive and negative hadrons produced in muon semi-inclusive deep inelastic scattering off longitudinally polarised deuterons are determined using the 2006 COMPASS data and also combined all deuteron COMPASS data. For each hadron charge, the dependence of the azimuthal asymmetry on the hadron azimuthal angle $\phi$ is obtained by means of a five-parameter fitting function that besides a $\phi$-independent term includes four modulations predicted by theory: $\sin\phi$, $\sin 2 \phi$, $\sin 3\phi$ and $\cos\phi$. The amplitudes of the five terms have been extracted, first, for the hadrons in the whole available kinematic region. In further fits, performed for hadrons from a restricted kinematic region, the $\phi$-dependence is determined as a function of one of three variables (Bjorken-$x$, fractional energy of virtual photon taken by the outgoing hadron and hadron transverse momentum), while disregarding the others. Except the $\phi$-independent term, all the modulation amplitudes are very small, and no clear kinematic dependence could be observed within experimental uncertainties.

    Comment: 15 pages, 5 figures
    Keywords High Energy Physics - Experiment ; High Energy Physics - Phenomenology
    Subject code 612
    Publishing date 2016-09-20
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  10. Article: Search for supersymmetry with gauge-mediated breaking in diphoton events at D0.

    Abazov, V M / Abbott, B / Abolins, M / Acharya, B S / Adams, D L / Adams, M / Adams, T / Agelou, M / Agram, J-L / Ahmed, S N / Ahn, S H / Alexeev, G D / Alkhazov, G / Alton, A / Alverson, G / Alves, G A / Anderson, S / Andrieu, B / Arnoud, Y /
    Askew, A / Asman, B / Atramentov, O / Autermann, C / Avila, C / Babukhadia, L / Bacon, T C / Baden, A / Baffioni, S / Baldin, B / Balm, P W / Banerjee, S / Barberis, E / Bargassa, P / Baringer, P / Barnes, C / Barreto, J / Bartlett, J F / Bassler, U / Bauer, D / Bean, A / Beauceron, S / Beaudette, F / Begel, M / Bellavance, A / Beri, S B / Bernardi, G / Bernhard, R / Bertram, I / Besançon, M / Besson, A / Beuselinck, R / Bezzubov, V A / Bhat, P C / Bhatnagar, V / Bhattacharjee, M / Binder, M / Bischoff, A / Black, K M / Blackler, I / Blazey, G / Blekman, F / Bloch, D / Blumenschein, U / Boehnlein, A / Boeriu, O / Bolton, T A / Bonamy, P / Borcherding, F / Borissov, G / Bos, K / Bose, T / Boswell, C / Brandt, A / Briskin, G / Brock, R / Brooijmans, G / Bross, A / Buchanan, N J / Buchholz, D / Buehler, M / Buescher, V / Burdin, S / Burnett, T H / Busato, E / Butler, J M / Bystricky, J / Canelli, F / Carvalho, W / Casey, B C K / Casey, D / Cason, N M / Castilla-Valdez, H / Chakrabarti, S / Chakraborty, D / Chan, K M / Chandra, A / Chapin, D / Charles, F / Cheu, E / Chevalier, L / Cho, D K / Choi, S / Chopra, S / Christiansen, T / Christofek, L / Claes, D / Clark, A R / Clément, B / Clément, C / Coadou, Y / Colling, D J / Coney, L / Connolly, B / Cooke, M / Cooper, W E / Coppage, D / Corcoran, M / Coss, J / Cothenet, A / Cousinou, M-C / Crépé-Renaudin, S / Cristetiu, M / Cummings, M A C / Cutts, D / da Motta, H / Davies, B / Davies, G / Davis, G A / De, K / de Jong, P / de Jong, S J / De La Cruz-Burelo, E / De Oliveira Martins, C / Dean, S / Del Signore, K / Déliot, F / Delsart, P A / Demarteau, M / Demina, R / Demine, P / Denisov, D / Denisov, S P / Desai, S / Diehl, H T / Diesburg, M / Doidge, M / Dong, H / Doulas, S / Duflot, L / Dugad, S R / Duperrin, A / Dyer, J / Dyshkant, A / Eads, M / Edmunds, D / Edwards, T / Ellison, J / Elmsheuser, J / Eltzroth, J T / Elvira, V D / Eno, S / Ermolov, P / Eroshin, O V / Estrada, J / Evans, D / Evans, H / Evdokimov, A / Evdokimov, V N / Fast, J / Fatakia, S N / Fein, D / Feligioni, L / Ferbel, T / Fiedler, F / Filthaut, F / Fisher, W / Fisk, H E / Fleuret, F / Fortner, M / Fox, H / Freeman, W / Fu, S / Fuess, S / Galea, C F / Gallas, E / Galyaev, E / Gao, M / Garcia, C / Garcia-Bellido, A / Gardner, J / Gavrilov, V / Gelé, D / Gelhaus, R / Genser, K / Gerber, C E / Gershtein, Y / Geurkov, G / Ginther, G / Goldmann, K / Golling, T / Gómez, B / Gounder, K / Goussiou, A / Graham, G / Grannis, P D / Greder, S / Green, J A / Greenlee, H / Greenwood, Z D / Gregores, E M / Grinstein, S / Grivaz, J-F / Groer, L / Grünendahl, S / Grünewald, M W / Gu, W / Gurzhiev, S N / Gutierrez, G / Gutierrez, P / Haas, A / Hadley, N J / Haggerty, H / Hagopian, S / Hall, I / Hall, R E / Han, C / Han, L / Hanagaki, K / Hanlet, P / Harder, K / Harrington, R / Hauptman, J M / Hauser, R / Hays, C / Hays, J / Hebbeker, T / Hebert, C / Hedin, D / Heinmiller, J M / Heinson, A P / Heintz, U / Hensel, C / Hesketh, G / Hildreth, M D / Hirosky, R / Hobbs, J D / Hoeneisen, B / Hohlfeld, M / Hong, S J / Hooper, R / Hou, S / Hu, Y / Huang, J / Huang, Y / Iashvili, I / Illingworth, R / Ito, A S / Jabeen, S / Jaffré, M / Jain, S / Jain, V / Jakobs, K / Jenkins, A / Jesik, R / Jiang, Y / Johns, K / Johnson, M / Johnson, P / Jonckheere, A / Jonsson, P / Jöstlein, H / Juste, A / Kado, M M / Käfer, D / Kahl, W / Kahn, S / Kajfasz, E / Kalinin, A M / Kalk, J / Karmanov, D / Kasper, J / Kau, D / Ke, Z / Kehoe, R / Kermiche, S / Kesisoglou, S / Khanov, A / Kharchilava, A / Kharzheev, Y M / Kim, K H / Klima, B / Klute, M / Kohli, J M / Kopal, M / Korablev, V M / Kotcher, J / Kothari, B / Kotwal, A V / Koubarovsky, A / Kouchner, A / Kouznetsov, O / Kozelov, A V / Kozminski, J / Krane, J / Krishnaswamy, M R / Krzywdzinski, S / Kubantsev, M / Kuleshov, S / Kulik, Y / Kunori, S / Kupco, A / Kurca, T / Kuznetsov, V E / Lager, S / Lahrichi, N / Landsberg, G / Lazoflores, J / Le Bihan, A-C / Lebrun, P / Lee, S W / Lee, W M / Leflat, A / Leggett, C / Lehner, F / Leonidopoulos, C / Lewis, P / Li, J / Li, Q Z / Li, X / Lima, J G R / Lincoln, D / Linn, S L / Linnemann, J / Lipaev, V V / Lipton, R / Lobo, L / Lobodenko, A / Lokajicek, M / Lounis, A / Lu, J / Lubatti, H J / Lucotte, A / Lueking, L / Luo, C / Lynker, M / Lyon, A L / Maciel, A K A / Madaras, R J / Mättig, P / Magerkurth, A / Magnan, A-M / Maity, M / Mal, P K / Malik, S / Malyshev, V L / Manankov, V / Mao, H S / Maravin, Y / Marshall, T / Martens, M / Martin, M I / Mattingly, S E K / Mayorov, A A / McCarthy, R / McCroskey, R / McMahon, T / Meder, D / Melanson, H L / Melnitchouk, A / Meng, X / Merkin, M / Merritt, K W / Meyer, A / Miao, C / Miettinen, H / Mihalcea, D / Mishra, C S / Mitrevski, J / Mokhov, N / Molina, J / Mondal, N K / Montgomery, H E / Moore, R W / Mostafa, M / Muanza, G S / Mulders, M / Mutaf, Y D / Nagy, E / Nang, F / Narain, M / Narasimham, V S / Naumann, N A / Neal, H A / Negret, J P / Nelson, S / Neustroev, P / Noeding, C / Nomerotski, A / Novaes, S F / Nunnemann, T / Nurse, E / O'Dell, V / O'Neil, D C / Oguri, V / Oliveira, N / Olivier, B / Oshima, N / Otero y Garzón, G J / Padley, P / Papageorgiou, K / Parashar, N / Park, J / Park, S K / Parsons, J / Partridge, R / Parua, N / Patwa, A / Perea, P M / Perez, E / Peters, O / Pétroff, P / Petteni, M / Phaf, L / Piegaia, R / Podesta-Lerma, P L M / Podstavkov, V M / Pope, B G / Popkov, E / Prado da Silva, W L / Prosper, H B / Protopopescu, S / Przybycien, M B / Qian, J / Quadt, A / Quinn, B / Rani, K J / Rapidis, P A / Ratoff, P N / Reay, N W / Renardy, J-F / Reucroft, S / Rha, J / Ridel, M / Rijssenbeek, M / Ripp-Baudot, I / Rizatdinova, F / Royon, C / Rubinov, P / Ruchti, R / Sabirov, B M / Sajot, G / Sánchez-Hernández, A / Sanders, M P / Santoro, A / Savage, G / Sawyer, L / Scanlon, T / Schamberger, R D / Schellman, H / Schieferdecker, P / Schmitt, C / Schukin, A A / Schwartzman, A / Schwienhorst, R / Sengupta, S / Severini, H / Shabalina, E / Shary, V / Shephard, W D / Shpakov, D / Sidwell, R A / Simak, V / Sirotenko, V / Skow, D / Skubic, P / Slattery, P / Smith, R P / Smolek, K / Snow, G R / Snow, J / Snyder, S / Söldner-Rembold, S / Song, X / Song, Y / Sonnenschein, L / Sopczak, A / Sorín, V / Sosebee, M / Soustruznik, K / Souza, M / Spurlock, B / Stanton, N R / Stark, J / Steele, J / Steinbrück, G / Stevenson, K / Stolin, V / Stone, A / Stoyanova, D A / Strandberg, J / Strang, M A / Strauss, M / Ströhmer, R / Strovink, M / Stutte, L / Sznajder, A / Talby, M / Tamburello, P / Taylor, W / Telford, P / Temple, J / Tentindo-Repond, S / Thomas, E / Thooris, B / Tomoto, M / Toole, T / Torborg, J / Towers, S / Trefzger, T / Trincaz-Duvoid, S / Trippe, T G / Tuchming, B / Tully, C / Turcot, A S / Tuts, P M / Uvarov, L / Uvarov, S / Uzunyan, S / Vachon, B / Van Kooten, R / van Leeuwen, W M / Varelas, N / Varnes, E W / Vasilyev, I A / Vaupel, M / Verdier, P / Vertogradov, L S / Verzocchi, M / Villeneuve-Seguier, F / Vlimant, J-R / Von Toerne, E / Vreeswijk, M / Vu Anh, T / Wahl, H D / Walker, R / Wallace, N / Wang, Z-M / Warchol, J / Warsinsky, M / Watts, G / Wayne, M / Weber, M / Weerts, H / Wegner, M / Wermes, N / White, A / White, V / Whiteson, D / Wicke, D / Wijngaarden, D A / Wilson, G W / Wimpenny, S J / Wittlin, J / Wlodek, T / Wobisch, M / Womersley, J / Wood, D R / Wu, Z / Wyatt, T R / Xu, Q / Xuan, N / Yamada, R / Yasuda, T / Yatsunenko, Y A / Yen, Y / Yip, K / Youn, S W / Yu, J / Yurkewicz, A / Zabi, A / Zatserklyaniy, A / Zdrazil, M / Zeitnitz, C / Zhang, B / Zhang, D / Zhang, X / Zhao, T / Zhao, Z / Zheng, H / Zhou, B / Zhou, Z / Zhu, J / Zielinski, M / Zieminska, D / Zieminski, A / Zitoun, R / Zutshi, V / Zverev, E G / Zylberstejn, A

    Physical review letters

    2005  Volume 94, Issue 4, Page(s) 41801

    Abstract: We report the results of a search for supersymmetry (SUSY) with gauge-mediated breaking in the missing transverse energy distribution of inclusive diphoton events using 263 pb(-1) of data collected by the D0 experiment at the Fermilab Tevatron Collider ... ...

    Abstract We report the results of a search for supersymmetry (SUSY) with gauge-mediated breaking in the missing transverse energy distribution of inclusive diphoton events using 263 pb(-1) of data collected by the D0 experiment at the Fermilab Tevatron Collider in 2002-2004. No excess is observed above the background expected from standard model processes, and lower limits on the masses of the lightest neutralino and chargino of about 108 and 195 GeV, respectively, are set at the 95% confidence level. These are the most stringent limits to date for models with gauge-mediated SUSY breaking with a short-lived neutralino as the next-to-lightest SUSY particle.
    Language English
    Publishing date 2005-02-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.94.041801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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