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  1. 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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  2. 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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  3. 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)

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  4. 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
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. 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
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. 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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    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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