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  1. 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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  2. 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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  3. Article: First measurement of the transverse spin asymmetries of the deuteron in semi-inclusive deep inelastic scattering.

    Alexakhin, V Yu / Alexandrov, Yu / Alexeev, G D / Amoroso, A / Badełek, B / Balestra, F / Ball, J / Baum, G / Bedfer, Y / Berglund, P / Bernet, C / Bertini, R / Birsa, R / Bisplinghoff, J / Bradamante, F / Bravar, A / Bressan, A / Burtin, E / Bussa, M P /
    Cerini, L / Chapiro, A / Cicuttin, A / Colantoni, M / Colavita, A A / Costa, S / Crespo, M L / d'Hose, N / Dalla Torre, S / Dasgupta, S S / De Masi, R / Dedek, N / Denisov, O Yu / Dhara, L / Diaz Kavka, V / Dolgopolov, A V / Donskov, S V / Dorofeev, V A / Doshita, N / Duic, V / Dünnweber, W / Efremov, A / Ehlers, J / Eversheim, P D / Eyrich, W / Fabro, M / Faessler, M / Fauland, P / Ferrero, A / Ferrero, L / Finger, M / Fischer, H / Franz, J / Friedrich, J M / Frolov, V / Fuchs, U / Garfagnini, R / Gautheron, F / Gavrichtchouk, O P / Gerassimov, S / Geyer, R / Giorgi, M / Gobbo, B / Goertz, S / Grajek, O A / Grasso, A / Grube, B / Grünemaier, A / Gustafsson, K / Hannappel, J / von Harrach, D / Hasegawa, T / Hedicke, S / Heinsius, F H / Hinterberger, F / von Hodenberg, M / Horikawa, N / Horikawa, S / Ijaduola, R B / Ilgner, C / Ishimoto, S / Iwata, T / Jahn, R / Janata, A / Joosten, R / Jouravlev, N I / Kabuss, E / Kalinnikov, V / Kang, D / Karstens, F / Kastaun, W / Ketzer, B / Khaustov, G V / Khokhlov, Yu A / Kisselev, Yu / Klein, F / Koivuniemi, J H / Kolosov, V N / Komissarov, E V / Kondo, K / Königsmann, K / Konoplyannikov, A K / Konorov, I / Konstantinov, V F / Korentchenko, A S / Korzenev, A / Kotzinian, A M / Koutchinski, N A / Kowalik, K / Kravchuk, N P / Krivokhizhin, G V / Kroumchtein, Z V / Kuhn, R / Kunne, F / Kurek, K / Lamanna, M / Le Goff, J M / Leberig, M / Lichtenstadt, J / Maggiora, A / Maggiora, M / Magnon, A / Mallot, G K / Manuilov, I V / Marchand, C / Marroncle, J / Martin, A / Marzec, J / Matsuda, T / Maximov, A N / Medved, K S / Meyer, W / Mielech, A / Mikhailov, Yu V / Moinester, M A / Nähle, O / Nassalski, J / Neyret, D P / Nikolaenko, V I / Nozdrin, A A / Obraztsov, V F / Olshevsky, A G / Ostrick, M / Padee, A / Pagano, P / Panebianco, S / Panzieri, D / Paul, S / Pereira, H D / Peshekhonov, D V / Peshekhonov, V D / Piragino, G / Platchkov, S / Platzer, K / Pochodzalla, J / Polyakov, V A / Popov, A A / Pretz, J / Rebourgeard, P C / Reicherz, G / Reymann, J / Rozhdestvensky, A M / Rondio, E / Sadovski, A B / Saller, E / Samoylenko, V D / Sandacz, A / Sans, M / Sapozhnikov, M G / Savin, I A / Schiavon, P / Schmidt, T / Schmitt, H / Schmitt, L / Shishkin, A A / Siebert, H / Sinha, L / Sissakian, A N / Skachkova, A / Slunecka, M / Smirnov, G I / Sugonyaev, V P / Stinzing, F / Sulej, R / Takabayashi, N / Tchalishev, V V / Tessarotto, F / Teufel, A / Thers, D / Tkatchev, L G / Toeda, T / Tretyak, V I / Trousov, S / Vlassov, N V / Webb, R / Weise, E / Wiesmann, M / Windmolders, R / Wirth, S / Wiślicki, W / Zanetti, A M / Zaremba, K / Zhao, J / Ziegler, R / Zvyagin, A

    Physical review letters

    2005  Volume 94, Issue 20, Page(s) 202002

    Abstract: First measurements of the Collins and Sivers asymmetries of charged hadrons produced in deep-inelastic scattering of muons on a transversely polarized 6LiD target are presented. The data were taken in 2002 with the COMPASS spectrometer using the muon ... ...

    Abstract First measurements of the Collins and Sivers asymmetries of charged hadrons produced in deep-inelastic scattering of muons on a transversely polarized 6LiD target are presented. The data were taken in 2002 with the COMPASS spectrometer using the muon beam of the CERN SPS at 160 GeV/c. The Collins asymmetry turns out to be compatible with zero, as does the measured Sivers asymmetry within the present statistical errors.
    Language English
    Publishing date 2005-05-27
    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.94.202002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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