A high-statistics measurement of transverse spin effects in dihadron production from muon–proton semi-inclusive deep-inelastic scattering

Adolph, C.; Akhunzyanov, R.; Alekseev, M. G.; Alexandrov, Y. u.; 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.; Bertini, R.; Bicker, K.; Bieling, J.; Birsa, R.; Bisplinghoff, J.; Bodlak, M.; Boer, M.; Bordalo, P.; Bradamante, Franco; Braun, C.; Bravar, A.; Bressan, Andrea; Büchele, M.; Burtin, E.; Capozza, L.; Chiosso, M.; Chung, S. U.; Cicuttin, A.; Crespo, M. L.; Curiel, Q.; Dalla Torre, Silvia; Dasgupta, S. S.; Dasgupta, S.; Denisov, O. Y. u.; Donskov, S. V.; Doshita, N.; Duic, Venicio; Dünnweber, W.; Dziewiecki, M.; Efremov, A.; Elia, C.; Eversheim, P. D.; Eyrich, W.; Faessler, M.; Ferrero, A.; Filin, A.; Finger, M.; Finger, M.; Fischer, H.; Franco, C.; du Fresne von Hohenesche, N.; Friedrich, J. M.; Frolov, V.; Garfagnini, R.; Gautheron, F.; Gavrichtchouk, O. P.; Gerassimov, S.; Geyer, R.; Giorgi, M.; Gnesi, I.; Gobbo, B.; Goertz, S.; Gorzellik, M.; Grabmüller, S.; Grasso, A.; Grube, B.; Guskov, A.; Guthörl, T.; Haas, F.; von Harrach, D.; Hahne, D.; Hashimoto, R.; Heinsius, F. H.; Herrmann, F.; Hinterberger, F.; Höppner, C. h.; Horikawa, N.; D'Hose, N.; Huber, S.; Ishimoto, S.; Ivanov, A.; Ivanshin, Y. u.; Iwata, T.; Jahn, R.; Jary, V.; Jasinski, P.; Joerg, P.; Joosten, R.; Kabuß, E.; Kang, D.; Ketzer, B.; Khaustov, G. V.; Khokhlov, Y. u. A.; Kisselev, Y. u.; Klein, F.; Klimaszewski, K.; Koivuniemi, J. H.; Kolosov, V. N.; Kondo, K.; Königsmann, K.; Konorov, I.; Konstantinov, V. F.; Kotzinian, A. M.; Kouznetsov, O.; Kral, Z.; Krämer, M.; Kroumchtein, Z. V.; Kuchinski, N.; Kunne, F.; Kurek, K.; Kurjata, R. P.; Lednev, A. A.; Lehmann, A.; Levorato, S.; Lichtenstadt, J.; Maggiora, A.; Magnon, A.; Makke, N.; Mallot, G. K.; Marchand, C.; Martin, Anna; Marzec, J.; Matousek, J.; Matsuda, H.; Matsuda, T.; Meshcheryakov, G.; Meyer, W.; Michigami, T.; Mikhailov, Y. 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.; Orlov, I.; Olshevsky, A. G.; Ostrick, M.; Panknin, R.; Panzieri, D.; Parsamyan, B.; Paul, S.; Pesek, M.; Peshekhonov, D.; Piragino, G.; Platchkov, S.; Pochodzalla, J.; Polak, J.; Polyakov, V. A.; Pretz, J.; Quaresma, M.; Quintans, C.; Ramos, S.; Reicherz, G.; Rocco, E.; Rodionov, V.; Rondio, E.; Rychter, A.; Rossiyskaya, N. S.; Ryabchikov, D. I.; Samoylenko, V. D.; Sandacz, A.; Sarkar, S.; Savin, I. A.; Sbrizzai, G.; Schiavon, Paolo; Schill, C.; Schlüter, T.; Schmidt, A.; Schmidt, K.; Schmieden, H.; Schönning, K.; Schopferer, S.; Schott, M.; Shevchenko, O. Y. u.; Silva, L.; Sinha, L.; Sirtl, S.; Slunecka, M.; Sosio, S.; Sozzi, Federica; Srnka, A.; Steiger, L.; Stolarski, M.; Sulc, M.; Sulej, R.; Suzuki, H.; Szabelski, A.; Szameitat, T.; Sznajder, P.; Takekawa, Stefano; ter Wolbeek, J.; Tessaro, S.; Tessarotto, F.; Thibaud, F.; Uhl, S.; Uman, I.; Vandenbroucke, M.; Virius, M.; Vondra, J.; Wang, L.; Weisrock, T.; Wilfert, M.; Windmolders, R.; Wiślicki, W.; Wollny, H.; Zaremba, K.; Zavertyaev, M.; Zemlyanichkina, E.; Ziembicki, M.

doi:10.1016/j.physletb.2014.06.080

A measurement of the azimuthal asymmetry in dihadron production in deep-inelastic scattering of muons on transversely polarised proton (NH3) targets is presented. They provide independent access to the transversity distribution functions through the measurement of the Collins asymmetry in single hadron production. The data were taken in the year 2010 with the COMPASS spectrometer using a 160 GeV/c160 GeV/c muon beam of the CERN SPS, increasing by a factor of about four the overall statistics with respect to the previously published data taken in the year 2007. The measured sizeable asymmetry is in good agreement with the published data. An approximate equality of the Collins asymmetry and the dihadron asymmetry is observed, suggesting a common physical mechanism in the underlying fragmentation.

Titolo:	A high-statistics measurement of transverse spin effects in dihadron production from muon–proton semi-inclusive deep-inelastic scattering
Autori:	Adolph, C. Akhunzyanov, R. Alekseev, M. G. Alexandrov, Y.u. 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. Bertini, R. Bicker, K. Bieling, J. Birsa, R. Bisplinghoff, J. Bodlak, M. Boer, M. Bordalo, P. BRADAMANTE, FRANCO Braun, C. Bravar, A. BRESSAN, Andrea Büchele, M. Burtin, E. Capozza, L. Chiosso, M. Chung, S. U. Cicuttin, A. Crespo, M. L. Curiel, Q. DALLA TORRE, SILVIA Dasgupta, S. S. Dasgupta, S. Denisov, O. Y.u. Donskov, S. V. Doshita, N. DUIC, VENICIO Dünnweber, W. Dziewiecki, M. Efremov, A. Elia, C. Eversheim, P. D. Eyrich, W. Faessler, M. Ferrero, A. Filin, A. Finger, M. Finger, M. Fischer, H. Franco, C. du Fresne von Hohenesche, N. Friedrich, J. M. Frolov, V. Garfagnini, R. Gautheron, F. Gavrichtchouk, O. P. Gerassimov, S. Geyer, R. Giorgi, M. Gnesi, I. Gobbo, B. Goertz, S. Gorzellik, M. Grabmüller, S. Grasso, A. Grube, B. Guskov, A. Guthörl, T. Haas, F. von Harrach, D. Hahne, D. Hashimoto, R. Heinsius, F. H. Herrmann, F. Hinterberger, F. Höppner, C.h. Horikawa, N. D'Hose, N. Huber, S. Ishimoto, S. Ivanov, A. Ivanshin, Y.u. Iwata, T. Jahn, R. Jary, V. Jasinski, P. Joerg, P. Joosten, R. Kabuß, E. Kang, D. Ketzer, B. Khaustov, G. V. Khokhlov, Y.u. A. Kisselev, Y.u. Klein, F. Klimaszewski, K. Koivuniemi, J. H. Kolosov, V. N. Kondo, K. Königsmann, K. Konorov, I. Konstantinov, V. F. Kotzinian, A. M. Kouznetsov, O. Kral, Z. Krämer, M. Kroumchtein, Z. V. Kuchinski, N. Kunne, F. Kurek, K. Kurjata, R. P. Lednev, A. A. Lehmann, A. Levorato, S. Lichtenstadt, J. Maggiora, A. Magnon, A. Makke, N. Mallot, G. K. Marchand, C. MARTIN, ANNA Marzec, J. Matousek, J. Matsuda, H. Matsuda, T. Meshcheryakov, G. Meyer, W. Michigami, T. Mikhailov, Y.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. Orlov, I. Olshevsky, A. G. Ostrick, M. Panknin, R. Panzieri, D. Parsamyan, B. Paul, S. Pesek, M. Peshekhonov, D. Piragino, G. Platchkov, S. Pochodzalla, J. Polak, J. Polyakov, V. A. Pretz, J. Quaresma, M. Quintans, C. Ramos, S. Reicherz, G. Rocco, E. Rodionov, V. Rondio, E. Rychter, A. Rossiyskaya, N. S. Ryabchikov, D. I. Samoylenko, V. D. Sandacz, A. Sarkar, S. Savin, I. A. Sbrizzai, G. SCHIAVON, PAOLO Schill, C. Schlüter, T. Schmidt, A. Schmidt, K. Schmieden, H. Schönning, K. Schopferer, S. Schott, M. Shevchenko, O. Y.u. Silva, L. Sinha, L. Sirtl, S. Slunecka, M. Sosio, S. SOZZI, FEDERICA Srnka, A. Steiger, L. Stolarski, M. Sulc, M. Sulej, R. Suzuki, H. Szabelski, A. Szameitat, T. Sznajder, P. TAKEKAWA, STEFANO ter Wolbeek, J. Tessaro, S. Tessarotto, F. Thibaud, F. Uhl, S. Uman, I. Vandenbroucke, M. Virius, M. Vondra, J. Wang, L. Weisrock, T. Wilfert, M. Windmolders, R. Wiślicki, W. Wollny, H. Zaremba, K. Zavertyaev, M. Zemlyanichkina, E. Ziembicki, M. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2014
Rivista:	PHYSICS LETTERS. SECTION B
Abstract:	A measurement of the azimuthal asymmetry in dihadron production in deep-inelastic scattering of muons on transversely polarised proton (NH3) targets is presented. They provide independent access to the transversity distribution functions through the measurement of the Collins asymmetry in single hadron production. The data were taken in the year 2010 with the COMPASS spectrometer using a 160 GeV/c160 GeV/c muon beam of the CERN SPS, increasing by a factor of about four the overall statistics with respect to the previously published data taken in the year 2007. The measured sizeable asymmetry is in good agreement with the published data. An approximate equality of the Collins asymmetry and the dihadron asymmetry is observed, suggesting a common physical mechanism in the underlying fragmentation.
Handle:	http://hdl.handle.net/11368/2829537
Digital Object Identifier (DOI):	http://dx.doi.org/10.1016/j.physletb.2014.06.080
URL:	http://www.sciencedirect.com/science/article/pii/S0370269314004857
Appare nelle tipologie:	1.1 Articolo in Rivista

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