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

  • C. Adolph
  • , R. Akhunzyanov
  • , M. G. Alekseev
  • , Yu Alexandrov
  • , G. D. Alexeev
  • , A. Amoroso
  • , V. Andrieux
  • , V. Anosov
  • , A. Austregesilo
  • , B. Badełek
  • , F. Balestra
  • , J. Barth
  • , G. Baum
  • , R. Beck
  • , Y. Bedfer
  • , A. Berlin
  • , J. Bernhard
  • , R. Bertini
  • , K. Bicker
  • , J. Bieling
  • R. Birsa, J. Bisplinghoff, M. Bodlak, M. Boer, P. Bordalo, F. Bradamante, C. Braun, A. Bravar, A. Bressan, M. Büchele, E. Burtin, L. Capozza, M. Chiosso, S. U. Chung, A. Cicuttin, M. L. Crespo, Q. Curiel, S. Dalla Torre, S. S. Dasgupta, S. Dasgupta, O. Yu Denisov, S. V. Donskov, N. Doshita, V. Duic, W. Dünnweber, M. Dziewiecki, A. Efremov, C. Elia, P. D. Eversheim, W. Eyrich, M. Faessler, A. Ferrero, A. Filin, M. Finger, M. Finger, H. Fischer, C. Franco, N. du Fresne von Hohenesche, J. M. Friedrich, V. Frolov, R. Garfagnini, F. Gautheron, O. P. Gavrichtchouk, S. Gerassimov, R. Geyer, M. Giorgi, I. Gnesi, B. Gobbo, S. Goertz, M. Gorzellik, S. Grabmüller, A. Grasso, B. Grube, A. Guskov, T. Guthörl, F. Haas, D. von Harrach, D. Hahne, R. Hashimoto, F. H. Heinsius, F. Herrmann, F. Hinterberger, Ch Höppner, N. Horikawa, N. d'Hose, S. Huber, S. Ishimoto, A. Ivanov, Yu Ivanshin, T. Iwata, R. Jahn, V. Jary, P. Jasinski, P. Joerg, R. Joosten, E. Kabuß, D. Kang, B. Ketzer, G. V. Khaustov, Yu A. Khokhlov, Yu Kisselev, F. Klein, K. Klimaszewski, J. H. Koivuniemi, V. N. Kolosov, K. Kondo, K. Königsmann, I. Konorov, V. F. Konstantinov, A. M. Kotzinian, O. Kouznetsov, Z. Kral, M. Krämer, Z. V. Kroumchtein, N. Kuchinski, F. Kunne, K. Kurek, R. P. Kurjata, A. A. Lednev, A. Lehmann, S. Levorato, J. Lichtenstadt, A. Maggiora, A. Magnon, N. Makke, G. K. Mallot, C. Marchand, A. Martin, J. Marzec, J. Matousek, H. Matsuda, T. Matsuda, G. Meshcheryakov, W. Meyer, T. Michigami, Yu V. Mikhailov, Y. Miyachi, A. Nagaytsev, T. Nagel, F. Nerling, S. Neubert, D. Neyret, V. I. Nikolaenko, J. Novy, W. D. Nowak, A. S. Nunes, I. Orlov, A. G. Olshevsky, M. Ostrick, R. Panknin, D. Panzieri, B. Parsamyan, S. Paul, M. Pesek, D. Peshekhonov, G. Piragino, S. Platchkov, J. Pochodzalla, J. Polak, V. A. Polyakov, J. Pretz, M. Quaresma, C. Quintans, S. Ramos, G. Reicherz, E. Rocco, V. Rodionov, E. Rondio, A. Rychter, N. S. Rossiyskaya, D. I. Ryabchikov, V. D. Samoylenko, A. Sandacz, S. Sarkar, I. A. Savin, G. Sbrizzai, P. Schiavon, C. Schill, T. Schlüter, A. Schmidt, K. Schmidt, H. Schmieden, K. Schönning, S. Schopferer, M. Schott, O. Yu Shevchenko, L. Silva, L. Sinha, S. Sirtl, M. Slunecka, S. Sosio, F. Sozzi, A. Srnka, L. Steiger, M. Stolarski, M. Sulc, R. Sulej, H. Suzuki, A. Szabelski, T. Szameitat, P. Sznajder, S. Takekawa, J. ter Wolbeek, S. Tessaro, F. Tessarotto, F. Thibaud, S. Uhl, I. Uman, M. Vandenbroucke, M. Virius, J. Vondra, L. Wang, T. Weisrock, M. Wilfert, R. Windmolders, W. Wiślicki, H. Wollny, K. Zaremba, M. Zavertyaev, E. Zemlyanichkina, M. Ziembicki
  • Friedrich Alexander Universität Erlangen-Nürnberg
  • Joint Inst. for Nuclear Research
  • INFN- Sezione di Trieste
  • P.N. Lebedev Physical Institute of the Russian Academy of Sciences
  • University of Torino
  • INFN Sez. di Torino
  • CEA Saclay
  • European Organization for Nuclear Research
  • Technical University of Munich
  • University of Warsaw
  • University of Bonn
  • Universität Bielefeld
  • Max-Planck-lnstitut für Kohlenforschung
  • Johannes Gutenberg University
  • Charles University
  • LIP - Lisboa
  • Instituto Superior Técnico
  • University of Trieste Via A
  • University of Freiburg
  • Pusan National University
  • Brookhaven National Laboratory Physics Department
  • ICTP
  • Matrivani Inst. Exp. Res. and Educ.
  • Institute for High Energy Physics (IHEP)
  • Yamagata University
  • University of Munich
  • Warsaw Institute of Technology
  • Nagoya University
  • Chubu University
  • High Energy Accelerator Research Organization (KEK)
  • Czech Technical University in Prague
  • Moscow Institute of Physics and Technology
  • National Center for Nuclear Research (NCBJ)
  • Tel Aviv University
  • University of Miyazaki
  • University of Eastern Piedmont
  • Technical University of Liberec
  • RWTH Aachen University
  • Institute of Scientific Instruments of the Academy of Sciences of the Czech Republic

Research output: Contribution to journalArticlepeer-review

73 Scopus citations

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/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.

Original languageEnglish
Pages (from-to)124-131
Number of pages8
JournalPhysics Letters B
Volume736
DOIs
StatePublished - 7 Sep 2014

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