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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
*Corresponding author for this work
  • Friedrich-Alexander University Erlangen-Nürnberg
  • Joint Institute for Nuclear Research
  • National Institute for Nuclear Physics
  • RAS - P.N. Lebedev Physics Institute
  • University of Turin
  • CEA-Saclay Center
  • CERN
  • Technical University of Munich
  • University of Warsaw
  • University of Bonn
  • Bielefeld University
  • Ruhr University Bochum
  • Johannes Gutenberg University Mainz
  • Charles University
  • Laboratório de Instrumentação e Física Experimental de Partículas
  • University of Lisbon
  • University of Trieste
  • University of Freiburg
  • Pusan National University
  • Brookhaven National Laboratory
  • Abdus Salam International Centre for Theoretical Physics
  • Matrivani Institute of Experimental Research & Education
  • Institute for High Energy Physics
  • Yamagata University
  • Ludwig Maximilian University of Munich
  • Warsaw University of Technology
  • Nagoya University
  • Chubu University
  • High Energy Accelerator Research Organization, Tsukuba
  • Czech Technical University in Prague
  • Moscow Institute of Physics and Technology
  • National Centre for Nuclear Research
  • University of Miyazaki
  • University of Eastern Piedmont
  • Technical University of Liberec
  • RWTH Aachen University
  • Czech Academy of Sciences

Research output: Contribution to journalArticlepeer-review

74 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, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume736
DOIs
StatePublished - 7 Sep 2014

Funding

FundersFunder number
European Commission
Seventh Framework Programme283286
Fundação para a Ciência e a TecnologiaCERN/FP/116376/2010

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