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

• Published in: arXiv.org
• Main Authors: Adolph, C, Alexeev, G D, Andrieux, V, Balestra, F, Barth, J, Baum, G, Beck, R, Berlin, A, Bernhard, J, Bertini, R, Bicker, K, Bieling, J, Bisplinghoff, J, Bodlak, M, Boer, M, Bordalo, P, Cicuttin, A, Crespo, M L, Curiel, Q, Dasgupta, S, Eyrich, W, Faessler, M, Finger, M, N du Fresne von Hohenesche, Frolov, V, Garfagnini, R, Gavrichtchouk, O P, Gerassimov, S, Geyer, R, Goertz, S, Gorzellik, M, Grasso, A, Grube, B, Guskov, A, Guthoerl, T, Haas, F, Hahne, D, Horikawa, N, Huber, S, Ishimoto, S, Ivanov, A, Jary, V, Kang, D, Ketzer, B, Khaustov, G V, Klimaszewski, K, Koivuniemi, J H, Kondo, K, Konstantinov, V F, Kotzinian, A M, Kouznetsov, O, Kral, Z, Kroumchtein, Z V, Kurek, K, Kurjata, R P, Lednev, A A, Lichtenstadt, J, Magnon, A, Marchand, C, Martin, A, Matousek, J, Matsuda, H, Meyer, W, Michigami, T, Miyachi, Y, Neubert, S, Nikolaenko, V I, Novy, J, Nunes, A S, Orlov, I, Panknin, R, Parsamyan, B, Peshekhonov, D, Pochodzalla, J, Polak, J, Pretz, J, Quaresma, M, Reicherz, G, Rocco, E, Rondio, E, Rychter, A, Sarkar, S, Schiavon, P, Schill, C, Schlueter, T, Schmidt, A, Schmidt, K, Schmieden, H, Schott, M, Sosio, S, Sozzi, F, Steiger, L, Sulej, R, Suzuki, H, Szameitat, T, Sznajder, P, Tessarotto, F, Weisrock, T, Wilfert, M, Wollny, H
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 30.01.2014
• Subjects: Asymmetry; CERN; Distribution functions; Inelastic scattering; Magnetic properties; Muons; Particle beams; Physics - High Energy Physics - Experiment; Physics - High Energy Physics - Phenomenology; Synchrotrons
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1401.7873

A measurement of the azimuthal asymmetry in dihadron production in deep-inelastic scattering of muons on transversely polarised proton (NH\(_{3}\)) targets are 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 \(160\,\mbox{GeV}/c\) muon beam of the CERN SPS, increasing by a factor of about three the available statistics of 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.