{"paper":{"title":"Experimental investigation of transverse spin asymmetries in muon-p SIDIS processes: Sivers asymmetries","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A.A. Antonov, A.A. Lednev, A. Amoroso, A. Austregesilo, A. Bravar, A. Bressan, A. Cicuttin, A. Efremov, A. Ferrero, A. Filin, A.G. Olshevsky, A. Grasso, A. Guskov, A. Korzenev, A. Lehmann, A. Maggiora, A. Magnon, A. Mann, A. Martin, A.M. Kotzinian, A. Morreale, A. Mutter, A. Nagaytsev, A.N. Sissakian, A. Padee, A. Richter, A. Sandacz, A.S. Nunes, A. Srnka, A. Zvyagin, B. Badelek, B. Gobbo, B. Grube, B. Ketzer, B. Parsamyan, C. Adolph, C. Braun, C. Elia, C. Franco, C. Hess, Ch. Hoeppner, C. Marchand, C. Quintans, C. Schill, D.I. Ryabchikov, D. Kang, D. Neyret, D. Panzieri, D. von Harrach, D.V. Peshekhonov, E. Burtin, E. Kabuss, E. Perevalova, E. Rocco, E. Rondio, E. Zemlyanichkina, F. Balestra, F. Bradamante, F. Gautheron, F. Haas, F. Herrmann, F.H. Heinsius, F. Hinterberger, F. Klein, F. Kunne, F. Nerling, F. Sozzi, F. Tessarotto, G. Baum, G.D. Alexeev, G.I. Smirnov, G.K. Mallot, G. Meshcheryakov, G. Pesaro, G. Piragino, G. Reicherz, G. Sbrizzai, G.V. Khaustov, H. Fischer, H. Suzuki, H. Wollny, I.A. Savin, I. Gnesi, I. Konorov, I. Uman, J. Barth, J. Bernhard, J. Bieling, J. Bisplinghoff, J.-F. Rajotte, J.H. Koivuniemi, J. Lichtenstadt, J. Marzec, J.M. Friedrich, J. Pochodzalla, J. Polak, J. Pretz, J. Ter Wolbeek, K. Bicker, K. Klimaszewski, K. Koenigsmann, K. Kondo, K. Kurek, K. Schmidt, K. Schoenning, K. Zaremba, L. Capozza, L. Dhara, L.G. Tkatchev, L. Lauser, L. Schmitt, L. Silva, L. Sinha, L. Steiger, L. Wang, M.A. Moinester, M. Bettinelli, M. Chiosso, M. Dziewiecki, M. Faessler, M. Finger, M. Finger Jr., M.G. Alekseev, M. Giorgi, M.G. Sapozhnikov, M. Kraemer, M.L. Crespo, M. Ostrick, M. Quaresma, M. Schott, M. Slunecka, M. Stolarski, M. Sulc, M. Vandenbroucke, M. Virius, M. Wilfert, M. Zavertyaev, M. Ziembicki, N. d'Hose, N. Doshita, N. du Fresne von Hohenesche, N. Horikawa, N. Makke, N.S. Rossiyskaya, N.V. Vlassov, N. Zhuravlev, O. Ivanov, O. Kouznetsov, O.P. Gavrichtchouk, O.Yu. Denisov, O.Yu. Shevchenko, P. Bordalo, P.D. Eversheim, P. Jasinski, P. Schiavon, P. Sznajder, R. Bertini, R. Birsa, R. Garfagnini, R. Geyer, R. Gushterski, R. Jahn, R. Joosten, R. Panknin, R. Sulej, R. Windmolders, S. Dalla Torre, S. Das, S. Dasgupta, S. Gerassimov, S. Goertz, S. Grabmueller, S. Ishimoto, S. Koblitz, S. Levorato, S. Neubert, S. Paul, S. Platchkov, S. Ramos, S. Sarkar, S. Schopferer, S.S. Dasgupta, S. Sosio, S. Takekawa, S. Tessaro, S.U. Chung, S. Uhl, S.V. Donskov, T. Guthoerl, T. Iwata, T. Liska, T. Matsuda, T. Michigami, T. Nagel, T. Negrini, T. Schlueter, V.A. Polyakov, V.D. Samoylenko, V. Duic, V.F. Konstantinov, V. Frolov, V.I. Nikolaenko, V. Jary, V.N. Kolosov, V. Rapatsky, V.Yu. Alexakhin, W.D. Nowak, W. Duennweber, W. Eyrich, W. Meyer, W. Schroeder, W. Wislicki, Y. Bedfer, Yu.A. Khokhlov, Yu. Alexandrov, Yu. Ivanshin, Yu. Kisselev, Yu.V. Mikhailov, Z.V. Kroumchtein","submitted_at":"2012-05-23T07:59:50Z","abstract_excerpt":"The COMPASS Collaboration at CERN has measured the transverse spin azimuthal asymmetry of charged hadrons produced in semi-inclusive deep inelastic scattering using a 160 GeV positive muon beam and a transversely polarised NH_3 target. The Sivers asymmetry of the proton has been extracted in the Bjorken x range 0.003<x<0.7. The new measurements have small statistical and systematic uncertainties of a few percent and confirm with considerably better accuracy the previous COMPASS measurement. The Sivers asymmetry is found to be compatible with zero for negative hadrons and positive for positive "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.5122","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}