Measurement of P T -weighted Sivers asymmetries in leptoproduction of hadron

Alexeev, M.G. (University of Turin, Dept. of Physics, Turin, 10125, Italy) ; Alexeev, G.D. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Amoroso, A. (University of Turin, Dept. of Physics, Turin, 10125, Italy) (Torino Section of INFN, Turin, 10125, Italy) ; Andrieux, V. (University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL, 61801-3080, USA) (IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, 91191, France) ; Anfimov, N.V. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Anosov, V. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Antoshkin, A. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Augsten, K. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) (Czech Technical University in Prague, Prague, 16636, Czech Republic) ; Augustyniak, W. (National Centre for Nuclear Research, Warsaw, 00-681, Poland) ; Azevedo, C.D.R. (University of Aveiro, Dept. of Physics, Aveiro, 3810-193, Portugal) ; Badełek, B. (University of Warsaw, Faculty of Physics, Warsaw, 02-093, Poland) ; Balestra, F. (University of Turin, Dept. of Physics, Turin, 10125, Italy) (Torino Section of INFN, Turin, 10125, Italy) ; Ball, M. (Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, Bonn, 53115, Germany) ; Barth, J. (Universität Bonn, Physikalisches Institut, Bonn, 53115, Germany) ; Barone, V. (Universita' degli Studi del Piemonte Orientale “A. Avogadro”, Di.S.I.T., Alessandria, 15121, Italy) (Torino Section of INFN, Turin, 10125, Italy) ; Beck, R. (Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, Bonn, 53115, Germany) ; Bedfer, Y. (IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, 91191, France) ; Bernhard, J. (Universität Mainz, Institut für Kernphysik, Mainz, 55099, Germany) (CERN, Geneva 23, 1211, Switzerland) ; Bicker, K. (Technische Universität München, Physik Dept., Garching, 85748, Germany) (CERN, Geneva 23, 1211, Switzerland) ; Bielert, E.R. (CERN, Geneva 23, 1211, Switzerland) ; Bodlak, M. (Charles University in Prague, Faculty of Mathematics and Physics, Prague, 18000, Czech Republic) ; Bordalo, P. (LIP, Lisbon, 1000-149, Portugal) ; Bradamante, F. (University of Trieste, Dept. of Physics, Trieste, 34127, Italy) (Trieste Section of INFN, Trieste, 34127, Italy) ; Bressan, A. (University of Trieste, Dept. of Physics, Trieste, 34127, Italy) (Trieste Section of INFN, Trieste, 34127, Italy) ; Büchele, M. (Universität Freiburg, Physikalisches Institut, Freiburg, 79104, Germany) ; Burtsev, V.E. (Tomsk Polytechnic University, Tomsk, 634050, Russia) ; Chang, W.-C. (Academia Sinica, Institute of Physics, Taipei, 11529, Taiwan) ; Chatterjee, C. (Matrivani Institute of Experimental Research & Education, Calcutta, 700 030, India) ; Chiosso, M. (University of Turin, Dept. of Physics, Turin, 10125, Italy) (Torino Section of INFN, Turin, 10125, Italy) ; Chumakov, A.G. (Tomsk Polytechnic University, Tomsk, 634050, Russia) ; Chung, S.-U. (Technische Universität München, Physik Dept., Garching, 85748, Germany) ; Cicuttin, A. (Trieste Section of INFN, Trieste, 34127, Italy) ; Crespo, M.L. (Trieste Section of INFN, Trieste, 34127, Italy) ; Dalla Torre, S. (Trieste Section of INFN, Trieste, 34127, Italy) ; Dasgupta, S.S. (Matrivani Institute of Experimental Research & Education, Calcutta, 700 030, India) ; Dasgupta, S. (University of Trieste, Dept. of Physics, Trieste, 34127, Italy) (Trieste Section of INFN, Trieste, 34127, Italy) ; Denisov, O.Yu. (Torino Section of INFN, Turin, 10125, Italy) ; Dhara, L. (Matrivani Institute of Experimental Research & Education, Calcutta, 700 030, India) ; Donskov, S.V. (State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, Protvino, 142281, Russia) ; Doshita, N. (Yamagata University, Yamagata, 992-8510, Japan) ; Dreisbach, Ch. (Technische Universität München, Physik Dept., Garching, 85748, Germany) ; Dünnweber, W. (Universita' degli Studi del Piemonte Orientale “A. Avogadro”, Di.S.I.T., 15121 Alessandria, Italy) (University of Aveiro, Dept. of Physics, 3810-193 Aveiro, Portugal) (Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany 20 20 Supported by BMBF - Bundesministerium für Bildung und Forschung (Germany) 21 21 Supported by FP7, HadronPhysics3, Grant 283286 (European Union)) (Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany 20) (Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany 20) (Institute of Scientific Instruments, AS CR, 61264 Brno, Czech Republic 22 22 Supported by MEYS, Grant LG13031 (Czech Republic)) (Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India 23 23 Supported by B.Sen fund (India)) (Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia 24 24 Supported by CERN-RFBR Grant 12-02-91500) (Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany 20 21) (CERN, 1211 Geneva 23, Switzerland) (Technical University in Liberec, 46117 Liberec, Czech Republic 22) (LIP, 1000-149 Lisbon, Portugal 25 25 Supported by FCT - Fundação para a Ciência e Tecnologia, COMPETE and QREN, Grants CERN/FP 116376/2010, 123600/2011 and CERN/FIS-NUC/0017/2015 (Portugal)) (Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany 20) (University of Miyazaki, Miyazaki 889-2192, Japan 26 26 Supported by MEXT and JSPS, Grants 18002006, 20540299, 18540281 and 26247032, the Daiko and Yamada Foundations (Japan)) (Lebedev Physical Institute, 119991 Moscow, Russia) (Technische Universität München, Physik Dept., 85748 Garching, Germany 20 5 5 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ ( www.universe-cluster.de ) (Germany)) (Nagoya University, 464 Nagoya, Japan 26) (Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic 22) (Czech Technical University in Prague, 16636 Prague, Czech Republic 22) (State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia) (IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France 21) (Academia Sinica, Institute of Physics, Taipei 11529, Taiwan 27 27 Supported by the Ministry of Science and Technology (Taiwan)) (Tel Aviv University, School of Physics and Astronomy, 69978 Tel Aviv, Israel 28 28 Supported by the Israel Academy of Sciences and Humanities (Israel)) (University of Trieste, Dept. of Physics, 34127 Trieste, Italy) (Trieste Section of INFN, 34127 Trieste, Italy) (University of Turin, Dept. of Physics, 10125 Turin, Italy) (Torino Section of INFN, 10125 Turin, Italy) (Tomsk Polytechnic University, 634050 Tomsk, Russia 29 29 Supported by the Russian Federation program “Nauka” (Contract No. 0.1764.GZB.2017) (Russia)) (University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL 61801-3080, USA 30 30 Supported by the National Science Foundation, Grant no. PHY-1506416 (USA)) (National Centre for Nuclear Research, 00-681 Warsaw, Poland 31 31 Supported by NCN, Grant 2017/26/M/ST2/00498 (Poland)) (University of Warsaw, Faculty of Physics, 02-093 Warsaw, Poland 31) (Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland 31) (Yamagata University, Yamagata 992-8510, Japan 26) ; Dusaev, R.R. (Tomsk Polytechnic University, Tomsk, 634050, Russia) ; Dziewiecki, M. (Warsaw University of Technology, Institute of Radioelectronics, Warsaw, 00-665, Poland) ; Efremov, A. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Elia, C. (University of Trieste, Dept. of Physics, Trieste, 34127, Italy) (Trieste Section of INFN, Trieste, 34127, Italy) ; Eversheim, P.D. (Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, Bonn, 53115, Germany) ; Faessler, M. (Universita' degli Studi del Piemonte Orientale “A. Avogadro”, Di.S.I.T., 15121 Alessandria, Italy) (University of Aveiro, Dept. of Physics, 3810-193 Aveiro, Portugal) (Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany 20 20 Supported by BMBF - Bundesministerium für Bildung und Forschung (Germany) 21 21 Supported by FP7, HadronPhysics3, Grant 283286 (European Union)) (Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany 20) (Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany 20) (Institute of Scientific Instruments, AS CR, 61264 Brno, Czech Republic 22 22 Supported by MEYS, Grant LG13031 (Czech Republic)) (Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India 23 23 Supported by B.Sen fund (India)) (Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia 24 24 Supported by CERN-RFBR Grant 12-02-91500) (Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany 20 21) (CERN, 1211 Geneva 23, Switzerland) (Technical University in Liberec, 46117 Liberec, Czech Republic 22) (LIP, 1000-149 Lisbon, Portugal 25 25 Supported by FCT - Fundação para a Ciência e Tecnologia, COMPETE and QREN, Grants CERN/FP 116376/2010, 123600/2011 and CERN/FIS-NUC/0017/2015 (Portugal)) (Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany 20) (University of Miyazaki, Miyazaki 889-2192, Japan 26 26 Supported by MEXT and JSPS, Grants 18002006, 20540299, 18540281 and 26247032, the Daiko and Yamada Foundations (Japan)) (Lebedev Physical Institute, 119991 Moscow, Russia) (Technische Universität München, Physik Dept., 85748 Garching, Germany 20 5 5 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ ( www.universe-cluster.de ) (Germany)) (Nagoya University, 464 Nagoya, Japan 26) (Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic 22) (Czech Technical University in Prague, 16636 Prague, Czech Republic 22) (State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia) (IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France 21) (Academia Sinica, Institute of Physics, Taipei 11529, Taiwan 27 27 Supported by the Ministry of Science and Technology (Taiwan)) (Tel Aviv University, School of Physics and Astronomy, 69978 Tel Aviv, Israel 28 28 Supported by the Israel Academy of Sciences and Humanities (Israel)) (University of Trieste, Dept. of Physics, 34127 Trieste, Italy) (Trieste Section of INFN, 34127 Trieste, Italy) (University of Turin, Dept. of Physics, 10125 Turin, Italy) (Torino Section of INFN, 10125 Turin, Italy) (Tomsk Polytechnic University, 634050 Tomsk, Russia 29 29 Supported by the Russian Federation program “Nauka” (Contract No. 0.1764.GZB.2017) (Russia)) (University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL 61801-3080, USA 30 30 Supported by the National Science Foundation, Grant no. PHY-1506416 (USA)) (National Centre for Nuclear Research, 00-681 Warsaw, Poland 31 31 Supported by NCN, Grant 2017/26/M/ST2/00498 (Poland)) (University of Warsaw, Faculty of Physics, 02-093 Warsaw, Poland 31) (Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland 31) (Yamagata University, Yamagata 992-8510, Japan 26) ; Ferrero, A. (IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, 91191, France) ; Finger, M. (Charles University in Prague, Faculty of Mathematics and Physics, Prague, 18000, Czech Republic) ; Finger, M. (Charles University in Prague, Faculty of Mathematics and Physics, Prague, 18000, Czech Republic) ; Fischer, H. (Universität Freiburg, Physikalisches Institut, Freiburg, 79104, Germany) ; Franco, C. (LIP, Lisbon, 1000-149, Portugal) ; du Fresne von Hohenesche, N. (Universität Mainz, Institut für Kernphysik, Mainz, 55099, Germany) (CERN, Geneva 23, 1211, Switzerland) ; Friedrich, J.M. (Technische Universität München, Physik Dept., Garching, 85748, Germany) ; Frolov, V. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) (CERN, Geneva 23, 1211, Switzerland) ; Gautheron, F. (Universität Bochum, Institut für Experimentalphysik, Bochum, 44780, Germany) (University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL, 61801-3080, USA) ; Gavrichtchouk, O.P. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Gerassimov, S. (Lebedev Physical Institute, Moscow, 119991, Russia) (Technische Universität München, Physik Dept., Garching, 85748, Germany) ; Giarra, J. (Universität Mainz, Institut für Kernphysik, Mainz, 55099, Germany) ; Gnesi, I. (University of Turin, Dept. of Physics, Turin, 10125, Italy) (Torino Section of INFN, Turin, 10125, Italy) ; Gorzellik, M. (Universität Freiburg, Physikalisches Institut, Freiburg, 79104, Germany) ; Grasso, A. (University of Turin, Dept. of Physics, Turin, 10125, Italy) (Torino Section of INFN, Turin, 10125, Italy) ; Gridin, A. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Grosse Perdekamp, M. (University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL, 61801-3080, USA) ; Grube, B. (Technische Universität München, Physik Dept., Garching, 85748, Germany) ; Guskov, A. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Hahne, D. (Universität Bonn, Physikalisches Institut, Bonn, 53115, Germany) ; Hamar, G. (Trieste Section of INFN, Trieste, 34127, Italy) ; von Harrach, D. (Universität Mainz, Institut für Kernphysik, Mainz, 55099, Germany) ; Heitz, R. (University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL, 61801-3080, USA) ; Herrmann, F. (Universität Freiburg, Physikalisches Institut, Freiburg, 79104, Germany) ; Horikawa, N. (Nagoya University, Nagoya, 464, Japan) ; d'Hose, N. (IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, 91191, France) ; Hsieh, C.-Y. (Academia Sinica, Institute of Physics, Taipei, 11529, Taiwan) ; Huber, S. (Technische Universität München, Physik Dept., Garching, 85748, Germany) ; Ishimoto, S. (Yamagata University, Yamagata, 992-8510, Japan) ; Ivanov, A. (University of Turin, Dept. of Physics, Turin, 10125, Italy) (Torino Section of INFN, Turin, 10125, Italy) ; Iwata, T. (Yamagata University, Yamagata, 992-8510, Japan) ; Jandek, M. (Czech Technical University in Prague, Prague, 16636, Czech Republic) ; Jary, V. (Czech Technical University in Prague, Prague, 16636, Czech Republic) ; Joosten, R. (Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, Bonn, 53115, Germany) ; Jörg, P. (Universität Freiburg, Physikalisches Institut, Freiburg, 79104, Germany) ; Juraskova, K. (Czech Technical University in Prague, Prague, 16636, Czech Republic) ; Kabuß, E. (Universität Mainz, Institut für Kernphysik, Mainz, 55099, Germany) ; Kaspar, F. (Technische Universität München, Physik Dept., Garching, 85748, Germany) ; Kerbizi, A. (University of Trieste, Dept. of Physics, Trieste, 34127, Italy) (Trieste Section of INFN, Trieste, 34127, Italy) ; Ketzer, B. (Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, Bonn, 53115, Germany) ; Khaustov, G.V. (State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, Protvino, 142281, Russia) ; Khokhlov, Yu.A. (State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, Protvino, 142281, Russia) ; Kisselev, Yu. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Klein, F. (Universität Bonn, Physikalisches Institut, Bonn, 53115, Germany) ; Koivuniemi, J.H. (Universität Bochum, Institut für Experimentalphysik, Bochum, 44780, Germany) (University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL, 61801-3080, USA) ; Kolosov, V.N. (State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, Protvino, 142281, Russia) ; Kondo, K. (Yamagata University, Yamagata, 992-8510, Japan) ; Konorov, I. (Lebedev Physical Institute, Moscow, 119991, Russia) (Technische Universität München, Physik Dept., Garching, 85748, Germany) ; Konstantinov, V.F. (State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, Protvino, 142281, Russia) ; Kotzinian, A.M. (Torino Section of INFN, Turin, 10125, Italy) ; Kouznetsov, O.M. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Kral, Z. (Czech Technical University in Prague, Prague, 16636, Czech Republic) ; Krämer, M. (Technische Universität München, Physik Dept., Garching, 85748, Germany) ; Krinner, F. (Technische Universität München, Physik Dept., Garching, 85748, Germany) ; Kroumchtein, Z.V. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Kulinich, Y. (University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL, 61801-3080, USA) ; Kunne, F. (IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, 91191, France) ; Kurek, K. (National Centre for Nuclear Research, Warsaw, 00-681, Poland) ; Kurjata, R.P. (Warsaw University of Technology, Institute of Radioelectronics, Warsaw, 00-665, Poland) ; Kveton, A. (Czech Technical University in Prague, Prague, 16636, Czech Republic) ; Lednev, A.A. (State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, Protvino, 142281, Russia) ; Levorato, S. (Trieste Section of INFN, Trieste, 34127, Italy) ; Lian, Y.-S. (Academia Sinica, Institute of Physics, Taipei, 11529, Taiwan) ; Lichtenstadt, J. (Tel Aviv University, School of Physics and Astronomy, Tel Aviv, 69978, Israel) ; Longo, R. (University of Turin, Dept. of Physics, Turin, 10125, Italy) (Torino Section of INFN, Turin, 10125, Italy) ; Lyubovitskij, V.E. (Tomsk Polytechnic University, Tomsk, 634050, Russia) ; Maggiora, A. (Torino Section of INFN, Turin, 10125, Italy) ; Magnon, A. (University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL, 61801-3080, USA) ; Makins, N. (University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL, 61801-3080, USA) ; Makke, N. (Trieste Section of INFN, Trieste, 34127, Italy) ; Mallot, G.K. (CERN, Geneva 23, 1211, Switzerland) ; Mamon, S.A. (Tomsk Polytechnic University, Tomsk, 634050, Russia) ; Marianski, B. (National Centre for Nuclear Research, Warsaw, 00-681, Poland) ; Martin, A. (University of Trieste, Dept. of Physics, Trieste, 34127, Italy) (Trieste Section of INFN, Trieste, 34127, Italy) ; Marzec, J. (Warsaw University of Technology, Institute of Radioelectronics, Warsaw, 00-665, Poland) ; Matoušek, J. (University of Trieste, Dept. of Physics, Trieste, 34127, Italy) (Trieste Section of INFN, Trieste, 34127, Italy) (Charles University in Prague, Faculty of Mathematics and Physics, Prague, 18000, Czech Republic) ; Matsuda, T. (University of Miyazaki, Miyazaki, 889-2192, Japan) ; Meshcheryakov, G.V. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Meyer, M. (University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL, 61801-3080, USA) (IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, 91191, France) ; Meyer, W. (Universität Bochum, Institut für Experimentalphysik, Bochum, 44780, Germany) ; Mikhailov, Yu.V. (State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, Protvino, 142281, Russia) ; Mikhasenko, M. (Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, Bonn, 53115, Germany) ; Mitrofanov, E. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Mitrofanov, N. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Miyachi, Y. (Yamagata University, Yamagata, 992-8510, Japan) ; Moretti, A. (University of Trieste, Dept. of Physics, Trieste, 34127, Italy) ; Nagaytsev, A. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Neyret, D. (IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, 91191, France) ; Nový, J. (Czech Technical University in Prague, Prague, 16636, Czech Republic) (CERN, Geneva 23, 1211, Switzerland) ; Nowak, W.-D. (Universität Mainz, Institut für Kernphysik, Mainz, 55099, Germany) ; Nukazuka, G. (Yamagata University, Yamagata, 992-8510, Japan) ; Nunes, A.S. (LIP, Lisbon, 1000-149, Portugal) ; Olshevsky, A.G. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Orlov, I. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Ostrick, M. (Universität Mainz, Institut für Kernphysik, Mainz, 55099, Germany) ; Panzieri, D. (Torino Section of INFN, Turin, 10125, Italy) ; Parsamyan, B. (University of Turin, Dept. of Physics, Turin, 10125, Italy) (Torino Section of INFN, Turin, 10125, Italy) ; Paul, S. (Technische Universität München, Physik Dept., Garching, 85748, Germany) ; Peng, J.-C. (University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL, 61801-3080, USA) ; Pereira, F. (University of Aveiro, Dept. of Physics, Aveiro, 3810-193, Portugal) ; Pešek, M. (Charles University in Prague, Faculty of Mathematics and Physics, Prague, 18000, Czech Republic) ; Pešková, M. (Charles University in Prague, Faculty of Mathematics and Physics, Prague, 18000, Czech Republic) ; Peshekhonov, D.V. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Pierre, N. (Universität Mainz, Institut für Kernphysik, Mainz, 55099, Germany) (IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, 91191, France) ; Platchkov, S. (IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, 91191, France) ; Pochodzalla, J. (Universität Mainz, Institut für Kernphysik, Mainz, 55099, Germany) ; Polyakov, V.A. (State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, Protvino, 142281, Russia) ; Pretz, J. (Universität Bonn, Physikalisches Institut, Bonn, 53115, Germany) ; Quaresma, M. (LIP, Lisbon, 1000-149, Portugal) ; Quintans, C. (LIP, Lisbon, 1000-149, Portugal) ; Ramos, S. (LIP, Lisbon, 1000-149, Portugal) ; Regali, C. (Universität Freiburg, Physikalisches Institut, Freiburg, 79104, Germany) ; Reicherz, G. (Universität Bochum, Institut für Experimentalphysik, Bochum, 44780, Germany) ; Riedl, C. (University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL, 61801-3080, USA) ; Ryabchikov, D.I. (State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, Protvino, 142281, Russia) (Technische Universität München, Physik Dept., Garching, 85748, Germany) ; Rybnikov, A. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Rychter, A. (Warsaw University of Technology, Institute of Radioelectronics, Warsaw, 00-665, Poland) ; Salac, R. (Czech Technical University in Prague, Prague, 16636, Czech Republic) ; Samoylenko, V.D. (State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, Protvino, 142281, Russia) ; Sandacz, A. (National Centre for Nuclear Research, Warsaw, 00-681, Poland) ; Sarkar, S. (Matrivani Institute of Experimental Research & Education, Calcutta, 700 030, India) ; Savin, I.A. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Sawada, T. (Academia Sinica, Institute of Physics, Taipei, 11529, Taiwan) ; Sbrizzai, G. (University of Trieste, Dept. of Physics, Trieste, 34127, Italy) (Trieste Section of INFN, Trieste, 34127, Italy) ; Schiavon, P. (University of Trieste, Dept. of Physics, Trieste, 34127, Italy) (Trieste Section of INFN, Trieste, 34127, Italy) ; Schmieden, H. (Universität Bonn, Physikalisches Institut, Bonn, 53115, Germany) ; Seder, E. (IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, 91191, France) ; Selyunin, A. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Silva, L. (LIP, Lisbon, 1000-149, Portugal) ; Sinha, L. (Matrivani Institute of Experimental Research & Education, Calcutta, 700 030, India) ; Sirtl, S. (Universität Freiburg, Physikalisches Institut, Freiburg, 79104, Germany) ; Slunecka, M. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Smolik, J. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Sozzi, F. (Trieste Section of INFN, Trieste, 34127, Italy) ; Srnka, A. (Institute of Scientific Instruments, AS CR, Brno, 61264, Czech Republic) ; Steffen, D. (CERN, Geneva 23, 1211, Switzerland) (Technische Universität München, Physik Dept., Garching, 85748, Germany) ; Stolarski, M. (LIP, Lisbon, 1000-149, Portugal) ; Subrt, O. (CERN, Geneva 23, 1211, Switzerland) (Czech Technical University in Prague, Prague, 16636, Czech Republic) ; Sulc, M. (Technical University in Liberec, Liberec, 46117, Czech Republic) ; Suzuki, H. (Yamagata University, Yamagata, 992-8510, Japan) ; Szabelski, A. (University of Trieste, Dept. of Physics, Trieste, 34127, Italy) (Trieste Section of INFN, Trieste, 34127, Italy) (National Centre for Nuclear Research, Warsaw, 00-681, Poland) ; Szameitat, T. (Universität Freiburg, Physikalisches Institut, Freiburg, 79104, Germany) ; Sznajder, P. (National Centre for Nuclear Research, Warsaw, 00-681, Poland) ; Tasevsky, M. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Tessaro, S. (Trieste Section of INFN, Trieste, 34127, Italy) ; Tessarotto, F. (Trieste Section of INFN, Trieste, 34127, Italy) ; Thiel, A. (Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, Bonn, 53115, Germany) ; Tomsa, J. (Charles University in Prague, Faculty of Mathematics and Physics, Prague, 18000, Czech Republic) ; Tosello, F. (Torino Section of INFN, Turin, 10125, Italy) ; Tskhay, V. (Lebedev Physical Institute, Moscow, 119991, Russia) ; Uhl, S. (Technische Universität München, Physik Dept., Garching, 85748, Germany) ; Vasilishin, B.I. (Tomsk Polytechnic University, Tomsk, 634050, Russia) ; Vauth, A. (CERN, Geneva 23, 1211, Switzerland) ; Veit, B.M. (Universität Mainz, Institut für Kernphysik, Mainz, 55099, Germany) ; Veloso, J. (University of Aveiro, Dept. of Physics, Aveiro, 3810-193, Portugal) ; Vidon, A. (IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, 91191, France) ; Virius, M. (Czech Technical University in Prague, Prague, 16636, Czech Republic) ; Wagner, M. (Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, Bonn, 53115, Germany) ; Wallner, S. (Technische Universität München, Physik Dept., Garching, 85748, Germany) ; Wilfert, M. (Universität Mainz, Institut für Kernphysik, Mainz, 55099, Germany) ; Zaremba, K. (Warsaw University of Technology, Institute of Radioelectronics, Warsaw, 00-665, Poland) ; Zavada, P. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Zavertyaev, M. (Lebedev Physical Institute, Moscow, 119991, Russia) ; Zhao, Y. (Trieste Section of INFN, Trieste, 34127, Italy) ; Zemlyanichkina, E. (Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia) ; Ziembicki, M. (Warsaw University of Technology, Institute of Radioelectronics, Warsaw, 00-665, Poland)

27 December 2018

Abstract: The transverse spin asymmetries measured in semi-inclusive leptoproduction of hadrons, when weighted with the hadron transverse momentum PT , allow for the extraction of important transverse-momentum-dependent distribution functions. In particular, the weighted Sivers asymmetries provide direct information on the Sivers function, which is a leading-twist distribution that arises from a correlation between the transverse momentum of an unpolarised quark in a transversely polarised nucleon and the spin of the nucleon. Using the high-statistics data collected by the COMPASS Collaboration in 2010 with a transversely polarised proton target, we have evaluated two types of PT -weighted Sivers asymmetries, which are both proportional to the product of the first transverse moment of the Sivers function and of the fragmentation function. The results are compared to the standard unweighted Sivers asymmetries and used to extract the first transverse moments of the Sivers distributions for u and d quarks.


Published in: Nuclear Physics B (2018)
Published by: Elsevier
DOI: 10.1016/j.nuclphysb.2018.12.024
License: CC-BY-3.0



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