Physics Letters B (Jun 2018)
Longitudinal double-spin asymmetry A1p and spin-dependent structure function g1p of the proton at small values of x and Q2
- M. Aghasyan,
- M.G. Alexeev,
- G.D. Alexeev,
- A. Amoroso,
- V. Andrieux,
- N.V. Anfimov,
- V. Anosov,
- A. Antoshkin,
- K. Augsten,
- W. Augustyniak,
- A. Austregesilo,
- C.D.R. Azevedo,
- B. Badełek,
- F. Balestra,
- M. Ball,
- J. Barth,
- R. Beck,
- Y. Bedfer,
- J. Bernhard,
- K. Bicker,
- E.R. Bielert,
- R. Birsa,
- M. Bodlak,
- P. Bordalo,
- F. Bradamante,
- A. Bressan,
- M. Büchele,
- V.E. Burtsev,
- L. Capozza,
- W.-C. Chang,
- C. Chatterjee,
- M. Chiosso,
- I. Choi,
- A.G. Chumakov,
- S.-U. Chung,
- A. Cicuttin,
- M.L. Crespo,
- S. Dalla Torre,
- S.S. Dasgupta,
- S. Dasgupta,
- O.Yu. Denisov,
- L. Dhara,
- S.V. Donskov,
- N. Doshita,
- Ch. Dreisbach,
- W. Dünnweber,
- R.R. Dusaev,
- M. Dziewiecki,
- A. Efremov,
- P.D. Eversheim,
- M. Faessler,
- A. Ferrero,
- M. Finger,
- M. Finger, jr.,
- H. Fischer,
- C. Franco,
- N. du Fresne von Hohenesche,
- J.M. Friedrich,
- V. Frolov,
- E. Fuchey,
- F. Gautheron,
- O.P. Gavrichtchouk,
- S. Gerassimov,
- J. Giarra,
- F. Giordano,
- I. Gnesi,
- M. Gorzellik,
- A. Grasso,
- A. Gridin,
- M. Grosse Perdekamp,
- B. Grube,
- T. Grussenmeyer,
- A. Guskov,
- D. Hahne,
- G. Hamar,
- D. von Harrach,
- F.H. Heinsius,
- R. Heitz,
- F. Herrmann,
- N. Horikawa,
- N. d'Hose,
- C.-Y. Hsieh,
- S. Huber,
- S. Ishimoto,
- A. Ivanov,
- T. Iwata,
- V. Jary,
- R. Joosten,
- P. Jörg,
- E. Kabuß,
- A. Kerbizi,
- B. Ketzer,
- G.V. Khaustov,
- Yu.A. Khokhlov,
- Yu. Kisselev,
- F. Klein,
- J.H. Koivuniemi,
- V.N. Kolosov,
- K. Kondo,
- K. Königsmann,
- I. Konorov,
- V.F. Konstantinov,
- A.M. Kotzinian,
- O.M. Kouznetsov,
- Z. Kral,
- M. Krämer,
- P. Kremser,
- F. Krinner,
- Z.V. Kroumchtein,
- Y. Kulinich,
- F. Kunne,
- K. Kurek,
- R.P. Kurjata,
- I.I. Kuznetsov,
- A. Kveton,
- A.A. Lednev,
- E.A. Levchenko,
- M. Levillain,
- S. Levorato,
- Y.-S. Lian,
- J. Lichtenstadt,
- R. Longo,
- V.E. Lyubovitskij,
- A. Maggiora,
- A. Magnon,
- N. Makins,
- N. Makke,
- G.K. Mallot,
- S.A. Mamon,
- B. Marianski,
- A. Martin,
- J. Marzec,
- J. Matoušek,
- H. Matsuda,
- T. Matsuda,
- G.V. Meshcheryakov,
- M. Meyer,
- W. Meyer,
- Yu.V. Mikhailov,
- M. Mikhasenko,
- E. Mitrofanov,
- N. Mitrofanov,
- Y. Miyachi,
- A. Moretti,
- A. Nagaytsev,
- F. Nerling,
- D. Neyret,
- J. Nový,
- W.-D. Nowak,
- G. Nukazuka,
- A.S. Nunes,
- A.G. Olshevsky,
- I. Orlov,
- M. Ostrick,
- D. Panzieri,
- B. Parsamyan,
- S. Paul,
- J.-C. Peng,
- F. Pereira,
- M. Pešek,
- M. Pešková,
- D.V. Peshekhonov,
- N. Pierre,
- S. Platchkov,
- J. Pochodzalla,
- V.A. Polyakov,
- J. Pretz,
- M. Quaresma,
- C. Quintans,
- S. Ramos,
- C. Regali,
- G. Reicherz,
- C. Riedl,
- N.S. Rogacheva,
- D.I. Ryabchikov,
- A. Rybnikov,
- A. Rychter,
- R. Salac,
- V.D. Samoylenko,
- A. Sandacz,
- C. Santos,
- S. Sarkar,
- I.A. Savin,
- T. Sawada,
- G. Sbrizzai,
- P. Schiavon,
- K. Schmidt,
- H. Schmieden,
- K. Schönning,
- E. Seder,
- A. Selyunin,
- L. Silva,
- L. Sinha,
- S. Sirtl,
- M. Slunecka,
- J. Smolik,
- A. Srnka,
- D. Steffen,
- M. Stolarski,
- O. Subrt,
- M. Sulc,
- H. Suzuki,
- A. Szabelski,
- T. Szameitat,
- P. Sznajder,
- M. Tasevsky,
- S. Tessaro,
- F. Tessarotto,
- A. Thiel,
- J. Tomsa,
- F. Tosello,
- V. Tskhay,
- S. Uhl,
- B.I. Vasilishin,
- A. Vauth,
- J. Veloso,
- A. Vidon,
- M. Virius,
- S. Wallner,
- T. Weisrock,
- M. Wilfert,
- R. Windmolders,
- J. ter Wolbeek,
- K. Zaremba,
- P. Zavada,
- M. Zavertyaev,
- E. Zemlyanichkina,
- M. Ziembicki
Affiliations
- M. Aghasyan
- Trieste Section of INFN, 34127 Trieste, Italy
- M.G. Alexeev
- University of Turin, Dept. of Physics, 10125 Turin, Italy
- G.D. Alexeev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- A. Amoroso
- University of Turin, Dept. of Physics, 10125 Turin, Italy; Torino Section of INFN, 10125 Turin, Italy
- V. Andrieux
- University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL 61801-3080, USA2727 Supported by the National Science Foundation, Grant no. PHY-1506416 (USA).; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France19
- N.V. Anfimov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- V. Anosov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- A. Antoshkin
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- K. Augsten
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.; Czech Technical University in Prague, 16636 Prague, Czech Republic20
- W. Augustyniak
- National Centre for Nuclear Research, 00-681 Warsaw, Poland2828 Supported by NCN, Grant 2015/18/M/ST2/00550 (Poland).
- A. Austregesilo
- Technische Universität München, Physik Dept., 85748 Garching, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).
- C.D.R. Azevedo
- University of Aveiro, Dept. of Physics, 3810-193 Aveiro, Portugal
- B. Badełek
- University of Warsaw, Faculty of Physics, 02-093 Warsaw, Poland28
- F. Balestra
- University of Turin, Dept. of Physics, 10125 Turin, Italy; Torino Section of INFN, 10125 Turin, Italy
- M. Ball
- Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany18
- J. Barth
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany18
- R. Beck
- Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany18
- Y. Bedfer
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France19
- J. Bernhard
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany18; CERN, 1211 Geneva 23, Switzerland
- K. Bicker
- Technische Universität München, Physik Dept., 85748 Garching, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).; CERN, 1211 Geneva 23, Switzerland
- E.R. Bielert
- CERN, 1211 Geneva 23, Switzerland
- R. Birsa
- Trieste Section of INFN, 34127 Trieste, Italy
- M. Bodlak
- Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic20
- P. Bordalo
- LIP, 1000-149 Lisbon, Portugal2222 Supported by FCT–Fundação para a Ciência e a Tecnologia, COMPETE and QREN, Grants CERN/FP 116376/2010, 123600/2011 and CERN/FIS-NUC/0017/2015 (Portugal).
- F. Bradamante
- University of Trieste, Dept. of Physics, 34127 Trieste, Italy; Trieste Section of INFN, 34127 Trieste, Italy
- A. Bressan
- University of Trieste, Dept. of Physics, 34127 Trieste, Italy; Trieste Section of INFN, 34127 Trieste, Italy
- M. Büchele
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany1819
- V.E. Burtsev
- Tomsk Polytechnic University, 634050 Tomsk, Russia2626 Supported by the Russian Federation program “Nauka” (Contract No. 0.1764.GZB.2017) (Russia).
- L. Capozza
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France19
- W.-C. Chang
- Academia Sinica, Institute of Physics, Taipei 11529, Taiwan2424 Supported by the Ministry of Science and Technology (Taiwan).
- C. Chatterjee
- Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India2121 Supported by SAIL (CSR) and B.Sen fund (India).
- M. Chiosso
- University of Turin, Dept. of Physics, 10125 Turin, Italy; Torino Section of INFN, 10125 Turin, Italy
- I. Choi
- University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL 61801-3080, USA2727 Supported by the National Science Foundation, Grant no. PHY-1506416 (USA).
- A.G. Chumakov
- Tomsk Polytechnic University, 634050 Tomsk, Russia2626 Supported by the Russian Federation program “Nauka” (Contract No. 0.1764.GZB.2017) (Russia).
- S.-U. Chung
- Technische Universität München, Physik Dept., 85748 Garching, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).
- A. Cicuttin
- Trieste Section of INFN, 34127 Trieste, Italy
- M.L. Crespo
- Trieste Section of INFN, 34127 Trieste, Italy
- S. Dalla Torre
- Trieste Section of INFN, 34127 Trieste, Italy
- S.S. Dasgupta
- Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India2121 Supported by SAIL (CSR) and B.Sen fund (India).
- S. Dasgupta
- University of Trieste, Dept. of Physics, 34127 Trieste, Italy; Trieste Section of INFN, 34127 Trieste, Italy
- O.Yu. Denisov
- Torino Section of INFN, 10125 Turin, Italy; Corresponding authors.
- L. Dhara
- Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India2121 Supported by SAIL (CSR) and B.Sen fund (India).
- S.V. Donskov
- State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia
- N. Doshita
- Yamagata University, Yamagata 992-8510, Japan23
- Ch. Dreisbach
- Technische Universität München, Physik Dept., 85748 Garching, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).
- W. Dünnweber
- University of Aveiro, Dept. of Physics, 3810-193 Aveiro, Portugal; Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany1818 Supported by BMBF–Bundesministerium für Bildung und Forschung (Germany).1919 Supported by FP7, HadronPhysics3, Grant 283286 (European Union).; Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany18; Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany18; Institute of Scientific Instruments, AS CR, 61264 Brno, Czech Republic2020 Supported by MEYS, Grant LG13031 (Czech Republic).; Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India2121 Supported by SAIL (CSR) and B.Sen fund (India).; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany1819; CERN, 1211 Geneva 23, Switzerland; Technical University in Liberec, 46117 Liberec, Czech Republic20; LIP, 1000-149 Lisbon, Portugal2222 Supported by FCT–Fundação para a Ciência e a 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, Germany18; University of Miyazaki, Miyazaki 889-2192, Japan2323 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, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).; Nagoya University, 464 Nagoya, Japan23; Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic20; Czech Technical University in Prague, 16636 Prague, Czech Republic20; 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, France19; Academia Sinica, Institute of Physics, Taipei 11529, Taiwan2424 Supported by the Ministry of Science and Technology (Taiwan).; Tel Aviv University, School of Physics and Astronomy, 69978 Tel Aviv, Israel2525 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, Russia2626 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, USA2727 Supported by the National Science Foundation, Grant no. PHY-1506416 (USA).; National Centre for Nuclear Research, 00-681 Warsaw, Poland2828 Supported by NCN, Grant 2015/18/M/ST2/00550 (Poland).; University of Warsaw, Faculty of Physics, 02-093 Warsaw, Poland28; Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland28; Yamagata University, Yamagata 992-8510, Japan23
- R.R. Dusaev
- Tomsk Polytechnic University, 634050 Tomsk, Russia2626 Supported by the Russian Federation program “Nauka” (Contract No. 0.1764.GZB.2017) (Russia).
- M. Dziewiecki
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland28
- A. Efremov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- P.D. Eversheim
- Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany18
- M. Faessler
- University of Aveiro, Dept. of Physics, 3810-193 Aveiro, Portugal; Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany1818 Supported by BMBF–Bundesministerium für Bildung und Forschung (Germany).1919 Supported by FP7, HadronPhysics3, Grant 283286 (European Union).; Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany18; Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany18; Institute of Scientific Instruments, AS CR, 61264 Brno, Czech Republic2020 Supported by MEYS, Grant LG13031 (Czech Republic).; Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India2121 Supported by SAIL (CSR) and B.Sen fund (India).; Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.; Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany1819; CERN, 1211 Geneva 23, Switzerland; Technical University in Liberec, 46117 Liberec, Czech Republic20; LIP, 1000-149 Lisbon, Portugal2222 Supported by FCT–Fundação para a Ciência e a 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, Germany18; University of Miyazaki, Miyazaki 889-2192, Japan2323 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, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).; Nagoya University, 464 Nagoya, Japan23; Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic20; Czech Technical University in Prague, 16636 Prague, Czech Republic20; 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, France19; Academia Sinica, Institute of Physics, Taipei 11529, Taiwan2424 Supported by the Ministry of Science and Technology (Taiwan).; Tel Aviv University, School of Physics and Astronomy, 69978 Tel Aviv, Israel2525 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, Russia2626 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, USA2727 Supported by the National Science Foundation, Grant no. PHY-1506416 (USA).; National Centre for Nuclear Research, 00-681 Warsaw, Poland2828 Supported by NCN, Grant 2015/18/M/ST2/00550 (Poland).; University of Warsaw, Faculty of Physics, 02-093 Warsaw, Poland28; Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland28; Yamagata University, Yamagata 992-8510, Japan23
- A. Ferrero
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France19
- M. Finger
- Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic20
- M. Finger, jr.
- Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic20
- H. Fischer
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany1819
- C. Franco
- LIP, 1000-149 Lisbon, Portugal2222 Supported by FCT–Fundação para a Ciência e a Tecnologia, COMPETE and QREN, Grants CERN/FP 116376/2010, 123600/2011 and CERN/FIS-NUC/0017/2015 (Portugal).
- N. du Fresne von Hohenesche
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany18; CERN, 1211 Geneva 23, Switzerland
- J.M. Friedrich
- Technische Universität München, Physik Dept., 85748 Garching, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).; Corresponding authors.
- V. Frolov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.; CERN, 1211 Geneva 23, Switzerland
- E. Fuchey
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France19
- F. Gautheron
- Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany1818 Supported by BMBF–Bundesministerium für Bildung und Forschung (Germany).1919 Supported by FP7, HadronPhysics3, Grant 283286 (European Union).
- O.P. Gavrichtchouk
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- S. Gerassimov
- Lebedev Physical Institute, 119991 Moscow, Russia; Technische Universität München, Physik Dept., 85748 Garching, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).
- J. Giarra
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany18
- F. Giordano
- University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL 61801-3080, USA2727 Supported by the National Science Foundation, Grant no. PHY-1506416 (USA).
- I. Gnesi
- University of Turin, Dept. of Physics, 10125 Turin, Italy; Torino Section of INFN, 10125 Turin, Italy
- M. Gorzellik
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany1819
- A. Grasso
- University of Turin, Dept. of Physics, 10125 Turin, Italy; Torino Section of INFN, 10125 Turin, Italy
- A. Gridin
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- M. Grosse Perdekamp
- University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL 61801-3080, USA2727 Supported by the National Science Foundation, Grant no. PHY-1506416 (USA).
- B. Grube
- Technische Universität München, Physik Dept., 85748 Garching, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).
- T. Grussenmeyer
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany1819
- A. Guskov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- D. Hahne
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany18
- G. Hamar
- Trieste Section of INFN, 34127 Trieste, Italy
- D. von Harrach
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany18
- F.H. Heinsius
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany1819
- R. Heitz
- University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL 61801-3080, USA2727 Supported by the National Science Foundation, Grant no. PHY-1506416 (USA).
- F. Herrmann
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany1819
- N. Horikawa
- Nagoya University, 464 Nagoya, Japan23
- N. d'Hose
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France19
- C.-Y. Hsieh
- Academia Sinica, Institute of Physics, Taipei 11529, Taiwan2424 Supported by the Ministry of Science and Technology (Taiwan).
- S. Huber
- Technische Universität München, Physik Dept., 85748 Garching, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).
- S. Ishimoto
- Yamagata University, Yamagata 992-8510, Japan23
- A. Ivanov
- University of Turin, Dept. of Physics, 10125 Turin, Italy; Torino Section of INFN, 10125 Turin, Italy
- T. Iwata
- Yamagata University, Yamagata 992-8510, Japan23
- V. Jary
- Czech Technical University in Prague, 16636 Prague, Czech Republic20
- R. Joosten
- Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany18
- P. Jörg
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany1819
- E. Kabuß
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany18
- A. Kerbizi
- University of Trieste, Dept. of Physics, 34127 Trieste, Italy; Trieste Section of INFN, 34127 Trieste, Italy
- B. Ketzer
- Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany18
- G.V. Khaustov
- State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia
- Yu.A. Khokhlov
- State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia
- Yu. Kisselev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- F. Klein
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany18
- J.H. Koivuniemi
- Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany1818 Supported by BMBF–Bundesministerium für Bildung und Forschung (Germany).1919 Supported by FP7, HadronPhysics3, Grant 283286 (European Union).; University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL 61801-3080, USA2727 Supported by the National Science Foundation, Grant no. PHY-1506416 (USA).
- V.N. Kolosov
- State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia
- K. Kondo
- Yamagata University, Yamagata 992-8510, Japan23
- K. Königsmann
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany1819
- I. Konorov
- Lebedev Physical Institute, 119991 Moscow, Russia; Technische Universität München, Physik Dept., 85748 Garching, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).
- V.F. Konstantinov
- State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia
- A.M. Kotzinian
- Torino Section of INFN, 10125 Turin, Italy
- O.M. Kouznetsov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- Z. Kral
- Czech Technical University in Prague, 16636 Prague, Czech Republic20
- M. Krämer
- Technische Universität München, Physik Dept., 85748 Garching, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).
- P. Kremser
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany1819
- F. Krinner
- Technische Universität München, Physik Dept., 85748 Garching, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).
- Z.V. Kroumchtein
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- Y. Kulinich
- University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL 61801-3080, USA2727 Supported by the National Science Foundation, Grant no. PHY-1506416 (USA).
- F. Kunne
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France19
- K. Kurek
- National Centre for Nuclear Research, 00-681 Warsaw, Poland2828 Supported by NCN, Grant 2015/18/M/ST2/00550 (Poland).
- R.P. Kurjata
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland28
- I.I. Kuznetsov
- Tomsk Polytechnic University, 634050 Tomsk, Russia2626 Supported by the Russian Federation program “Nauka” (Contract No. 0.1764.GZB.2017) (Russia).
- A. Kveton
- Czech Technical University in Prague, 16636 Prague, Czech Republic20
- A.A. Lednev
- State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia
- E.A. Levchenko
- Tomsk Polytechnic University, 634050 Tomsk, Russia2626 Supported by the Russian Federation program “Nauka” (Contract No. 0.1764.GZB.2017) (Russia).
- M. Levillain
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France19
- S. Levorato
- Trieste Section of INFN, 34127 Trieste, Italy
- Y.-S. Lian
- Academia Sinica, Institute of Physics, Taipei 11529, Taiwan2424 Supported by the Ministry of Science and Technology (Taiwan).
- J. Lichtenstadt
- Tel Aviv University, School of Physics and Astronomy, 69978 Tel Aviv, Israel2525 Supported by the Israel Academy of Sciences and Humanities (Israel).
- R. Longo
- University of Turin, Dept. of Physics, 10125 Turin, Italy; Torino Section of INFN, 10125 Turin, Italy
- V.E. Lyubovitskij
- Tomsk Polytechnic University, 634050 Tomsk, Russia2626 Supported by the Russian Federation program “Nauka” (Contract No. 0.1764.GZB.2017) (Russia).
- A. Maggiora
- Torino Section of INFN, 10125 Turin, Italy
- A. Magnon
- University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL 61801-3080, USA2727 Supported by the National Science Foundation, Grant no. PHY-1506416 (USA).
- N. Makins
- University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL 61801-3080, USA2727 Supported by the National Science Foundation, Grant no. PHY-1506416 (USA).
- N. Makke
- Trieste Section of INFN, 34127 Trieste, Italy
- G.K. Mallot
- CERN, 1211 Geneva 23, Switzerland
- S.A. Mamon
- Tomsk Polytechnic University, 634050 Tomsk, Russia2626 Supported by the Russian Federation program “Nauka” (Contract No. 0.1764.GZB.2017) (Russia).
- B. Marianski
- National Centre for Nuclear Research, 00-681 Warsaw, Poland2828 Supported by NCN, Grant 2015/18/M/ST2/00550 (Poland).
- A. Martin
- University of Trieste, Dept. of Physics, 34127 Trieste, Italy; Trieste Section of INFN, 34127 Trieste, Italy
- J. Marzec
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland28
- J. Matoušek
- University of Trieste, Dept. of Physics, 34127 Trieste, Italy; Trieste Section of INFN, 34127 Trieste, Italy; Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic20
- H. Matsuda
- Yamagata University, Yamagata 992-8510, Japan23
- T. Matsuda
- University of Miyazaki, Miyazaki 889-2192, Japan2323 Supported by MEXT and JSPS, Grants 18002006, 20540299, 18540281 and 26247032, the Daiko and Yamada Foundations (Japan).
- G.V. Meshcheryakov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- M. Meyer
- University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL 61801-3080, USA2727 Supported by the National Science Foundation, Grant no. PHY-1506416 (USA).; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France19
- W. Meyer
- Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany1818 Supported by BMBF–Bundesministerium für Bildung und Forschung (Germany).1919 Supported by FP7, HadronPhysics3, Grant 283286 (European Union).
- Yu.V. Mikhailov
- State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia
- M. Mikhasenko
- Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany18
- E. Mitrofanov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- N. Mitrofanov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- Y. Miyachi
- Yamagata University, Yamagata 992-8510, Japan23
- A. Moretti
- University of Trieste, Dept. of Physics, 34127 Trieste, Italy; Trieste Section of INFN, 34127 Trieste, Italy
- A. Nagaytsev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- F. Nerling
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany18
- D. Neyret
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France19
- J. Nový
- Czech Technical University in Prague, 16636 Prague, Czech Republic20; CERN, 1211 Geneva 23, Switzerland
- W.-D. Nowak
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany18
- G. Nukazuka
- Yamagata University, Yamagata 992-8510, Japan23
- A.S. Nunes
- LIP, 1000-149 Lisbon, Portugal2222 Supported by FCT–Fundação para a Ciência e a Tecnologia, COMPETE and QREN, Grants CERN/FP 116376/2010, 123600/2011 and CERN/FIS-NUC/0017/2015 (Portugal).; Corresponding authors.
- A.G. Olshevsky
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- I. Orlov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- M. Ostrick
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany18
- D. Panzieri
- Torino Section of INFN, 10125 Turin, Italy
- B. Parsamyan
- University of Turin, Dept. of Physics, 10125 Turin, Italy; Torino Section of INFN, 10125 Turin, Italy
- S. Paul
- Technische Universität München, Physik Dept., 85748 Garching, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).
- J.-C. Peng
- University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL 61801-3080, USA2727 Supported by the National Science Foundation, Grant no. PHY-1506416 (USA).
- F. Pereira
- University of Aveiro, Dept. of Physics, 3810-193 Aveiro, Portugal
- M. Pešek
- Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic20
- M. Pešková
- Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic20
- D.V. Peshekhonov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- N. Pierre
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany18; IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France19
- S. Platchkov
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France19
- J. Pochodzalla
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany18
- V.A. Polyakov
- State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia
- J. Pretz
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany18
- M. Quaresma
- LIP, 1000-149 Lisbon, Portugal2222 Supported by FCT–Fundação para a Ciência e a Tecnologia, COMPETE and QREN, Grants CERN/FP 116376/2010, 123600/2011 and CERN/FIS-NUC/0017/2015 (Portugal).
- C. Quintans
- LIP, 1000-149 Lisbon, Portugal2222 Supported by FCT–Fundação para a Ciência e a Tecnologia, COMPETE and QREN, Grants CERN/FP 116376/2010, 123600/2011 and CERN/FIS-NUC/0017/2015 (Portugal).
- S. Ramos
- LIP, 1000-149 Lisbon, Portugal2222 Supported by FCT–Fundação para a Ciência e a Tecnologia, COMPETE and QREN, Grants CERN/FP 116376/2010, 123600/2011 and CERN/FIS-NUC/0017/2015 (Portugal).
- C. Regali
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany1819
- G. Reicherz
- Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany1818 Supported by BMBF–Bundesministerium für Bildung und Forschung (Germany).1919 Supported by FP7, HadronPhysics3, Grant 283286 (European Union).
- C. Riedl
- University of Illinois at Urbana-Champaign, Dept. of Physics, Urbana, IL 61801-3080, USA2727 Supported by the National Science Foundation, Grant no. PHY-1506416 (USA).
- N.S. Rogacheva
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- D.I. Ryabchikov
- State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia; Technische Universität München, Physik Dept., 85748 Garching, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).
- A. Rybnikov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- A. Rychter
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland28
- R. Salac
- Czech Technical University in Prague, 16636 Prague, Czech Republic20
- V.D. Samoylenko
- State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia
- A. Sandacz
- National Centre for Nuclear Research, 00-681 Warsaw, Poland2828 Supported by NCN, Grant 2015/18/M/ST2/00550 (Poland).
- C. Santos
- Trieste Section of INFN, 34127 Trieste, Italy
- S. Sarkar
- Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India2121 Supported by SAIL (CSR) and B.Sen fund (India).
- I.A. Savin
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- T. Sawada
- Academia Sinica, Institute of Physics, Taipei 11529, Taiwan2424 Supported by the Ministry of Science and Technology (Taiwan).
- G. Sbrizzai
- University of Trieste, Dept. of Physics, 34127 Trieste, Italy; Trieste Section of INFN, 34127 Trieste, Italy
- P. Schiavon
- University of Trieste, Dept. of Physics, 34127 Trieste, Italy; Trieste Section of INFN, 34127 Trieste, Italy
- K. Schmidt
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany1819
- H. Schmieden
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany18
- K. Schönning
- CERN, 1211 Geneva 23, Switzerland
- E. Seder
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France19
- A. Selyunin
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- L. Silva
- LIP, 1000-149 Lisbon, Portugal2222 Supported by FCT–Fundação para a Ciência e a Tecnologia, COMPETE and QREN, Grants CERN/FP 116376/2010, 123600/2011 and CERN/FIS-NUC/0017/2015 (Portugal).
- L. Sinha
- Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India2121 Supported by SAIL (CSR) and B.Sen fund (India).
- S. Sirtl
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany1819
- M. Slunecka
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- J. Smolik
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- A. Srnka
- Institute of Scientific Instruments, AS CR, 61264 Brno, Czech Republic2020 Supported by MEYS, Grant LG13031 (Czech Republic).
- D. Steffen
- CERN, 1211 Geneva 23, Switzerland; Technische Universität München, Physik Dept., 85748 Garching, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).
- M. Stolarski
- LIP, 1000-149 Lisbon, Portugal2222 Supported by FCT–Fundação para a Ciência e a Tecnologia, COMPETE and QREN, Grants CERN/FP 116376/2010, 123600/2011 and CERN/FIS-NUC/0017/2015 (Portugal).
- O. Subrt
- CERN, 1211 Geneva 23, Switzerland; Czech Technical University in Prague, 16636 Prague, Czech Republic20
- M. Sulc
- Technical University in Liberec, 46117 Liberec, Czech Republic20
- H. Suzuki
- Yamagata University, Yamagata 992-8510, Japan23
- A. Szabelski
- University of Trieste, Dept. of Physics, 34127 Trieste, Italy; Trieste Section of INFN, 34127 Trieste, Italy; National Centre for Nuclear Research, 00-681 Warsaw, Poland2828 Supported by NCN, Grant 2015/18/M/ST2/00550 (Poland).
- T. Szameitat
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany1819
- P. Sznajder
- National Centre for Nuclear Research, 00-681 Warsaw, Poland2828 Supported by NCN, Grant 2015/18/M/ST2/00550 (Poland).
- M. Tasevsky
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- S. Tessaro
- Trieste Section of INFN, 34127 Trieste, Italy
- F. Tessarotto
- Trieste Section of INFN, 34127 Trieste, Italy
- A. Thiel
- Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany18
- J. Tomsa
- Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic20
- F. Tosello
- Torino Section of INFN, 10125 Turin, Italy
- V. Tskhay
- Lebedev Physical Institute, 119991 Moscow, Russia
- S. Uhl
- Technische Universität München, Physik Dept., 85748 Garching, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).
- B.I. Vasilishin
- Tomsk Polytechnic University, 634050 Tomsk, Russia2626 Supported by the Russian Federation program “Nauka” (Contract No. 0.1764.GZB.2017) (Russia).
- A. Vauth
- CERN, 1211 Geneva 23, Switzerland
- J. Veloso
- University of Aveiro, Dept. of Physics, 3810-193 Aveiro, Portugal
- A. Vidon
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France19
- M. Virius
- Czech Technical University in Prague, 16636 Prague, Czech Republic20
- S. Wallner
- Technische Universität München, Physik Dept., 85748 Garching, Germany1844 Supported by the DFG cluster of excellence ‘Origin and Structure of the Universe’ (www.universe-cluster.de) (Germany).
- T. Weisrock
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany18
- M. Wilfert
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany18
- R. Windmolders
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany18
- J. ter Wolbeek
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany1819
- K. Zaremba
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland28
- P. Zavada
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- M. Zavertyaev
- Lebedev Physical Institute, 119991 Moscow, Russia
- E. Zemlyanichkina
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia55 Supported by CERN–RFBR Grant 12-02-91500.
- M. Ziembicki
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland28
- Journal volume & issue
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Vol. 781
pp. 464 – 472
Abstract
We present a precise measurement of the proton longitudinal double-spin asymmetry A1p and the proton spin-dependent structure function g1p at photon virtualities 0.006(GeV/c)2<Q2<1(GeV/c)2 in the Bjorken x range of 4×10−5<x<4×10−2. The results are based on data collected by the COMPASS Collaboration at CERN using muon beam energies of 160GeV and 200GeV. The statistical precision is more than tenfold better than that of the previous measurement in this region. In the whole range of x, the measured values of A1p and g1p are found to be positive. It is for the first time that spin effects are found at such low values of x. Keywords: Inelastic muon scattering, Spin structure function, A1, g1, Low x, Low Q2
