Physics Letters B (Feb 2016)
The spin structure function g1p of the proton and a test of the Bjorken sum rule
- C. Adolph,
- R. Akhunzyanov,
- M.G. Alexeev,
- G.D. Alexeev,
- A. Amoroso,
- V. Andrieux,
- V. Anosov,
- A. Austregesilo,
- C. Azevedo,
- B. Badełek,
- F. Balestra,
- J. Barth,
- G. Baum,
- R. Beck,
- Y. Bedfer,
- J. Bernhard,
- K. Bicker,
- E.R. Bielert,
- R. Birsa,
- J. Bisplinghoff,
- M. Bodlak,
- M. Boer,
- P. Bordalo,
- F. Bradamante,
- C. Braun,
- A. Bressan,
- M. Büchele,
- E. Burtin,
- L. Capozza,
- W.-C. Chang,
- M. Chiosso,
- I. Choi,
- S.U. Chung,
- A. Cicuttin,
- M.L. Crespo,
- Q. Curiel,
- S. Dalla Torre,
- S.S. Dasgupta,
- S. Dasgupta,
- O.Yu. Denisov,
- L. Dhara,
- S.V. Donskov,
- N. Doshita,
- V. Duic,
- M. Dziewiecki,
- A. Efremov,
- P.D. Eversheim,
- W. Eyrich,
- 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,
- F. Giordano,
- I. Gnesi,
- M. Gorzellik,
- S. Grabmüller,
- A. Grasso,
- M. Grosse-Perdekamp,
- B. Grube,
- T. Grussenmeyer,
- A. Guskov,
- F. Haas,
- D. Hahne,
- D. von Harrach,
- R. Hashimoto,
- F.H. Heinsius,
- F. Herrmann,
- F. Hinterberger,
- N. Horikawa,
- N. d'Hose,
- C. -Yu Hsieh,
- S. Huber,
- S. Ishimoto,
- A. Ivanov,
- Yu. Ivanshin,
- T. Iwata,
- R. Jahn,
- V. Jary,
- P. Jörg,
- R. Joosten,
- E. Kabuß,
- 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,
- M. Krämer,
- P. Kremser,
- F. Krinner,
- Z.V. Kroumchtein,
- N. Kuchinski,
- F. Kunne,
- K. Kurek,
- R.P. Kurjata,
- A.A. Lednev,
- A. Lehmann,
- M. Levillain,
- S. Levorato,
- J. Lichtenstadt,
- R. Longo,
- A. Maggiora,
- A. Magnon,
- N. Makins,
- 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,
- D. Neyret,
- V.I. Nikolaenko,
- J. Novy,
- W.-D. Nowak,
- A.S. Nunes,
- A.G. Olshevsky,
- I. Orlov,
- M. Ostrick,
- D. Panzieri,
- B. Parsamyan,
- S. Paul,
- J.-C. Peng,
- F. Pereira,
- M. Pesek,
- D.V. Peshekhonov,
- S. Platchkov,
- J. Pochodzalla,
- V.A. Polyakov,
- J. Pretz,
- M. Quaresma,
- C. Quintans,
- S. Ramos,
- C. Regali,
- G. Reicherz,
- C. Riedl,
- E. Rocco,
- N.S. Rossiyskaya,
- D.I. Ryabchikov,
- A. Rychter,
- V.D. Samoylenko,
- A. Sandacz,
- C. Santos,
- S. Sarkar,
- I.A. Savin,
- G. Sbrizzai,
- P. Schiavon,
- K. Schmidt,
- H. Schmieden,
- K. Schönning,
- S. Schopferer,
- A. Selyunin,
- O.Yu. Shevchenko,
- L. Silva,
- L. Sinha,
- S. Sirtl,
- M. Slunecka,
- F. Sozzi,
- A. Srnka,
- M. Stolarski,
- M. Sulc,
- H. Suzuki,
- A. Szabelski,
- T. Szameitat,
- P. Sznajder,
- S. Takekawa,
- J. ter Wolbeek,
- S. Tessaro,
- F. Tessarotto,
- F. Thibaud,
- F. Tosello,
- V. Tskhay,
- S. Uhl,
- J. Veloso,
- M. Virius,
- T. Weisrock,
- M. Wilfert,
- R. Windmolders,
- K. Zaremba,
- M. Zavertyaev,
- E. Zemlyanichkina,
- M. Ziembicki,
- A. Zink
Affiliations
- C. Adolph
- Universität Erlangen–Nürnberg, Physikalisches Institut, 91054 Erlangen, Germany
- R. Akhunzyanov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- M.G. Alexeev
- University of Turin, Department of Physics, 10125 Turin, Italy
- G.D. Alexeev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- A. Amoroso
- University of Turin, Department of Physics, 10125 Turin, Italy
- V. Andrieux
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
- V. Anosov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- A. Austregesilo
- Technische Universität München, Physik Department, 85748 Garching, Germany
- C. Azevedo
- University of Aveiro, Department of Physics, 3810-193 Aveiro, Portugal
- B. Badełek
- University of Warsaw, Faculty of Physics, 02-093 Warsaw, Poland
- F. Balestra
- University of Turin, Department of Physics, 10125 Turin, Italy
- J. Barth
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany
- G. Baum
- R. Beck
- Universität Bonn, Helmholtz-Institut für Strahlen und Kernphysik, 53115 Bonn, Germany
- Y. Bedfer
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
- J. Bernhard
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
- K. Bicker
- Technische Universität München, Physik Department, 85748 Garching, Germany
- E.R. Bielert
- CERN, 1211 Geneva 23, Switzerland
- R. Birsa
- Trieste Section of INFN, 34127 Trieste, Italy
- J. Bisplinghoff
- Universität Bonn, Helmholtz-Institut für Strahlen und Kernphysik, 53115 Bonn, Germany
- M. Bodlak
- Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic
- M. Boer
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
- P. Bordalo
- LIP, 1000-149 Lisbon, Portugal
- F. Bradamante
- University of Trieste, Department of Physics, 34127 Trieste, Italy
- C. Braun
- Universität Erlangen–Nürnberg, Physikalisches Institut, 91054 Erlangen, Germany
- A. Bressan
- University of Trieste, Department of Physics, 34127 Trieste, Italy
- M. Büchele
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
- E. Burtin
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
- L. Capozza
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
- W.-C. Chang
- Academia Sinica, Institute of Physics, Taipei, 11529 Taiwan
- M. Chiosso
- University of Turin, Department of Physics, 10125 Turin, Italy
- I. Choi
- University of Illinois at Urbana–Champaign, Department of Physics, Urbana, IL 61801-3080, USA
- S.U. Chung
- Technische Universität München, Physik Department, 85748 Garching, Germany
- A. Cicuttin
- Abdus Salam ICTP, 34151 Trieste, Italy
- M.L. Crespo
- Abdus Salam ICTP, 34151 Trieste, Italy
- Q. Curiel
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
- S. Dalla Torre
- Trieste Section of INFN, 34127 Trieste, Italy
- S.S. Dasgupta
- Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India
- S. Dasgupta
- University of Trieste, Department of Physics, 34127 Trieste, Italy
- O.Yu. Denisov
- Torino Section of INFN, 10125 Turin, Italy
- L. Dhara
- Matrivani Institute of Experimental Research & Education, Calcutta-700 030, 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 Japan
- V. Duic
- University of Trieste, Department of Physics, 34127 Trieste, Italy
- M. Dziewiecki
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland
- A. Efremov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- P.D. Eversheim
- Universität Bonn, Helmholtz-Institut für Strahlen und Kernphysik, 53115 Bonn, Germany
- W. Eyrich
- Universität Erlangen–Nürnberg, Physikalisches Institut, 91054 Erlangen, Germany
- A. Ferrero
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
- M. Finger
- Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic
- M. Finger jr.
- Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic
- H. Fischer
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
- C. Franco
- LIP, 1000-149 Lisbon, Portugal
- N. du Fresne von Hohenesche
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
- J.M. Friedrich
- Technische Universität München, Physik Department, 85748 Garching, Germany
- V. Frolov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- E. Fuchey
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
- F. Gautheron
- Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany
- O.P. Gavrichtchouk
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- S. Gerassimov
- Lebedev Physical Institute, 119991 Moscow, Russia
- F. Giordano
- University of Illinois at Urbana–Champaign, Department of Physics, Urbana, IL 61801-3080, USA
- I. Gnesi
- University of Turin, Department of Physics, 10125 Turin, Italy
- M. Gorzellik
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
- S. Grabmüller
- Technische Universität München, Physik Department, 85748 Garching, Germany
- A. Grasso
- University of Turin, Department of Physics, 10125 Turin, Italy
- M. Grosse-Perdekamp
- University of Illinois at Urbana–Champaign, Department of Physics, Urbana, IL 61801-3080, USA
- B. Grube
- Technische Universität München, Physik Department, 85748 Garching, Germany
- T. Grussenmeyer
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
- A. Guskov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- F. Haas
- Technische Universität München, Physik Department, 85748 Garching, Germany
- D. Hahne
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany
- D. von Harrach
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
- R. Hashimoto
- Yamagata University, Yamagata, 992-8510 Japan
- F.H. Heinsius
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
- F. Herrmann
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
- F. Hinterberger
- Universität Bonn, Helmholtz-Institut für Strahlen und Kernphysik, 53115 Bonn, Germany
- N. Horikawa
- Nagoya University, 464 Nagoya, Japan
- N. d'Hose
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
- C. -Yu Hsieh
- Academia Sinica, Institute of Physics, Taipei, 11529 Taiwan
- S. Huber
- Technische Universität München, Physik Department, 85748 Garching, Germany
- S. Ishimoto
- Yamagata University, Yamagata, 992-8510 Japan
- A. Ivanov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- Yu. Ivanshin
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- T. Iwata
- Yamagata University, Yamagata, 992-8510 Japan
- R. Jahn
- Universität Bonn, Helmholtz-Institut für Strahlen und Kernphysik, 53115 Bonn, Germany
- V. Jary
- Czech Technical University in Prague, 16636 Prague, Czech Republic
- P. Jörg
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
- R. Joosten
- Universität Bonn, Helmholtz-Institut für Strahlen und Kernphysik, 53115 Bonn, Germany
- E. Kabuß
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
- B. Ketzer
- Technische Universität München, Physik Department, 85748 Garching, Germany
- 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, Russia
- F. Klein
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany
- K. Klimaszewski
- National Centre for Nuclear Research, 00-681 Warsaw, Poland
- J.H. Koivuniemi
- Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany
- 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 Japan
- K. Königsmann
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
- I. Konorov
- Lebedev Physical Institute, 119991 Moscow, Russia
- V.F. Konstantinov
- State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia
- A.M. Kotzinian
- University of Turin, Department of Physics, 10125 Turin, Italy
- O. Kouznetsov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- M. Krämer
- Technische Universität München, Physik Department, 85748 Garching, Germany
- P. Kremser
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
- F. Krinner
- Technische Universität München, Physik Department, 85748 Garching, Germany
- Z.V. Kroumchtein
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- N. Kuchinski
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- F. Kunne
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
- K. Kurek
- National Centre for Nuclear Research, 00-681 Warsaw, Poland
- R.P. Kurjata
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland
- A.A. Lednev
- State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia
- A. Lehmann
- Universität Erlangen–Nürnberg, Physikalisches Institut, 91054 Erlangen, Germany
- M. Levillain
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
- S. Levorato
- Trieste Section of INFN, 34127 Trieste, Italy
- J. Lichtenstadt
- Tel Aviv University, School of Physics and Astronomy, 69978 Tel Aviv, Israel
- R. Longo
- University of Turin, Department of Physics, 10125 Turin, Italy
- A. Maggiora
- Torino Section of INFN, 10125 Turin, Italy
- A. Magnon
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
- N. Makins
- University of Illinois at Urbana–Champaign, Department of Physics, Urbana, IL 61801-3080, USA
- N. Makke
- University of Trieste, Department of Physics, 34127 Trieste, Italy
- G.K. Mallot
- CERN, 1211 Geneva 23, Switzerland
- C. Marchand
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
- A. Martin
- University of Trieste, Department of Physics, 34127 Trieste, Italy
- J. Marzec
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland
- J. Matousek
- Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic
- H. Matsuda
- Yamagata University, Yamagata, 992-8510 Japan
- T. Matsuda
- University of Miyazaki, Miyazaki 889-2192, Japan
- G. Meshcheryakov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- W. Meyer
- Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany
- T. Michigami
- Yamagata University, Yamagata, 992-8510 Japan
- Yu.V. Mikhailov
- State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia
- Y. Miyachi
- Yamagata University, Yamagata, 992-8510 Japan
- A. Nagaytsev
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- T. Nagel
- Technische Universität München, Physik Department, 85748 Garching, Germany
- F. Nerling
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
- D. Neyret
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
- V.I. Nikolaenko
- State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia
- J. Novy
- Czech Technical University in Prague, 16636 Prague, Czech Republic
- W.-D. Nowak
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
- A.S. Nunes
- LIP, 1000-149 Lisbon, Portugal
- A.G. Olshevsky
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- I. Orlov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- M. Ostrick
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
- D. Panzieri
- University of Eastern Piedmont, 15100 Alessandria, Italy
- B. Parsamyan
- University of Turin, Department of Physics, 10125 Turin, Italy
- S. Paul
- Technische Universität München, Physik Department, 85748 Garching, Germany
- J.-C. Peng
- University of Illinois at Urbana–Champaign, Department of Physics, Urbana, IL 61801-3080, USA
- F. Pereira
- University of Aveiro, Department of Physics, 3810-193 Aveiro, Portugal
- M. Pesek
- Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic
- D.V. Peshekhonov
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- S. Platchkov
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
- J. Pochodzalla
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
- 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, Germany
- M. Quaresma
- LIP, 1000-149 Lisbon, Portugal
- C. Quintans
- LIP, 1000-149 Lisbon, Portugal
- S. Ramos
- LIP, 1000-149 Lisbon, Portugal
- C. Regali
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
- G. Reicherz
- Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany
- C. Riedl
- University of Illinois at Urbana–Champaign, Department of Physics, Urbana, IL 61801-3080, USA
- E. Rocco
- CERN, 1211 Geneva 23, Switzerland
- N.S. Rossiyskaya
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- D.I. Ryabchikov
- State Scientific Center Institute for High Energy Physics of National Research Center ‘Kurchatov Institute’, 142281 Protvino, Russia
- A. Rychter
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland
- 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, Poland
- C. Santos
- Trieste Section of INFN, 34127 Trieste, Italy
- S. Sarkar
- Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India
- I.A. Savin
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- G. Sbrizzai
- University of Trieste, Department of Physics, 34127 Trieste, Italy
- P. Schiavon
- University of Trieste, Department of Physics, 34127 Trieste, Italy
- K. Schmidt
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
- H. Schmieden
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany
- K. Schönning
- CERN, 1211 Geneva 23, Switzerland
- S. Schopferer
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
- A. Selyunin
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- O.Yu. Shevchenko
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- L. Silva
- LIP, 1000-149 Lisbon, Portugal
- L. Sinha
- Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India
- S. Sirtl
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
- M. Slunecka
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- F. Sozzi
- Trieste Section of INFN, 34127 Trieste, Italy
- A. Srnka
- Institute of Scientific Instruments, AS CR, 61264 Brno, Czech Republic
- M. Stolarski
- LIP, 1000-149 Lisbon, Portugal
- M. Sulc
- Technical University in Liberec, 46117 Liberec, Czech Republic
- H. Suzuki
- Yamagata University, Yamagata, 992-8510 Japan
- A. Szabelski
- National Centre for Nuclear Research, 00-681 Warsaw, Poland
- T. Szameitat
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
- P. Sznajder
- National Centre for Nuclear Research, 00-681 Warsaw, Poland
- S. Takekawa
- University of Turin, Department of Physics, 10125 Turin, Italy
- J. ter Wolbeek
- Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany
- S. Tessaro
- Trieste Section of INFN, 34127 Trieste, Italy
- F. Tessarotto
- Trieste Section of INFN, 34127 Trieste, Italy
- F. Thibaud
- CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France
- F. Tosello
- Torino Section of INFN, 10125 Turin, Italy
- V. Tskhay
- Lebedev Physical Institute, 119991 Moscow, Russia
- S. Uhl
- Technische Universität München, Physik Department, 85748 Garching, Germany
- J. Veloso
- University of Aveiro, Department of Physics, 3810-193 Aveiro, Portugal
- M. Virius
- Czech Technical University in Prague, 16636 Prague, Czech Republic
- T. Weisrock
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
- M. Wilfert
- Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany
- R. Windmolders
- Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany
- K. Zaremba
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland
- M. Zavertyaev
- Lebedev Physical Institute, 119991 Moscow, Russia
- E. Zemlyanichkina
- Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
- M. Ziembicki
- Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland
- A. Zink
- Universität Erlangen–Nürnberg, Physikalisches Institut, 91054 Erlangen, Germany
- DOI
- https://doi.org/10.1016/j.physletb.2015.11.064
- Journal volume & issue
-
Vol. 753,
no. C
pp. 18 – 28
Abstract
New results for the double spin asymmetry A1p and the proton longitudinal spin structure function g1p are presented. They were obtained by the COMPASS Collaboration using polarised 200 GeV muons scattered off a longitudinally polarised NH3 target. The data were collected in 2011 and complement those recorded in 2007 at 160 GeV, in particular at lower values of x. They improve the statistical precision of g1p(x) by about a factor of two in the region x≲0.02. A next-to-leading order QCD fit to the g1 world data is performed. It leads to a new determination of the quark spin contribution to the nucleon spin, ΔΣ, ranging from 0.26 to 0.36, and to a re-evaluation of the first moment of g1p. The uncertainty of ΔΣ is mostly due to the large uncertainty in the present determinations of the gluon helicity distribution. A new evaluation of the Bjorken sum rule based on the COMPASS results for the non-singlet structure function g1NS(x,Q2) yields as ratio of the axial and vector coupling constants |gA/gV|=1.22±0.05 (stat.)±0.10 (syst.), which validates the sum rule to an accuracy of about 9%.
