II - Experimental investigation of transverse spin asymmetries in mu-p SIDIS processes: Sivers asymmetries

C. Adolph; M.G. Alekseev; V.Yu. Alexakhin; Yu. Alexandrov; G.D. Alexeev; A. Amoroso; A.A. Antonov; A. Austregesilo; B. Badełek; F. Balestra; J. Barth; G. Baum; Y. Bedfer; J. Bernhard; R. Bertini; M. Bettinelli; K. Bicker; J. Bieling; R. Birsa; J. Bisplinghoff; P. Bordalo; F. Bradamante; C. Braun; A. Bravar; A. Bressan; E. Burtin; Leonardo Scapozza; M. Chiosso; S.U. Chung; A. Cicuttin; M.L. Crespo; S. Dalla Torre; S. Das; S.S. Dasgupta; O.Yu. Denisov; L. Dhara; S.V. Donskov; N. Doshita; V. Duic; W. Dünnweber; M. Dziewiecki; A. Efremov; C. Elia; P.D. Eversheim; W. Eyrich; M. Faessler; A. Ferrero; A. Filin; M. Finger; H. Fischer; C. Franco; N. Du Fresne von Hohenesche; J.M. Friedrich; R. Garfagnini; F. Gautheron; O.P. Gavrichtchouk; R. Gazda; S. Gerassimov; R. Geyer; M. Giorgi; I. Gnesi; B. Gobbo; S. Goertz; S. Grabmüller; A. Grasso; B. Grube; R. Gushterski; A. Guskov; T. Guthörl; F. Haas; D. von Harrach; S. Hedicke; F.H. Heinsius; F. Herrmann; C. Hess; F. Hinterberger; N. Horikawa; Ch. Höppner; N. Dʼhose; S. Huber; S. Ishimoto; O. Ivanov; Yu. Ivanshin; T. Iwata; R. Jahn; P. Jasinski; R. Joosten; E. Kabuss; D. Kang; B. Ketzer; G.V. Khaustov; Yu.A. Khokhlov; Yu. Kisselev; F. Klein; K. Klimaszewski; S. Koblitz; J.H. Koivuniemi; V.N. Kolosov; K. Kondo; K. Königsmann; I. Konorov; V.F. Konstantinov; A. Korzenev; A.M. Kotzinian; O. Kouznetsov; M. Krämer; Z.V. Kroumchtein; F. Kunne; K. Kurek; L. Lauser; J.-M. Le Goff; A.A. Lednev; A. Lehmann; S. Levorato; J. Lichtenstadt; A. Maggiora; A. Magnon; N. Makke; G.K. Mallot; A. Mann; C. Marchand; A. Martin; J. Marzec; T. Matsuda; W. Meyer; T. Michigami; Yu.V. Mikhailov; M.A. Moinester; A. Morreale; A. Mutter; A. Nagaytsev; T. Nagel; J.P. Nassalski; F. Nerling; S. Neubert; D. Neyret; V.I. Nikolaenko; W.D. Nowak; A.S. Nunes; A.G. Olshevsky; M. Ostrick; A. Padee; R. Panknin; D. Panzieri; B. Parsamyan; S. Paul; E. Perevalova; G. Pesaro; D.V. Peshekhonov; G. Piragino; S. Platchkov; J. Pochodzalla; J. Polak; V.A. Polyakov; G. Pontecorvo; J. Pretz; S.L. Procureur; M. Quaresma; C. Quintans; J.-F. Rajotte; S. Ramos; V. Rapatsky; G. Reicherz; A. Richter; E. Rocco; E. Rondio; N.S. Rossiyskaya; D.I. Ryabchikov; V.D. Samoylenko; A. Sandacz; M.G. Sapozhnikov; S. Sarkar; I.A. Savin; G. Sbrizzai; P. Schiavon; C. Schill; T. Schlüter; K. Schmidt; L. Schmitt; K. Schönning; S. Schopferer; M. Schott; O.Yu. Shevchenko; L. Silva; L. Sinha; A.N. Sissakian; M. Slunecka; George Smirnov; S. Sosio; F. Sozzi; A. Srnka; M. Stolarski; M. Sulc; R. Sulej; H. Suzuki; P. Sznajder; S. Takekawa; J. ter Wolbeek; S. Tessaro; F. Tessarotto; L.G. Tkatchev; S. Uhl; I. Uman; M. Vandenbroucke; M. Virius; N.V. Vlassov; L. Wang; M. Wilfert; R. Windmolders; W. Wiślicki; H. Wollny; K. Zaremba; M. Zavertyaev; E. Zemlyanichkina; M. Ziembicki; N. Zhuravlev; A. Zvyagin

doi:10.1016/j.physletb.2012.09.056

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II - Experimental investigation of transverse spin asymmetries in mu-p SIDIS processes: Sivers asymmetries

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II - Experimental investigation of transverse spin asymmetries in mu-p SIDIS processes: Sivers asymmetries

C. Adolph, M.G. Alekseev, V.Yu. Alexakhin, Yu. Alexandrov, G.D. Alexeev, A. Amoroso, A.A. Antonov, A. Austregesilo, B. Badełek, F. Balestra, …

Physics Letters B, Vol.717(4-5)

2012

DOI: https://doi.org/10.1016/j.physletb.2012.09.056

Abstract

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 mu(+) beam and a transversely polarised NH3 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 hadrons, a clear indication of a spin-orbit coupling of quarks in a transversely polarised proton. As compared to measurements at lower energy, a smaller Sivers asymmetry for positive hadrons is found in the region x > 0.03. The asymmetry is different from zero and positive also in the low x region, where sea-quarks dominate. The kinematic dependence of the asymmetry has also been investigated and results are given for various intervals of hadron and virtual photon fractional energy. In contrast to the case of the Collins asymmetry, the results on the Sivers asymmetry suggest a strong dependence on the four-momentum transfer to the nucleon, in agreement with the most recent calculations.

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Title: II - Experimental investigation of transverse spin asymmetries in mu-p SIDIS processes: Sivers asymmetries
Creators - without role: C. Adolph - Physikalisches Institut [Erlangen]
M.G. Alekseev - Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
V.Yu. Alexakhin - Joint Institute for Nuclear Research
Yu. Alexandrov - P.N. Lebedev Physical Institute of the Russian Academy of Sciences
G.D. Alexeev - Joint Institute for Nuclear Research
A. Amoroso - University of Turin
A.A. Antonov - Joint Institute for Nuclear Research
A. Austregesilo - Technical University of Munich
B. Badełek - University of Warsaw
F. Balestra - Laboratoire de Physique des Composants à Semiconducteurs
J. Barth - University of Bonn
G. Baum - Bielefeld University
Y. Bedfer - Département de Physique Nucléaire (ex SPhN)
J. Bernhard - Johannes Gutenberg University Mainz
R. Bertini - University of Turin
M. Bettinelli - University of Verona
K. Bicker - Technical University of Munich
J. Bieling - University of Bonn
R. Birsa - Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
J. Bisplinghoff - University of Bonn
P. Bordalo - Fundação para a Ciência e Tecnologia
F. Bradamante - University of Trieste
C. Braun - Friedrich-Alexander-Universität Erlangen-Nürnberg
A. Bravar
A. Bressan - Department of Mathematics [Philadelphia]
E. Burtin - Département de Physique Nucléaire (ex SPhN)
Leonardo Scapozza
M. Chiosso - University of Turin
S.U. Chung - National Taiwan University
A. Cicuttin - The Abdus Salam International Centre for Theoretical Physics (ICTP)
M.L. Crespo - The Abdus Salam International Centre for Theoretical Physics (ICTP)
S. Dalla Torre
S. Das - Laboratoire d’Informatique Fondamentale de Marseille
S.S. Dasgupta - Department of Zoology
O.Yu. Denisov
L. Dhara
S.V. Donskov
N. Doshita - Yamagata University Hospital
V. Duic - University of Trieste
W. Dünnweber - Ludwig-Maximilians-Universität München
M. Dziewiecki - Warsaw University of Technology
A. Efremov
C. Elia - Antonine University
P.D. Eversheim - University of Bonn
W. Eyrich - Friedrich-Alexander-Universität Erlangen-Nürnberg
M. Faessler - Ludwig-Maximilians-Universität München
A. Ferrero - Département de Physique Nucléaire (ex SPhN)
A. Filin
M. Finger - Charles University
H. Fischer - Karlsruhe Institute of Technology
C. Franco - Laboratoire sur le Langage, le Cerveau et la Cognition
N. Du Fresne von Hohenesche - European Organization for Nuclear Research
J.M. Friedrich - Technical University of Munich
R. Garfagnini - University of Turin
F. Gautheron - Ruhr University Bochum
O.P. Gavrichtchouk - Joint Institute for Nuclear Research
R. Gazda
S. Gerassimov - Technical University of Munich
R. Geyer - Ludwig-Maximilians-Universität München
M. Giorgi - University of Trieste
I. Gnesi - University of Turin
B. Gobbo
S. Goertz - University of Bonn
S. Grabmüller - Technical University of Munich
A. Grasso - Archeobotanica e Paleoecologia
B. Grube - Technical University of Munich
R. Gushterski - Joint Institute for Nuclear Research
A. Guskov - Joint Institute for Nuclear Research
T. Guthörl - University of Freiburg
F. Haas
D. von Harrach - Johannes Gutenberg University Mainz
S. Hedicke
F.H. Heinsius - University of Freiburg
F. Herrmann - University of Freiburg
C. Hess
F. Hinterberger - University of Bonn
N. Horikawa - Nagoya University
Ch. Höppner - Technical University of Munich
N. Dʼhose - Département de Physique Nucléaire (ex SPhN)
S. Huber - Ion Physics
S. Ishimoto - Yamagata University Hospital
O. Ivanov - Joint Institute for Nuclear Research
Yu. Ivanshin - Joint Institute for Nuclear Research
T. Iwata - Department of Environmental and Materials Engineering
R. Jahn - University of Bonn
P. Jasinski - Johannes Gutenberg University Mainz
R. Joosten - Institute for Computing and Information Sciences [Nijmegen]
E. Kabuss
D. Kang - Johannes Gutenberg University Mainz
B. Ketzer - Technical University of Munich
G.V. Khaustov
Yu.A. Khokhlov - P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Yu. Kisselev - Ruhr University Bochum
F. Klein - Laboratory of Molecular Immunology
K. Klimaszewski - University of Warsaw
S. Koblitz - Johannes Gutenberg University Mainz
J.H. Koivuniemi - Ruhr University Bochum
V.N. Kolosov
K. Kondo - Yamagata University Hospital
K. Königsmann - University of Freiburg
I. Konorov - Technical University of Munich
V.F. Konstantinov
A. Korzenev - Département de Physique Nucléaire (ex SPhN)
A.M. Kotzinian - University of Turin
O. Kouznetsov - Joint Institute for Nuclear Research
M. Krämer - University of Manchester
Z.V. Kroumchtein - Joint Institute for Nuclear Research
F. Kunne - Département de Physique Nucléaire (ex SPhN)
K. Kurek - University of Warsaw
L. Lauser - University of Freiburg
J.-M. Le Goff - Université de Caen Normandie
A.A. Lednev
A. Lehmann - Centre for Research on Brain Language and Music
S. Levorato - University of Trieste
J. Lichtenstadt - Israel Academy of Sciences and Humanities
A. Maggiora
A. Magnon - Département de Physique Nucléaire (ex SPhN)
N. Makke - Département de Physique Nucléaire (ex SPhN)
G.K. Mallot - European Organization for Nuclear Research
A. Mann - Princeton University
C. Marchand - Département de Physique Nucléaire (ex SPhN)
A. Martin - aucun
J. Marzec - Warsaw University of Technology
T. Matsuda - University of Miyazaki
W. Meyer - Ruhr University Bochum
T. Michigami - Yamagata University Hospital
Yu.V. Mikhailov
M.A. Moinester
A. Morreale - Département de Physique Nucléaire (ex SPhN)
A. Mutter - University of Freiburg
A. Nagaytsev - Joint Institute for Nuclear Research
T. Nagel - Technical University of Munich
J.P. Nassalski
F. Nerling - University of Freiburg
S. Neubert - Technical University of Munich
D. Neyret - Département de Physique Nucléaire (ex SPhN)
V.I. Nikolaenko
W.D. Nowak
A.S. Nunes - Fundação para a Ciência e Tecnologia
A.G. Olshevsky - Joint Institute for Nuclear Research
M. Ostrick - Johannes Gutenberg University Mainz
A. Padee - Warsaw University of Technology
R. Panknin - University of Bonn
D. Panzieri - Università degli Studi del Piemonte Orientale “Amedeo Avogadro”
B. Parsamyan - University of Turin
S. Paul - Analyse, Géométrie et Modélisation
E. Perevalova - Joint Institute for Nuclear Research
G. Pesaro - University of Trieste
D.V. Peshekhonov - Joint Institute for Nuclear Research
G. Piragino - University of Turin
S. Platchkov - Département de Physique Nucléaire (ex SPhN)
J. Pochodzalla - Johannes Gutenberg University Mainz
J. Polak - Franco-czech Laboratory for clinical research on obesity
V.A. Polyakov
G. Pontecorvo
J. Pretz - University of Bonn
S.L. Procureur
M. Quaresma - Fundação para a Ciência e Tecnologia
C. Quintans - Fundação para a Ciência e Tecnologia
J.-F. Rajotte - Ludwig-Maximilians-Universität München
S. Ramos - Institut de Chimie des Substances Naturelles
V. Rapatsky - Joint Institute for Nuclear Research
G. Reicherz - Ruhr University Bochum
A. Richter - University of Bremen
E. Rocco - European Organization for Nuclear Research
E. Rondio - University of Warsaw
N.S. Rossiyskaya - Joint Institute for Nuclear Research
D.I. Ryabchikov
V.D. Samoylenko
A. Sandacz - University of Warsaw
M.G. Sapozhnikov - Joint Institute for Nuclear Research
S. Sarkar - University of Cambridge
I.A. Savin - Joint Institute for Nuclear Research
G. Sbrizzai - University of Trieste
P. Schiavon - University of Trieste
C. Schill - University of Freiburg
T. Schlüter - Ludwig-Maximilians-Universität München
K. Schmidt - University of Freiburg
L. Schmitt - Nordic Life Science Pipeline
K. Schönning - European Organization for Nuclear Research
S. Schopferer - University of Freiburg
M. Schott - Université de Montpellier, Institut des Biomolécules Max Mousseron - IBMM
O.Yu. Shevchenko - Joint Institute for Nuclear Research
L. Silva - Centre de Mise en Forme des Matériaux
L. Sinha
A.N. Sissakian - Joint Institute for Nuclear Research
M. Slunecka - Joint Institute for Nuclear Research
George Smirnov - Departamento de Matemática e Aplicações
S. Sosio - University of Turin
F. Sozzi
A. Srnka
M. Stolarski - Fundação para a Ciência e Tecnologia
M. Sulc
R. Sulej - University of Warsaw
H. Suzuki - Yamagata University Hospital
P. Sznajder - University of Warsaw
S. Takekawa
J. ter Wolbeek - University of Freiburg
S. Tessaro
F. Tessarotto
L.G. Tkatchev - Joint Institute for Nuclear Research
S. Uhl - Technical University of Munich
I. Uman - Ludwig-Maximilians-Universität München
M. Vandenbroucke - Département de Physique Nucléaire (ex SPhN)
M. Virius - Czech Technical University in Prague
N.V. Vlassov - Joint Institute for Nuclear Research
L. Wang - Imagerie et modélisation Vasculaires, Thoraciques et Cérébrales
M. Wilfert - Johannes Gutenberg University Mainz
R. Windmolders - University of Bonn
W. Wiślicki
H. Wollny - Département de Physique Nucléaire (ex SPhN)
K. Zaremba
M. Zavertyaev - P.N. Lebedev Physical Institute of the Russian Academy of Sciences
E. Zemlyanichkina - Joint Institute for Nuclear Research
M. Ziembicki - Warsaw University of Technology
N. Zhuravlev - Joint Institute for Nuclear Research
A. Zvyagin - Ludwig-Maximilians-Universität München
Publication Details: Physics Letters B, Vol.717(4-5)
Identifiers: 9936114109311
Academic Unit: Institut des Biomolécules Max Mousseron - IBMM
Language: English
Resource Type: Journal article
Local Fields: hal-01128824