Leading order determination of the gluon polarisation from DIS events with high-p(T) hadron pairs

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; D. Chaberny; 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; 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; R. Windmolders; W. Wiślicki; H. Wollny; K. Zaremba; M. Zavertyaev; E. Zemlyanichkina; M. Ziembicki; N. Zhuravlev; A. Zvyagin

doi:10.1016/j.physletb.2012.11.056

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Leading order determination of the gluon polarisation from DIS events with high-p(T) hadron pairs

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Leading order determination of the gluon polarisation from DIS events with high-p(T) hadron pairs

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.718(3)

08/01/2013

DOI: https://doi.org/10.1016/j.physletb.2012.11.056

Abstract

We present a determination of the gluon polarisation Delta g/g in the nucleon, based on the longitudinal double-spin asymmetry of DIS events with Q(2) > 1 (GeV/c)(2) including a pair of large transverse-momentum hadrons in the final state. The data were obtained by the COMPASS experiment at CERN using a 160 GeV/c polarised muon beam scattering off a polarised (LiD)-Li-6 target. The gluon polarisation is evaluated by a Neural Network approach for three intervals of the gluon momentum fraction x(g) covering the range 0.04 < x(g) < 0.27. The values obtained at leading order in QCD do not show any significant dependence on x(g). Their average is Delta g/g = 0.125 +/- 0.060 (stat.) +/- 0.063 (syst.) at average x(g) = 0.09 and a scale of mu(2) = 3 (GeV/c)(2).

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Title: Leading order determination of the gluon polarisation from DIS events with high-p(T) hadron pairs
Creators - without role: C. Adolph - Friedrich-Alexander-Universität Erlangen-Nürnberg
M.G. Alekseev - Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
V.Yu. Alexakhin
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
A. Austregesilo - Technical University of Munich
B. Badełek - University of Warsaw
F. Balestra - University of Turin
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 - University of Trieste
E. Burtin - Département de Physique Nucléaire (ex SPhN)
D. Chaberny - Johannes Gutenberg University Mainz
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 - Joint Institute for Nuclear Research
C. Elia - University of Trieste
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 - University of Warsaw
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 - University of Turin
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 - Technical University of Munich
D. von Harrach - Johannes Gutenberg University Mainz
S. Hedicke - University of Freiburg
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 - Nagoya University
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 - University of Trieste
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 - Israel Academy of Sciences and Humanities
A. Morreale - Département de Physique Nucléaire (ex SPhN)
A. Mutter - Johannes Gutenberg University Mainz
A. Nagaytsev - Joint Institute for Nuclear Research
T. Nagel - Technical University of Munich
J.P. Nassalski - University of Warsaw
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 - Joint Institute for Nuclear Research
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 - Fundação para a Ciência e Tecnologia
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
P. Sznajder - University of Warsaw
S. Takekawa - University of Trieste
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
R. Windmolders - University of Bonn
W. Wiślicki - University of Warsaw
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.718(3)
Identifiers: 9936114009311
Academic Unit: Institut des Biomolécules Max Mousseron - IBMM
Language: English
Resource Type: Journal article
Local Fields: hal-01128794