Measurement of the neutron spin structure function g with a polarized 3He internal target
K. Ackerstaff(Deutsches Elektronen-Synchrotron DESY), A. Airapetian(California Institute of Technology), Igor Akushevich, Н. Акопов(California Institute of Technology), M. Amarian(California Institute of Technology), E. C. Aschenauer(Ghent University Hospital), R. Avakian(California Institute of Technology), H. Avakian(Istituto Nazionale di Fisica Nucleare), A. Avetissian(California Institute of Technology), B. Bains(University of Illinois Urbana-Champaign), S. Barrow(University of Pennsylvania), M. Beckmann(University of Freiburg), S. Belostotski(Petersburg Nuclear Physics Institute), Andrea Belz(TRIUMF), T. Benisch(Friedrich-Alexander-Universität Erlangen-Nürnberg), S. Bernreuther(Friedrich-Alexander-Universität Erlangen-Nürnberg), N. Bianchi(Istituto Nazionale di Fisica Nucleare), S. Blanchard(New Mexico State University), J. Blouw(National Institute for Subatomic Physics), H. Böttcher, A. Borissov(Deutsches Elektronen-Synchrotron DESY), J. Brack(University of Colorado Boulder), B. Braun(Technical University of Munich), B. Bray(California Institute of Technology), W. Brückner(Max Planck Society), A. Brüll(Max Planck Society), E. E. W. Bruins(Massachusetts Institute of Technology), H. J. Bulten(University of Wisconsin–Madison), G. P. Capitani(Istituto Nazionale di Fisica Nucleare), Paul Carter(California Institute of Technology), E. Cisbani(Istituto Superiore di Sanità), G.R. Court(University of Liverpool), P. P. J. Delheij(TRIUMF), E. Devitsin(P.N. Lebedev Physical Institute of the Russian Academy of Sciences), C. W. de Jager(University of Liverpool), E. De Sanctis(Istituto Nazionale di Fisica Nucleare), D. De Schepper(Massachusetts Institute of Technology), P. K. A. de Witt Huberts(National Institute for Subatomic Physics), M. Düren(Friedrich-Alexander-Universität Erlangen-Nürnberg), A. Dvoredsky(California Institute of Technology), G. Elbakian(University of Alberta), Joseph Emerson(University of Alberta), A. Fantoni(Istituto Nazionale di Fisica Nucleare), A. Fechtchenko(Joint Institute for Nuclear Research), M. Ferstl(Friedrich-Alexander-Universität Erlangen-Nürnberg), D. Fick(Philipps University of Marburg), K. Fiedler(Friedrich-Alexander-Universität Erlangen-Nürnberg), B. W. Filippone(California Institute of Technology), H. Fischer(University of Freiburg), H. T. Fortune(University of Pennsylvania), J. Franz(University of Freiburg), S. Frullani(Istituto Superiore di Sanità), M.-A. Funk(University of Freiburg), N. Gagunashvili(Joint Institute for Nuclear Research), P. Galumian(University of Alberta), H. Gao(University of Illinois Urbana-Champaign), Y. Gärber, F. Garibaldi(Istituto Superiore di Sanità), P. Geiger(Max Planck Society), V. Gharibyan(A. Alikhanyan National Laboratory), A. Golendoukhin(Philipps University of Marburg), G. Graw(Ludwig-Maximilians-Universität München), O. Grebeniouk(Petersburg Nuclear Physics Institute), P.W. Green(TRIUMF), L. G. Greeniaus(TRIUMF), C. Großhauser(Friedrich-Alexander-Universität Erlangen-Nürnberg), A. Gute(Friedrich-Alexander-Universität Erlangen-Nürnberg), V. Gyurjyan(Istituto Nazionale di Fisica Nucleare), J. Haas(New Mexico State University), W. Haeberli(University of Wisconsin–Madison), O. Hansen(Argonne National Laboratory), D. Hasch(New Mexico State University), O. Häusser(Simon Fraser University), R. S. Henderson(TRIUMF), T. Henkes(Friedrich-Alexander-Universität Erlangen-Nürnberg), R. Hertenberger(Istituto Superiore di Sanità), Y. Holler(Deutsches Elektronen-Synchrotron DESY), R. J. Holt(University of Illinois Urbana-Champaign), H. Ihssen(Deutsches Elektronen-Synchrotron DESY), M. Iodice(Istituto Superiore di Sanità), A. Izotov(Petersburg Nuclear Physics Institute), H. E. Jackson(Argonne National Laboratory), A. Jgoun(Petersburg Nuclear Physics Institute), Catherine Jones(Argonne National Laboratory), R. Kaiser(TRIUMF), E. Kinney(University of Colorado Boulder), M. Kirsch(Friedrich-Alexander-Universität Erlangen-Nürnberg), A. Kisselev(Petersburg Nuclear Physics Institute), P. Kitching(University of Alberta), N. Koch(Philipps University of Marburg), K. Königsmann(University of Freiburg), M. Kolstein(University of Freiburg), H. Kolster(Technical University of Munich), W. Korsch(California Institute of Technology), В. Козлов(P.N. Lebedev Physical Institute of the Russian Academy of Sciences), L. Kramer(Massachusetts Institute of Technology), B. Krause, V. G. Krivokhijine(Joint Institute for Nuclear Research), M. Kückes(Simon Fraser University), G. S. Kyle(New Mexico State University), W. Lachnit(A. Alikhanyan National Laboratory), W. Lorenzon(University of Pennsylvania), A. Lung(California Institute of Technology), N. C. R. Makins(Argonne National Laboratory), S. I. Manaenkov(California Institute of Technology), F. K. Martens(University of Alberta), J. W. Martin(Massachusetts Institute of Technology), A.O. Mateos(Massachusetts Institute of Technology), K. McIlhany(California Institute of Technology), R. D. McKeown(California Institute of Technology), F. Meißner(Deutsches Elektronen-Synchrotron DESY), D. Mercer(University of Colorado Boulder), A. Metz(Technical University of Munich), N. Meyners(New Mexico State University), O. Mikloukho(Petersburg Nuclear Physics Institute), C. A. Miller(University of Alberta), Meredith Miller(University of Illinois Urbana-Champaign), R. Milner(Massachusetts Institute of Technology), Valeri Valentinovitch Mitsyn(Joint Institute for Nuclear Research), A. Most(Urbana University), R. Mozzetti(Istituto Nazionale di Fisica Nucleare), V. Muccifora(Istituto Nazionale di Fisica Nucleare), А. Нагайцев(Istituto Superiore di Sanità), Y. Naryshkin(Petersburg Nuclear Physics Institute), Anna Marie Nathan(University of Illinois Urbana-Champaign), F. Neunreither(Friedrich-Alexander-Universität Erlangen-Nürnberg), M. Niczyporuk(Massachusetts Institute of Technology), W.‐D. Nowak, M. Nupieri(Istituto Nazionale di Fisica Nucleare), Ph. Oelwein(Max Planck Society), H. Ogami(Tokyo Institute of Technology), T. G. O’Neill(Argonne National Laboratory), R. Openshaw(TRIUMF), V. Papavassiliou(New Mexico State University), S. F. Pate(New Mexico State University), M. Pitt(California Institute of Technology), S. Potashov(P.N. Lebedev Physical Institute of the Russian Academy of Sciences), D. H. Potterveld(Argonne National Laboratory), Bogdan Povh(Max Planck Society), G. Rakness(University of Colorado Boulder), R. Redwine(Massachusetts Institute of Technology), A.R. Reolon(Istituto Nazionale di Fisica Nucleare), R. A. Ristinen(University of Colorado Boulder), K. Rith(Friedrich-Alexander-Universität Erlangen-Nürnberg), G. Röper(Deutsches Elektronen-Synchrotron DESY), H. Roloff, P. Rossi(Istituto Nazionale di Fisica Nucleare), S. Rudnitsky(University of Pennsylvania), M. Ruh(University of Freiburg), D. Ryckbosch(Istituto Superiore di Sanità), Y. Sakemi(Tokyo Institute of Technology), I. Savin(Joint Institute for Nuclear Research), Kelly L. Schuller, A. Schwind(Deutsches Elektronen-Synchrotron DESY), T.-A. Shibata(Tokyo Institute of Technology), T. Shin(Massachusetts Institute of Technology), A. Simon(University of Freiburg), K. Sinram(Deutsches Elektronen-Synchrotron DESY), W. R. Smythe(University of Alberta), J. Sowinski(Max Planck Society), M. Spengos(University of Pennsylvania), E. Steffens(Friedrich-Alexander-Universität Erlangen-Nürnberg), J. Stenger(Friedrich-Alexander-Universität Erlangen-Nürnberg), J. Stewart(University of Liverpool), F. Stock(Max Planck Society), U. Stoesslein(National Institute for Subatomic Physics), M. Sutter(Massachusetts Institute of Technology), H. Tallini(University of Liverpool), S. Taroian(A. Alikhanyan National Laboratory), A. Terkulov(P.N. Lebedev Physical Institute of the Russian Academy of Sciences), Douglas Michael Thiessen(TRIUMF), B. Tipton(Massachusetts Institute of Technology), A. Trudel(University of Alberta), M. Tytgat(Ghent University Hospital), G. M. Urciuoli(Istituto Superiore di Sanità), R. Van de Vyver(Ghent University Hospital), J. F. J. van den Brand(University of Wisconsin–Madison), G. van der Steenhoven(National Institute for Subatomic Physics), M. C. Vetterli(TRIUMF), E. Volk(Max Planck Society), W. Wander(Friedrich-Alexander-Universität Erlangen-Nürnberg), T. P. Welch(Oregon State University), S. E. Williamson(University of Illinois Urbana-Champaign), T. Wise(University of Wisconsin–Madison), T. Wölfel(Friedrich-Alexander-Universität Erlangen-Nürnberg), K. Zapfe-Düren(Petersburg Nuclear Physics Institute), H. Zohrabian(A. Alikhanyan National Laboratory), R. Zurmühle(University of Pennsylvania)
Cited by 307Open Access
Abstract
Results are reported from the HERMES experiment at HERA on a measurement of the neutron spin structure function g1n(x, Q2) in deep inelastic scattering using 27.5 GeV longitudinally polarized positrons incident on a polarized 3He internal gas target. The data cover the kinematic range 0.023 < × < 0.6 and 1 (GeV/c)2 < Q2 < 15 (GeV/c)2. The integral ∫0.60.023 g1n(x) dx evaluated at a fixed Q2 of 2.5 (GeV/c)2 is −0.034 ± 0.013(stat.)±0.005(syst.). Assuming Regge behavior at low x, the first moment Гn1 = ∫10 g1n(x)dx is −0.037 ± 0.013(stat.)±0.005(syst.)±0.006(extrapol.).
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