Determination of the deep inelastic contribution to the generalised Gerasimov-Drell-Hearn integral for the proton and neutron

HERMES Collaboration

doi:10.1016/S0370-2693(98)01396-3

Determination of the deep inelastic contribution to the generalised Gerasimov-Drell-Hearn integral for the proton and neutron

HERMES Collaboration

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

The virtual photon absorption cross section differences [alpha(1/2) - alpha(3/2)] for the proton and neutron have been determined from measurements of polarised cross section asymmetries in deep inelastic scattering of 27.5 GeV longitudinally polarised positrons from polarised H-1 and He-3 internal gas targets. The data were collected in the region above the nucleon resonances in the kinematic range v < 23.5 GeV and 0.8 GeV2 < Q(2) < 12 GeV2. For the proton the contribution to the generalised Gerasimov-Drell-Hearn integral was found to be substantial and must be included for an accurate determination of the full integral. Furthermore the data are consistent with a QCD next-to-leading order fit based on previous deep inelastic scattering data. Therefore higher twist effects do not appear significant. (C) 1998 Elsevier Science B.V. All rights reserved.

Original language	English
Pages (from-to)	531-538
Number of pages	8
Journal	Physics Letters B
Volume	444
Issue number	3-4
DOIs	https://doi.org/10.1016/S0370-2693(98)01396-3
Publication status	Published - 24 Dec 1998
Externally published	Yes

Keywords

SPIN STRUCTURE-FUNCTION
STRUCTURE-FUNCTION G(1)(N)
RESONANCE REGION
POLARIZED HE-3
PARTON MODEL
SUM-RULES
E-P
SCATTERING
NUCLEON

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@article{63dea2e66e6c46808a988c8045835099,

title = "Determination of the deep inelastic contribution to the generalised Gerasimov-Drell-Hearn integral for the proton and neutron",

abstract = "The virtual photon absorption cross section differences [alpha(1/2) - alpha(3/2)] for the proton and neutron have been determined from measurements of polarised cross section asymmetries in deep inelastic scattering of 27.5 GeV longitudinally polarised positrons from polarised H-1 and He-3 internal gas targets. The data were collected in the region above the nucleon resonances in the kinematic range v < 23.5 GeV and 0.8 GeV2 < Q(2) < 12 GeV2. For the proton the contribution to the generalised Gerasimov-Drell-Hearn integral was found to be substantial and must be included for an accurate determination of the full integral. Furthermore the data are consistent with a QCD next-to-leading order fit based on previous deep inelastic scattering data. Therefore higher twist effects do not appear significant. (C) 1998 Elsevier Science B.V. All rights reserved.",

keywords = "SPIN STRUCTURE-FUNCTION, STRUCTURE-FUNCTION G(1)(N), RESONANCE REGION, POLARIZED HE-3, PARTON MODEL, SUM-RULES, E-P, SCATTERING, NUCLEON",

author = "K. Ackerstaff and A. Airapetian and N. Akopov and I. Akushevich and M. Amarian and E.C. Aschenauer and H. Avakian and R. Avakian and A. Avetissian and B. Bains and S. Barrow and C. Baumgarten and M. Beckmann and S. Belostotski and J.E. Belz and T. Benisch and S. Bernreuther and N. Bianchi and S. Blanchard and J. Blouw and H. Bottcher and A. Borissov and J. Brack and S. Brauksiepe and B. Braun and B. Bray and S. Brons and W. Bruckner and A. Brull and E.E.W. Bruins and H.J. Bulten and R. Cadman and G.P. Capitani and P. Carter and P. Chumney and E. Cisbani and G.R. Court and \{Dal Piaz\}, P.F. and P.P.J. Delheij and \{De Sanctis\}, E. and \{De Schepper\}, D. and E. Devitsin and P.K.A.D. Huberts and \{Di Nezza\}, P. and M. Duren and A. Dvoredsky and G. Elbakian and J. Ely and J. Emerson and \{van den Brand\}, J.F.J. and \{HERMES Collaboration\}",

year = "1998",

month = dec,

day = "24",

doi = "10.1016/S0370-2693(98)01396-3",

language = "English",

volume = "444",

pages = "531--538",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "3-4",

}

TY - JOUR

T1 - Determination of the deep inelastic contribution to the generalised Gerasimov-Drell-Hearn integral for the proton and neutron

AU - Ackerstaff, K.

AU - Airapetian, A.

AU - Akopov, N.

AU - Akushevich, I.

AU - Amarian, M.

AU - Aschenauer, E.C.

AU - Avakian, H.

AU - Avakian, R.

AU - Avetissian, A.

AU - Bains, B.

AU - Barrow, S.

AU - Baumgarten, C.

AU - Beckmann, M.

AU - Belostotski, S.

AU - Belz, J.E.

AU - Benisch, T.

AU - Bernreuther, S.

AU - Bianchi, N.

AU - Blanchard, S.

AU - Blouw, J.

AU - Bottcher, H.

AU - Borissov, A.

AU - Brack, J.

AU - Brauksiepe, S.

AU - Braun, B.

AU - Bray, B.

AU - Brons, S.

AU - Bruckner, W.

AU - Brull, A.

AU - Bruins, E.E.W.

AU - Bulten, H.J.

AU - Cadman, R.

AU - Capitani, G.P.

AU - Carter, P.

AU - Chumney, P.

AU - Cisbani, E.

AU - Court, G.R.

AU - Dal Piaz, P.F.

AU - Delheij, P.P.J.

AU - De Sanctis, E.

AU - De Schepper, D.

AU - Devitsin, E.

AU - Huberts, P.K.A.D.

AU - Di Nezza, P.

AU - Duren, M.

AU - Dvoredsky, A.

AU - Elbakian, G.

AU - Ely, J.

AU - Emerson, J.

AU - van den Brand, J.F.J.

AU - HERMES Collaboration

PY - 1998/12/24

Y1 - 1998/12/24

N2 - The virtual photon absorption cross section differences [alpha(1/2) - alpha(3/2)] for the proton and neutron have been determined from measurements of polarised cross section asymmetries in deep inelastic scattering of 27.5 GeV longitudinally polarised positrons from polarised H-1 and He-3 internal gas targets. The data were collected in the region above the nucleon resonances in the kinematic range v < 23.5 GeV and 0.8 GeV2 < Q(2) < 12 GeV2. For the proton the contribution to the generalised Gerasimov-Drell-Hearn integral was found to be substantial and must be included for an accurate determination of the full integral. Furthermore the data are consistent with a QCD next-to-leading order fit based on previous deep inelastic scattering data. Therefore higher twist effects do not appear significant. (C) 1998 Elsevier Science B.V. All rights reserved.

AB - The virtual photon absorption cross section differences [alpha(1/2) - alpha(3/2)] for the proton and neutron have been determined from measurements of polarised cross section asymmetries in deep inelastic scattering of 27.5 GeV longitudinally polarised positrons from polarised H-1 and He-3 internal gas targets. The data were collected in the region above the nucleon resonances in the kinematic range v < 23.5 GeV and 0.8 GeV2 < Q(2) < 12 GeV2. For the proton the contribution to the generalised Gerasimov-Drell-Hearn integral was found to be substantial and must be included for an accurate determination of the full integral. Furthermore the data are consistent with a QCD next-to-leading order fit based on previous deep inelastic scattering data. Therefore higher twist effects do not appear significant. (C) 1998 Elsevier Science B.V. All rights reserved.

KW - SPIN STRUCTURE-FUNCTION

KW - STRUCTURE-FUNCTION G(1)(N)

KW - RESONANCE REGION

KW - POLARIZED HE-3

KW - PARTON MODEL

KW - SUM-RULES

KW - E-P

KW - SCATTERING

KW - NUCLEON

U2 - 10.1016/S0370-2693(98)01396-3

DO - 10.1016/S0370-2693(98)01396-3

M3 - Article

SN - 0370-2693

VL - 444

SP - 531

EP - 538

JO - Physics Letters B

JF - Physics Letters B

IS - 3-4

ER -

Determination of the deep inelastic contribution to the generalised Gerasimov-Drell-Hearn integral for the proton and neutron

Abstract

Keywords

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