Deep inelastic scattering of polarized electrons by polarized $^3$He and the study of the neutron spin structure

P.L. Anthony; R.G. Arnold; H.R. Band; H. Borel; P.E. Bosted; Vincent Breton; G.D. Cates; T.E. Chupp; F.S. Dietrich; J. Dunne; R. Erbacher; J. Fellbaum; H. Fonvieille; R. Gearhart; R. Holmes; E.W. Hughes; J.R. Johnson; D. Kawall; C. Keppel; S.E. Kuhn; R.M. Lombard-Nelsen; J. Marroncle; T. Maruyama; W. Meyer; Z.E. Meziani; H. Middleton; J. Morgenstern; N.R. Newbury; G.G. Petratos; R. Pitthan; R. Prepost; Y. Roblin; S.E. Rock; S.H. Rokni; G. Shapiro; T. Smith; P.A. Souder; M. Spengos; F. Staley; L.M. Stuart; Z.M. Szalata; Y. Terrien; A.K. Thompson; J.L. White; M. Woods; J. Xu; C.C. Young; G. Zapalac

Journal Articles Physical Review D Year : 1996

Deep inelastic scattering of polarized electrons by polarized $^3$He and the study of the neutron spin structure

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P.L. Anthony

Function : Author

R.G. Arnold

Function : Author

H.R. Band

Function : Author

H. Borel

Function : Author

P.E. Bosted

Function : Author

Vincent Breton

Function : Author
PersonId : 917630

Laboratoire de Physique Corpusculaire - Clermont-Ferrand

G.D. Cates

Function : Author

T.E. Chupp

Function : Author

F.S. Dietrich

Function : Author

J. Dunne

Function : Author

R. Erbacher

Function : Author

J. Fellbaum

Function : Author

H. Fonvieille

Function : Author
PersonId : 174974
IdHAL : helene-fonvieille
IdRef : 13848337X

Laboratoire de Physique Corpusculaire - Clermont-Ferrand

R. Gearhart

Function : Author

R. Holmes

Function : Author

E.W. Hughes

Function : Author

J.R. Johnson

Function : Author

D. Kawall

Function : Author

C. Keppel

Function : Author

S.E. Kuhn

Function : Author

R.M. Lombard-Nelsen

Function : Author

J. Marroncle

Function : Author

T. Maruyama

Function : Author

W. Meyer

Function : Author

Z.E. Meziani

Function : Author
PersonId : 755226
ORCID : 0000-0001-9450-2914

H. Middleton

Function : Author

J. Morgenstern

Function : Author

N.R. Newbury

Function : Author

G.G. Petratos

Function : Author

R. Pitthan

Function : Author

R. Prepost

Function : Author

Y. Roblin

Function : Author

Laboratoire de Physique Corpusculaire - Clermont-Ferrand

S.E. Rock

Function : Author

S.H. Rokni

Function : Author

G. Shapiro

Function : Author

T. Smith

Function : Author

P.A. Souder

Function : Author

M. Spengos

Function : Author

F. Staley

Function : Author

L.M. Stuart

Function : Author

Z.M. Szalata

Function : Author

Y. Terrien

Function : Author

A.K. Thompson

Function : Author

J.L. White

Function : Author

M. Woods

Function : Author

J. Xu

Function : Author

C.C. Young

Function : Author

G. Zapalac

Function : Author

Abstract

The neutron longitudinal and transverse asymmetries $A^n_1$ and $A^n_2$ have been extracted from deep inelastic scattering of polarized electrons by a polarized $^3$He target at incident energies of 19.42, 22.66 and 25.51 GeV. The measurement allows for the determination of the neutron spin structure functions $g^n_1 (x,Q^2)$ and $g^n_2(x,Q^2)$ over the range $0.03 < x < 0.6$ at an average $Q^2$ of 2 (GeV$/c)^2$. The data are used for the evaluation of the Ellis-Jaffe and Bjorken sum rules. The neutron spin structure function $g^n_1 (x,Q^2)$ is small and negative within the range of our measurement, yielding an integral ${\int_{0.03}^{0.6} g_1^n(x) dx}= -0.028 \pm 0.006 (stat) \pm 0.006 (syst) $. Assuming Regge behavior at low $x$, we extract $\Gamma_1^n=\int^1_0 g^n_1(x)dx = -0.031 \pm 0.006 (stat)\pm 0.009 (syst) $. Combined with previous proton integral results from SLAC experiment E143, we find $\Gamma_1^p - \Gamma_1^n = 0.160 \pm 0.015$ in agreement with the Bjorken sum rule prediction $\Gamma^p_1 - \Gamma ^n_1 = 0.176 \pm 0.008$ at a $Q^2$ value of 3 (GeV$/c)^2$ evaluated using $\alpha_s = 0.32\pm 0.05$.

Domains

High Energy Physics - Experiment [hep-ex]

Michèle Chadelas : Connect in order to contact the contributor

https://in2p3.hal.science/in2p3-00003582

Submitted on : Thursday, March 25, 1999-11:03:31 AM

Last modification on : Tuesday, August 20, 2024-1:52:20 PM

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in2p3-00003582 , version 1 (25-03-1999)

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HAL Id : in2p3-00003582 , version 1

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P.L. Anthony, R.G. Arnold, H.R. Band, H. Borel, P.E. Bosted, et al.. Deep inelastic scattering of polarized electrons by polarized $^3$He and the study of the neutron spin structure. Physical Review D, 1996, 54, pp.6620-6650. ⟨in2p3-00003582⟩

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Deep inelastic scattering of polarized electrons by polarized $^3$He and the study of the neutron spin structure

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