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

被引：335

作者：

Anthony, PL ^{[8
]}

Arnold, RG

Band, HR

Borel, H

Bosted, PE

Breton, V

Cates, GD

Chupp, TE

Dietrich, FS

Dunne, J

Erbacher, R

Fellbaum, J

Fonvieille, H

Gearhart, R

Holmes, R

Hughes, EW

Johnson, JR

Kawall, D

Keppel, C

Kuhn, SE

LombardNelsen, RM

Marroncle, J

Maruyama, T

Meyer, W

Meziani, ZE

Middleton, H

Morgenstern, J

Newbury, NR

Petratos, GG

Pitthan, R

Prepost, R

Roblin, Y

Rock, SE

Rokni, SH

Shapiro, G

Smith, T

Souder, PA

Spengos, M

Staley, F

Stuart, LM

Szalata, ZM

Terrien, Y

Thompson, AK

White, JL

Woods, M

Xu, J

Young, CC

Zapalac, G

机构：

[1] AMERICAN UNIV, WASHINGTON, DC 20016 USA

[2] UNIV CLERMONT FERRAND, PHYS CORPUSCULAIRE LAB, INST NATL PHYS NUCL & PHYS PARTICULES, CNRS, F-63170 CLERMONT FERRAND, FRANCE

[3] UNIV CALIF BERKELEY, BERKELEY, CA 94720 USA

[4] UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA

[5] CALTECH, PASADENA, CA 91125 USA

[6] CENS, DEPT ASTROPHYS PHYS PARTICLES PHYS NUCL INSTRUMEN, SERV PHYS NUCL, F-91191 GIF SUR YVETTE, FRANCE

[7] KENT STATE UNIV, KENT, OH 44242 USA

[8] LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA

[9] UNIV MICHIGAN, ANN ARBOR, MI 48109 USA

[10] NIST, GAITHERSBURG, MD 20899 USA

[11] OLD DOMINION UNIV, NORFOLK, VA 23529 USA

[12] PRINCETON UNIV, PRINCETON, NJ 08544 USA

[13] STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94309 USA

[14] STANFORD UNIV, STANFORD, CA 94305 USA

[15] SYRACUSE UNIV, SYRACUSE, NY 13210 USA

[16] TEMPLE UNIV, PHILADELPHIA, PA 19122 USA

[17] UNIV WISCONSIN, MADISON, WI 53706 USA

来源：

PHYSICAL REVIEW D | 1996年 / 54卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.54.6620

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The neutron longitudinal and transverse asymmetries A(1)(n) and A(2)(n) have been extracted from deep inelastic scattering of polarized electrons by a polarized He-3 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(1)(n)(x,Q(2)) and g(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(1)(n)(x,Q(2)) is small and negative within the range of our measurement, yielding an integral f(0.03)(0.6)g(1)(n)(x)dx = -0.028 +/- 0.006 (stat) +/- 0.006 (syst). Assuming Reggae behavior at low x, we extract Gamma(1)(n) = f(0)(1)g(1)(n)(x)dx = -0.031 +/- 0.006 (stat) +/- 0.009 (syst). Combined with previous proton integral results from SLAC experiment E143, we find Gamma(1)(p) - Gamma(1)(n) = 0.160 +/- 0.015 in agreement with the Bjorken sum rule prediction Gamma(1)(p) - Gamma(1)(n) = 0.176 +/- 0.008 at a Q(2) value of 3 (GeV/c)(2) evaluated using alpha(s) = 0.32 +/- 0.05.

引用

页码：6620 / 6650

页数：31

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