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
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
收藏
页码:6620 / 6650
页数:31
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