Measurements of the Q2-dependence of the proton and neutron spin structure functions g1p and g1n

被引：309

作者：

Anthony, PL ^{[1
]}

Arnold, RG

Averett, T

Band, HR

Berisso, MC

Borel, H

Bosted, PE

Bültmann, SL

Buenerd, M

Chupp, T

Churchwell, S

Court, GR

Crabb, D

Day, D

Decowski, P

DePietro, P

Erbacher, R

Erickson, R

Feltham, A

Fonvieille, H

Frlez, E

Gearhart, R

Ghazikhanian, V

Gomez, J

Griffioen, KA

Harris, C

Houlden, MA

Hughes, EW

Hyde-Wright, CE

Igo, G

Incerti, S

Jensen, J

Johnson, JR

King, PM

Kolomensky, YG

Kuhn, SE

Lindgren, R

Lombard-Nelsen, RM

Marroncle, J

McCarthy, J

McKee, P

Meyer, W

Mitchell, GS

Mitchell, J

Olson, M

Penttila, S

Peterson, GA

Petratos, GG

Pitthan, R

Pocanic, D

机构：

[1] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA

[2] American Univ, Washington, DC 20016 USA

[3] Univ Basel, Inst Phys, CH-4056 Basel, Switzerland

[4] Univ Blaise Pascal, LPC, IN2P3, CNRS, F-63170 Aubiere, France

[5] Ruhr Univ Bochum, D-4630 Bochum, Germany

[6] CALTECH, Pasadena, CA 91125 USA

[7] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[8] CEA Saclay, DAPNIA, Serv Phys Nucl, F-91191 Gif Sur Yvette, France

[9] Florida Int Univ, Miami, FL 33199 USA

[10] Kent State Univ, Kent, OH 44242 USA

[11] Univ Liverpool, Liverpool L69 3BX, Merseyside, England

[12] Univ Calif Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[13] Univ Massachusetts, Amherst, MA 01003 USA

[14] Univ Michigan, Ann Arbor, MI 48109 USA

[15] Old Dominion Univ, Norfolk, VA 23529 USA

[16] Smith Coll, Northampton, MA 01063 USA

[17] Stanford Univ, Stanford, CA 94305 USA

[18] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

[19] Univ Virginia, Charlottesville, VA 22901 USA

[20] Coll William & Mary, Williamsburg, VA 23187 USA

[21] Univ Wisconsin, Madison, WI 53706 USA

来源：

PHYSICS LETTERS B | 2000年 / 493卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(00)01014-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The structure functions g(1)(p) and g(1)(n) have been measured over the range 0.014 < x < 0.9 and 1 < Q(2) < 40 GeV2 using deep-inelastic scattering of 48 GeV longitudinally polarized electrons from polarized protons and deuterons. We find that the Q(2) dependence of g(1)(p) (g(1)(n)) at fixed x is very similar to that of the spin-averaged structure function F-1(p) (F-1(n)). From an NLO QCD fit to all available data we And Gamma (p)(1) - Gamma (n)(1) = 0.176 +/- 0.003 +/- 0.007 at Q(2) = 5 GeV2, in agreement with the Bjorken sum rule prediction of 0.182 +/- 0.005. (C) 2000 Published by Elsevier Science B.V.

引用

页码：19 / 28

页数：10

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