Measurement of the neutron spin structure function g(2)(n) and asymmetry A(2)(n)

被引：86

作者：

Abe, K

Akagi, T

Anderson, BD

Anthony, PL

Arnold, RG

Averett, T

Band, HR

Berisso, CM

Bogorad, P

Borel, H

Bosted, PE

Breton, V

Buenerd, MJ

Cates, GD

Chupp, TE

Churchwell, S

Coulter, KP

Daoudi, M

Decowski, P

Erickson, R

Fellbaum, JN

Fonvieille, H

Gearhart, R

Ghazikhanian, V

Griffioen, KA

Hicks, RS

Holmes, R

Hughes, EW

Igo, G

Incerti, S

Johnson, JR

Kahl, W

Khayat, M

Kolomensky, YG

Kuhn, SE

Kumar, K

Kuriki, M

LombardNelsen, R

Manley, DM

Marroncle, J

Maruyama, T

Marvin, T

Meyer, W

Meziani, ZE

Miller, D

Mitchell, G

Olson, M

Peterson, GA

Petratos, GG

Pitthan, R

机构：

[1] AMERICAN UNIV, WASHINGTON, DC 20016 USA

[2] UNIV CLERMONT FERRAND, LPC, CNRS, IN2P3, F-63170 AUBIERE, FRANCE

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

[4] UNIV CALIF LOS ANGELES, LOS ANGELES, CA 90024 USA

[5] CALTECH, PASADENA, CA 91125 USA

[6] CTR ETUD SACLAY, SPHN, DAPNIA, F-91191 GIF SUR YVETTE, FRANCE

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

[8] UNIV MASSACHUSETTS, AMHERST, MA 01003 USA

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

[10] NATL INST STAND & TECHNOL, GAITHERSBURG, MD 20899 USA

[11] NORTHWESTERN UNIV, EVANSTON, IL 60201 USA

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

[13] UNIV PENN, PHILADELPHIA, PA 19104 USA

[14] PRINCETON UNIV, PRINCETON, NJ 08544 USA

[15] SMITH COLL, NORTHAMPTON, MA 01063 USA

[16] SO OREGON STATE COLL, ASHLAND, OR 97520 USA

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

[18] SYRACUSE UNIV, SYRACUSE, NY 13210 USA

[19] TEMPLE UNIV, PHILADELPHIA, PA 19122 USA

[20] COLL WILLIAM & MARY, WILLIAMSBURG, VA 23187 USA

[21] UNIV WISCONSIN, MADISON, WI 53706 USA

[22] CNRS, INST NUCL SCI, IN2P3, F-38026 GRENOBLE, FRANCE

[23] RUHR UNIV BOCHUM, D-44780 BOCHUM, GERMANY

来源：

PHYSICS LETTERS B | 1997年 / 404卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(97)00613-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have measured the neutron structure function g(2)(n) and the virtual photon-nucleon asymmetry A(2)(n) over the kinematic range 0.014 less than or equal to x less than or equal to 0.7 and 1.0 less than or equal to Q(2) less than or equal to 17.0 by scattering 48.3 GeV longitudinally polarized electrons from polarized He-3. Results for A(2)(n) are significantly smaller than the root R positivity limit over most of the measured range and data for g(2)(n), are generally consistent with the twist-2 Wandzura-Wilczek prediction. Using our measured g(2)(n) we obtain results for the twist-3 reduced matrix element d(2)(n), and the integral integral g(2)(n)(x) dx in the range 0.014 less than or equal to x less than or equal to 1.0. Data from this experiment are combined with existing data for g(2)(n) to obtain an average for d(2)(n) and the integral integral g(2)(n)(x) dx. (C) 1997 Published by Elsevier Science B.V.

引用

页码：377 / 382

页数：6

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