LIMIT ON THE (D)BAR-(U)BAR ASYMMETRY OF THE NUCLEON SEA FROM DRELL-YAN PRODUCTION

被引：56

作者：

MCGAUGHEY, PL

MOSS, JM

ALDE, DM

BAER, HW

CAREY, TA

GARVEY, GT

KLEIN, A

LEE, C

LEITCH, MJ

LILLBERG, JW

MISHRA, CS

PENG, JC

BROWN, CN

COOPER, WE

HSIUNG, YB

ADAMS, MR

GUO, R

KAPLAN, DM

MCCARTHY, RL

DANNER, G

WANG, MJ

BARLETT, ML

HOFFMANN, GW

机构：

[1] NO ILLINOIS UNIV,DE KALB,IL 60115

[2] UNIV TEXAS,AUSTIN,TX 78712

[3] FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510

[4] SUNY STONY BROOK,STONY BROOK,NY 11794

[5] UNIV ILLINOIS,CHICAGO,IL 60680

[6] CASE WESTERN RESERVE UNIV,CLEVELAND,OH 44106

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.69.1726

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present an analysis of 800 GeV proton-induced Drell-Yan production data from isoscalar (IS) targets H-2 and C, and from W, which has a large neutron excess. The ratio of cross sections per nucleon, R = sigma(W)/sigma(IS), is sensitive to the difference between the dBAR(x) and uBAR(x structure functions of the proton. We find that R is close to unity in the range 0.04 less-than-or-equal-to x less-than-or-equal-to 0.27, allowing upper limits to be set on the dBAR-uBAR asymmetry. Additionally, the shape of the differential cross section m3 d2-sigma/dx(F) dm for H-2 at x(F) almost-equal-to 0 shows no evidence of an asymmetric sea in the proton. We examine the implications of these data for various models of the violation of the Gottfried sum rule in deep-inelastic lepton scattering.

引用

页码：1726 / 1728

页数：3

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