Determination of flavor asymmetry for Sigma(+/-) by the Drell-Yan process

被引：33

作者：

Alberg, M

Henley, EM

Ji, XD

Thomas, AW

机构：

[1] UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195

[2] UNIV WASHINGTON,NATL INST NUCL THEORY,SEATTLE,WA 98195

[3] MIT,CTR THEORET PHYS,NUCL SCI LAB,CAMBRIDGE,MA 02139

[4] MIT,DEPT PHYS,CAMBRIDGE,MA 02139

[5] UNIV ADELAIDE,DEPT PHYS & MATH PHYS,ADELAIDE,SA 5005,AUSTRALIA

[6] UNIV ADELAIDE,INST THEORET PHYS,ADELAIDE,SA 5005,AUSTRALIA

来源：

PHYSICS LETTERS B | 1996年 / 389卷 / 02期

基金：

澳大利亚研究理事会;

关键词：

D O I：

10.1016/S0370-2693(96)01272-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Flavor asymmetries for the valence and sea quarks of the Sigma(+/-) can be obtained from Drell-Yan experiments using charged hyperon beams on proton and deuteron targets. A large, measurable difference in sea quark asymmetries is predicted between SU(3) and pseudoscalar meson models. The latter predict that in Sigma(+), (u) over bar/(d) over bar less than or equal to 1/2, whereas the former predict (u) over bar/(d) over bar approximate to 4/3. Estimates of valence quark asymmetries based on quark models also show large deviations from SU(3) predictions, which should be measurable.

引用

页码：367 / 373

页数：7