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
收藏
页码：367 / 373
页数：7
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