SOFFER POSITIVITY BOUND AND A SUGGESTION FOR MEASURING VALENCE QUARK TRANSVERSE SPIN DISTRIBUTIONS AT BNL RHIC

被引：16
作者：
SIVERS, D
机构：
[1] Portland Physics Institute, Portland, OR 97201
来源：
PHYSICAL REVIEW D | 1995年 / 51卷 / 09期
关键词：
D O I：
10.1103/PhysRevD.51.4880
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A positivity bound obtained by Soffer severely restricts the magnitude of quark transverse spin distributions for those quark flavors with negative longitudinal polarization. Since the interpretation of lepton scattering data on longitudinally polarized protons suggests a strong negative longitudinal polarization for antiquarks in the sea, a hard-scattering process which depends only on the transverse spin distribution of valence u quarks should be investigated. The large transverse-momentum production processes ANNdσ(pp→π+X) and ANNdσ(pp→π+p+X) could be considered a backup to the measurement of ANNdσ(pp→γ(Q2)X) and other production processes involving antiquarks. © 1995 The American Physical Society.
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页码：4880 / 4883
页数：4
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