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Flavor and spin structure of Lambda-baryon at large x
Ma BQ(马伯强); Ma, BQ; Schmidt, I; Yang, JJ
2000
发表期刊PHYSICS LETTERS B
卷号477期号:1-3页码:#REF!
通讯作者Ma, BQ (reprint author), Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
文章类型Article
摘要It is shown that a perturbative QCD (pQCD) based analysis and the SU(6) quark-diquark model give significant different predictions concerning the flavor and spin structure for the quark distributions of the Lambda-baryon near x=1. Detailed predictions for the ratios u(x)/s(x) of unpolarized quark distributions, Delta s(x)/s(x) of valence strange quark, and Delta u(x)/u(x) of valence up and down quarks of the ii are given from the quark-diquark model and from a pQCD based model. It is found that the up and down quarks are positively polarized at larger, even though their net spin contributions to the Lambda might be zero or negative. The significant difference for u(x)/s(x) between the two different approaches are predicted. The prediction of positively polarized up and down quarks inside the Lambda at large x has been supported by the available data of Lambda-polarization in Z decays and also by the most recent HERMES result of spin transfer to the Lambda in deep elastic scattering of polarized lepton on the nucleon target. (C) 2000 Published by Elsevier Science B.V. All rights reserved.
学科领域Physics
DOI10.1016/S0370-2693(00)00167-2
收录类别SCI
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000086203000016
引用统计
被引频次:50[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226197
专题理论物理室
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GB/T 7714
Ma BQ,Ma, BQ,Schmidt, I,et al. Flavor and spin structure of Lambda-baryon at large x[J]. PHYSICS LETTERS B,2000,477(1-3):#REF!.
APA 马伯强,Ma, BQ,Schmidt, I,&Yang, JJ.(2000).Flavor and spin structure of Lambda-baryon at large x.PHYSICS LETTERS B,477(1-3),#REF!.
MLA 马伯强,et al."Flavor and spin structure of Lambda-baryon at large x".PHYSICS LETTERS B 477.1-3(2000):#REF!.
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