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题名: Quark distributions of octet baryons from SU(3) symmetry
作者: Ma, BQ ;  Schmidt, I ;  Soffer, J ;  Yang, JJ
刊名: PHYSICAL REVIEW D
出版日期: 2002
卷号: 65, 期号:3, 页码:-
关键词: PARTON DISTRIBUTION-FUNCTIONS ;  TO-LEADING-ORDER ;  LAMBDA-POLARIZATION ;  (LAMBDA)OVER-BAR POLARIZATION ;  ANTIQUARK ASYMMETRY ;  FRAGMENTATION FUNCTIONS ;  SPIN STRUCTURE ;  NUCLEON SEA ;  E(+)E(-) ANNIHILATION ;  QCD ANALYSIS
学科分类: Physics
通讯作者: Ma, BQ , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
部门归属: Peking Univ, Dept Phys, Beijing 100871, Peoples R China; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile; CNRS, Ctr Phys Theor, F-13288 Marseille, France; Nanjing Normal Univ, Dept Phys, Nanjing 210097, Peoples R China
英文摘要: SU(3) symmetry relations between the octet baryons are introduced in order to connect both the unpolarized and polarized quark distributions of the octet baryons with those of the nucleon. Two different parametrizations of the nucleon quark distributions are used. A new scenario of quark flavor and spin structure of the Lambda is found and compared with two other models: a perturbative QCD based analysis and a quark diquark model. The it and d quarks inside the Lambda are predicted to be positively polarized at a large Bjorken variable x in the new scenario. By using an approximate relation connecting the quark fragmentation functions with the quark distributions, the hadron polarizations of the octet baryons in e(+) e(-) annihilation, polarized charged lepton deep-inelastic scattering (DIS) processes, and neutrino (antineutrino) DIS processes are predicted. The predictions for Lambda polarizations in several processes are compatible with the available data at a large fragmentation momentum fraction z, and support the prediction of positively polarized it and d quarks inside the Lambda at large x. Predictions for Drell-Yan processes from Sigma(+/-) and Xi(-) beams on an isoscalar target are also given and discussed.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000173793300023
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13609
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Ma, BQ,Schmidt, I,Soffer, J,et al. Quark distributions of octet baryons from SU(3) symmetry[J]. PHYSICAL REVIEW D,2002,65(3):-.
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