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Quark distributions of octet baryons from SU(3) symmetry
Ma, BQ; Schmidt, I; Soffer, J; Yang, JJ; Ma, BQ , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
2002
发表期刊PHYSICAL REVIEW D
ISSN0556-2821
卷号65期号:3页码:-
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.
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
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
学科领域Physics
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收录类别SCI
WOS记录号WOS:000173793300023
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13609
专题理论物理所1978-2010年知识产出
通讯作者Ma, BQ , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.
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GB/T 7714
Ma, BQ,Schmidt, I,Soffer, J,et al. Quark distributions of octet baryons from SU(3) symmetry[J]. PHYSICAL REVIEW D,2002,65(3):-.
APA Ma, BQ,Schmidt, I,Soffer, J,Yang, JJ,&Ma, BQ , Peking Univ, Dept Phys, Beijing 100871, Peoples R China..(2002).Quark distributions of octet baryons from SU(3) symmetry.PHYSICAL REVIEW D,65(3),-.
MLA Ma, BQ,et al."Quark distributions of octet baryons from SU(3) symmetry".PHYSICAL REVIEW D 65.3(2002):-.
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