Quark distributions of octet baryons from SU(3) symmetry
文献类型：期刊论文
| 作者 | Ma, BQ; Schmidt, I; Soffer, J; Yang, JJ; Ma, BQ , Peking Univ, Dept Phys, Beijing 100871, Peoples R China. |
| 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 |
| ISSN号 | 0556-2821 |
| 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. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000173793300023 |
| 公开日期 | 2012-08-29 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/13609]  |
| 专题 | 理论物理研究所_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. |
| 推荐引用方式 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):-. |
入库方式： OAI收割
来源：理论物理研究所
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