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arXiv 2009.04808hep-phhep-ex
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奇异夸克极化对味SU(3)对称性破缺的敏感性

Sensitivity of strange quark polarization to flavor SU(3) symmetry breaking

Ali Khorramian, Elliot Leader, Dimiter Stamenov, Amir Shabanpour

摘要:

极化奇夸克之谜涉及这样一个事实,即从极化包含的深非弹性散射数据中提取的极化奇夸克密度是显著负的,而当从极化半包含和包含的深非弹性数据的组合分析中提取时,它是零或略正的。SU(3)味对称性在包含分析中起着重要的作用,它通常被认为不是一种精确对称性,所有提取的极化夸克密度在某种程度上依赖于引入的对称性破缺的水平。但到目前为止,对破裂最敏感的是奇异夸克密度。本文利用极化的DIS质子、中子和氘核数据,包括最终的JLAB CLAS/EG 1b质子和氘核数据,对世界数据进行了非线性光学QCD分析,研究了奇异夸克极化对味SU(3)破缺的敏感性。

英文摘要:

The polarized strange quark puzzle concerns the fact that the polarized strange quark density extracted from polarized inclusive deep inelastic scattering data is significantly negative, whereas it is zero or slightly positive when extracted from a combined analysis of polarized semi-inclusive and inclusive deep inelastic data. SU(3) flavor symmetry, which, it is generally accepted, is not an exact symmetry, plays an important role in the inclusive analysis, and all the extracted polarized quark densities depend, to some extent, on the level of symmetry breaking introduced. But by far the most sensitive to the breaking is the strange quark density. In this paper we present a NLO QCD analysis of the world data on polarized inclusive DIS data on protons, neutrons and deuterons, including the final JLAB CLAS/EG1b data on the proton and deuteron, and study the sensitivity of the strange quark polarization to the breaking of flavor SU(3).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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