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arXiv 1003.2457hep-phhep-exnucl-ex
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质子中极化海夸克分布的味不对称性

Flavor asymmetry of the polarized sea-quark distributions in the proton

M. Wakamatsu

摘要:

最近对螺旋度部分子分布的全球分析,考虑到从包含和半包含的极化深非弹性散射,以及从RHIC的极化质子-质子散射的可用数据,似乎提供了第一个强有力的证据,极化海夸克分布是味不对称的,即$Δ\bar{u}(x) \ne Δ\bar{d}(x)$。指出它们的分析所表明的味对称性破缺模式,即具有幅度关联$|Δ\bar{u}(x)| < |Δ\bar{d}(x)|$的$Δ\bar{u}(x) > 0$和$Δ\bar{d}(x) < 0$,与我们几年前在手征夸克孤子模型基础上所作的理论预言是一致的.我们也致力于理解这一观察背后的物理学。

英文摘要:

The recent global analysis of helicity parton distributions, which takes into account available data from inclusive and semi-inclusive polarized deep inelastic scattering, as well as from polarized proton-proton scattering at RHIC, appears to offer the first strong evidence that polarized sea-quark distributions are flavor asymmetric, i.e. $Δ\bar{u}(x) \ne Δ\bar{d}(x)$. We point out that the flavor symmetry breaking pattern indicated by their analysis, i.e. $Δ\bar{u}(x) > 0$ and $Δ\bar{d}(x) < 0$ with the magnitude correlation $|Δ\bar{u}(x)| < |Δ\bar{d}(x)|$, is just consistent with our theoretical predictions given several years ago on the basis of the chiral quark soliton model. We also address ourselves to understanding the physics behind this observation.

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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