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arXiv 0705.1573hep-ph
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所有的布尔-穆德函数都一样吗?

Are all Boer-Mulders functions alike?

Matthias Burkardt, Brian Hannafious

摘要:

手征奇广义部分子分布(GPD)和Boer-Mulders函数为核子和其他强子中夸克的自旋轨道关联提供了有价值的信息。我们比较结果的相关GPD $\bar{E}^q_T$从各种唯象模型以及最近的晶格结果。我们发现,$\bar{E}^q_T>0$对核子和π介子,以及对$u$和$d$夸克。因此,相应的布尔Mulders函数预期都是负数。$\bar{E}^q_T$的符号来自夸克波函数的上下狄拉克分量之间的相对符号。

英文摘要:

Chirally odd generalized parton distributions (GPDs) and the Boer-Mulders function provide valuable information about spin-orbit correlations for quarks in nucleons and other hadrons. We compare results for the relevant GPD $\bar{E}^q_T$ from a variety of phenomenological models as well as recent lattice results. We find that $\bar{E}^q_T>0$ for nucleons as well as the pion and for both $u$ and $d$ quark. As a result, the corresponding Boer Mulders functions are all expected to be negative. The sign of $\bar{E}^q_T$ arises from the relative sign between the upper and lower Dirac components for the quark wave functions.

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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