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arXiv 0709.3253hep-ph
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横向动量相关分布函数之间是否存在近似关系?

Are there approximate relations among transverse momentum dependent distribution functions?

H. Avakian, A. V. Efremov, K. Goeke, A. Metz, P. Schweitzer, T. Teckentrup

摘要:

由QCD运动方程导出的与横动量有关的部分子分布函数之间的某些精确关系,在忽略纯扭3项的情况下,变为近似关系。在HERMES提供的数据的基础上,我们测试了一个这样的“Wandzura-Wilczek型近似”的实用性,即连接h_{1L} ^{ \perp(1)a}(x)到h_L^a(x)的近似,并讨论了如何通过未来的CLAS和COMPASS数据进一步测试它。

英文摘要:

Certain exact relations among transverse momentum dependent parton distribution functions due to QCD equations of motion turn into approximate ones upon the neglect of pure twist-3 terms. On the basis of available data from HERMES we test the practical usefulness of one such ``Wandzura-Wilczek-type approximation'', namely of that connecting h_{1L}^{\perp(1)a}(x) to h_L^a(x), and discuss how it can be further tested by future CLAS and COMPASS data.

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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