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arXiv 1808.00565hep-ph
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包含DIS和新的TMD求和规则的横截性

Transversity in inclusive DIS and novel TMD sum rules

Alberto Accardi, Andrea Signori

摘要:

对包含性深非弹性散射的共线因式分解的再分析表明,在足够大的Bjorken $x_B$下,与产生的强子的不变质量耦合的一种新的、非微扰的自旋翻转项与目标的横向分布函数相关联。由此产生的新贡献的$g_2$结构功能可以潜在地解释最近的计算和拟合这个数量之间的差异。新术语还打破了Burkhartt-Cottingham求和规则,现在具有$g_2$和$h_1$函数之间的相互作用,这要求重新检查它们的小$x$行为。作为导致这些结果的计算的一部分,一组新的TMD求和规则是通过将单强子夸克碎裂相关器与通过强子动量和自旋积分的完全穿戴的夸克传播子相关联而导出的。得到了一套完整的动量和规则,适用于横动量相关的夸克碎裂函数,直到次主导扭曲。

英文摘要:

A reanalysis of collinear factorization for inclusive Deep Inelastic Scattering shows that a novel, non perturbative spin-flip term associated with the invariant mass of the produced hadrons couples, at large enough Bjorken $x_B$, to the target's transversity distribution function. The resulting new contribution to the $g_2$ structure function can potentially explain the discrepancy between recent calculations and fits of this quantity. The new term also breaks the Burkhardt-Cottingham sum rule, now featuring an interplay between the $g_2$ and $h_1$ functions that calls for a re-examination of their small-$x$ behavior. As part of the calculation leading to these results, a new set of TMD sum rules is derived by relating the single-hadron quark fragmentation correlator to the fully dressed quark propagator by means of integration over the hadronic momenta and spins. A complete set of momentum sum rules is obtained for transverse-momentum-dependent quark fragmentation functions up to next-to-leading twist.

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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