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arXiv 1807.07573hep-phnucl-th
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有喷流的横向动量分布

Transverse momentum dependent distributions with jets

Daniel Gutierrez-Reyes, Ignazio Scimemi, Wouter J. Waalewijn, Lorenzo Zoppi

摘要:

我们调查使用射流测量横向动量相关分布(TMD)。我们使用的例子来介绍我们的框架是在轻子对撞机的dijet动量去相关。将这种动量去相关转化为角度$θ\ll 1$,我们分析了$θ\gg R$、$θ\sim R$和$θ\ll R$情况下的截面因式分解,其中$R$是喷流半径。关键的是,对于赢家通吃轴,射流TMD具有与所有半径$R$的TMD碎裂函数相同的双尺度重整化群演化。然后,因子分解定理中的TMD碎裂函数可以简单地被我们计算的射流TMD所取代,并且可以获得执行下一个到下一个到领先的对数精度的重新计算的所有成分。我们的方法也适用于半包容性的深非弹性散射(SIDIS),其中喷流,而不是强子在最终状态下测量,我们找到了一个干净的方法来探测夸克和胶子在质子中的固有横向动量,是不太敏感的最终状态非微扰效应。

英文摘要:

We investigate the use of jets to measure transverse momentum dependent distributions (TMDs). The example we use to present our framework is the dijet momentum decorrelation at lepton colliders. Translating this momentum decorrelation into an angle $θ\ll 1$, we analyze the factorization of the cross section for the cases $θ\gg R$, $θ\sim R$ and $θ\ll R$, where $R$ is the jet radius. Critically, for the Winner-Take-All axis, the jet TMD has the same double-scale renormalization group evolution as TMD fragmentation functions for all radii $R$. TMD fragmentation functions in factorization theorems may then simply be replaced by the jet TMDs we calculate, and all ingredients to perform the resummation to next-to-next-to-leading logarithmic accuracy are available. Our approach also applies to semi-inclusive deep inelastic scattering (SIDIS), where a jet instead of a hadron is measured in the final state, and we find a clean method to probe the intrinsic transverse momentum of quarks and gluons in the proton that is less sensitive to final-state nonperturbative effects.

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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