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arXiv 2008.07531hep-phnucl-exnucl-th
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DIS中双喷流和重介子对的TMD因子分解

TMD factorization for dijet and heavy-meson pair in DIS

Rafael F. del Castillo, Miguel G. Echevarria, Yiannis Makris, Ignazio Scimemi

摘要:

在Breit框架下,考虑两个硬探针的横向动量不平衡测量,研究了电子-质子对撞机中深度非弹性散射中双喷流和重介子对产生过程的横向动量相关(TMD)分解框架.对于因式分解定理,我们采用软共线和增强重夸克有效场论。这两个过程的因子化截面对胶子非极化和线极化TMD分布敏感,需要引入新的软函数。我们计算新的软功能在这里的一个循环,调节快度发散与$δ$ -调节器。此外,利用因子分解的一致性关系和关于重夸克喷注函数的普适性论证,我们得到了新软函数在两个圈处的反常维数。

英文摘要:

We study a transverse momentum dependent (TMD) factorization framework for the processes of di-jet and heavy meson pair production in deep-inelastic-scattering in an electron-proton collider, considering the measurement of the transverse momentum imbalance of the two hard probes in the Breit frame. For the factorization theorem we employ soft-collinear and boosted-heavy-quark effective field theories. The factorized cross-section for both processes is sensitive to gluon unpolarized and linearly polarized TMD distributions and requires the introduction of a new soft function. We calculate the new soft function here at one loop, regulating rapidity divergences with the $δ$-regulator. In addition, using a factorization consistency relation and a universality argument regarding the heavy-quark jet function, we obtain the anomalous dimension of the new soft function at two loops.

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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