Higgs Production at Large Transverse Momentum

报告题目：Higgs Production at Large Transverse Momentum

报 告 人：张家伟

时    间：2022年02月16日（14:30-16:00）

地    点：物理学院LE201

报告摘要：

The transverse momentum distribution of the Higgs at large is complicated by its dependence on three important energy scales:, the top quark mass , and the Higgs mass . A strategy for simplifying the calculation of the cross section at large  is to calculate only the leading terms in its expansion in  and/or . The expansion of the cross section in inverse powers of is complicated by logarithms of and by mass singularities. As an example, we consider the top-quark/bottom-quark loop contribution to the subprocess  at leading order in . We show that the leading power of  can be expressed in the form of a factorization formula that separates the large scale from the scale of the masses. All the dependence on  / and  can be factorized into a distribution amplitude for  in the Higgs, a distribution amplitude for  in a real gluon, and an endpoint contribution. The factorization formula can be used to simplify calculations of the distribution at large to next-to-leading order in . The results are readily applied to the  process via a straightforward analytical continuation.

报告人简介：

张家伟，2011年于重庆大学物理学院获博士学位，师从方祯云教授和吴兴刚教授，2011年就职于重庆科技学院。 2016年3月-2017年3月俄亥俄州立大学物理系国家公派访学一年，合作导师 Eric Braaten 教授。目前从事重味强子，QCD因子化理论，标准模型精确检验等相关研究。先后在JHEP、Phys. Rev. D、Eur. Phys. J. C等国际主流杂志发表论文15余篇。