圈积分及相空间积分计算系列讲座

In this talk, I will introduce a systematic method (inverse unitarity+differential equations+auxiliary mass flow) to calculate phase-space integration for sufficient inclusive processes. With this method, we can get numerical results with high precision efficiently.

Monte-Carlo event generators have been widely used to simulate the processes in high-energy physics. Parton shower plays a central role in Monte-Carlo event generators which provides a reliable tool to perform the leading logarithms resummation. Precision prediction from parton shower requires more theory developments such as proof of NLL resummation and NLO shower framework. Beyond the...

Light-ray operators play an important role in various areas of physics and, in particular, are natural language for an interesting class of observables in collider physics, including energy-energy correlator (EEC). Similar to operator product expansion (OPE) of local operators, OPE of light-ray operators governs the collinear behavior of these observables. In this talk, I will first briefly...

In this talk, I will report on our recent fully analytic calculation of the leading-power contribution to the photon-pion transition form factor at two loops in QCD. The applied techniques rely on hard-collinear factorization, together with modern multi-loop methods. I will focus both on the technical details, such as the treatment of evanescent operators, and the phenomenological...