第二届微扰量子场论研讨会

Session

Plenary 乙

22 Aug 2022, 14:00

杭州

Contribution list Timetable

17. 形状因子研究新进展

Gang Yang (Institute of Theoretical Physics, CAS)

22/08/2022, 14:00

近些年散射振幅的研究表明，存在不同于传统费曼图的更有效的方式来理解量子场论和量子引力。其中重要的核心思想包括在壳性方法、bootstrap方法，以及一些新的对称性的应用。这些新思路可以发展应用于更一般的含有算符的形状因子等物理量，帮助研究算符分类和重整化、有效场论振幅计算、以及色动量对偶和平方关系等。在这一报告中，我们将介绍形状因子研究的一些新进展及其应用。

18. NLO Sector Showers and NNLO matching

Haitao Li (Shandong University)

22/08/2022, 14:30

We outline a new technique for the fully-differential matching of final-state parton showers to NNLO calculations, focussing here on the simplest case of leptonic collisions with two final-state jets. The strategy is facilitated by working in the antenna formalism, making use of NNLO antenna subtraction on the fixed-order side and the sector-antenna framework on the shower side. As long as the...

22. Axial current renormalization and non-decoupling mass logarithms

Long Chen (Shandong University)

22/08/2022, 14:55

In this talk, I will discuss the renormalization of an axial current associated with a given quark flavor, and the closely related renormalization formulae of the singlet contribution to an axial quark form factor, as well as the renormalization group equations which are used to resum the non-decoupling mass logarithms appearing in the axial quark form factors.

16. Transverse-momentum-dependent wave functions and Soft functions at one-loop in Large Momentum Effective Theory

Jun Zeng (SJTU)

22/08/2022, 15:20

In large-momentum effective theory (LaMET), the transverse-momentum-dependent (TMD) light-front wave functions and soft functions can be extracted from the simulation of a four-quark form factor and equal-time correlation functions. In this work, using expansion by regions we provide a one-loop proof of TMD factorization of the form factor. For the one-loop validation, we also present a...

34. Review on progress in scattering amplitudes and integral reduction

Yang Zhang (University of Science and Technology of China)

22/08/2022, 16:10

Review on progress in scattering amplitudes and integral reduction

4. Reduction of Feynman Integrals in the Parametric Representation

文 陈 (浙大物理系)

22/08/2022, 16:40

We developed a systematic method to reduce Feynman integrals in the parametric representation. This method proves to be more efficient than the integration-by-part (IBP) method in the momentum space. Tensor integrals can directly be parametrized without performing tensor reductions. The integrands of parametric integrals are functions of Lorentz scalars, instead of four momenta. The complexity...

32. Two-loop amplitudes for $tW$ production at Hardron colliders

Dr 烨凡 王

22/08/2022, 17:00

We present the analytical results of the two-loop amplitudes for hadronic tW
production, focusing on the leading color and light fermion-loop contributions. The cal-
culation of the two-loop integrals is performed using the method of canonical differential
equations. The results have been expressed in terms of multiple polylogarithms and checked
by comparing the infra-red divergences with...

26. NNLO corrections to double charmonium production at B factories

Jia-Yue Zhang (高能所)

22/08/2022, 17:20

Exclusive double charmonium production at electron-positron collider is among the simplest hard exclusive reactions in perturbative QCD. The double charmonium production is first observed at two B factories at the beginning of this century and has stimulated long-lasting theoretical interests. The nonrelativistic QCD (NRQCD) factorization approach, a modern effective-field-theory-based...

37. Multi-point energy correlation in N=4 Super Yang-Mills Theory

Kai Yan (Shanghai Jiao Tong University)

Multi-point energy correlation in N=4 Super Yang-Mills Theory