Speaker: Dr. 徐小峰 （University of Bern）
腾讯会议 ID: 592 157 262 Passcode: 200438
Abstract：The soft radiation emitted in jet cross sections can resolve the directions and colors of individual hard partons, leading to a complicated pattern of logarithmically enhanced terms in the perturbative series. Starting from a factorization theorem and solving the renormalization group equations for its ingredients, these large logarithms can be resummed. In the talk, I will explain how to extract the two-loop anomalous dimension governing the resummation of subleading logarithms in jet cross sections and other non-global observables. This anomalous dimension can be obtained by considering soft limits of hard amplitudes, but the presence of collinear singularities in intermediate expressions makes its extraction delicate. As a consistency check, I will use the results to predict the known subleading non-global logarithms in the two-jet cross section.
报告视频：https://cloud.fudan.edu.cn/#routeview/s/Mujduu4Y