Abstract: Infrared singular factors derived from the factorisation of QCD scattering amplitudes in soft and collinear limits play an important role in the organisation and calculation of higher-order contributions to various jet cross sections. In this talk, I will discuss the application of collinear factorisation in predicting logarithmically-enhanced contributions to the observable of interest, and thus improving theoretical accuracy through the resummation formalism. For the transverse-momentum dependent observables, we show how collinear functions can be defined without introducing what is known as rapidity divergences in the literature. We present analytical expressions for the collinear functions up to next-to-next-to-leading order in perturbation theory.

Meeting ID: 926 6031 3581
Passcode: 570875