Joint INFN-UNIMI-UNIMIB Pheno Seminars

Scattering Amplitudes at higher orders in QCD

by Dr Anurag Tripathi (IIT Hyderabad)

Aula Polvani (Università degli Studi di Milano)

Aula Polvani

Università degli Studi di Milano

Via Celoria 16, 20133 Milano
Scattering amplitudes involving multiple partons are plagued with infrared singularities. The soft singularities
of the amplitudes are captured by the soft function which is defined as the vacuum expectation value of Wilson
line correlators. Renormalization properties of soft function allows us to write it as an exponential of the finite
soft anomalous dimension. An efficient way to study the soft function is through a set of Feynman diagrams
known as Cwebs (webs). In this talk I will discuss the progress that has been made by our group in the last
couple of years in understanding the structure and the building blocks of Cwebs