5. Theoretical Physics (CSN4)

Understanding the building blocks of the colour structure of the multi-parton scattering amplitudes beyond 3 loops

by Anurag Tripathi (IIT Hyderabad, India)

Aula Seminari (Laboratori Nazionali di Frascati)

Aula Seminari

Laboratori Nazionali di Frascati


Scattering amplitudes involving multiple partons are plagued with infrared singularities. The soft singularities are captured by the soft function which is defined as the vacuum expectation value of Wilson line correlators.
Renormalization properties allow 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. 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.