The Physics of Soft and Collinear Gluons
Prof. Lorenzo Magnea (Universita di Torino, Italy)

The radiation of soft and collinear gluons encodes information on the long-range interactions of gauge fields, and is responsible for large corrections to physical cross sections that are important for collider phenomenology. I will review our understanding of this radiation within QCD, including recent significant progress shedding light on its structure all order in perturbation theory.
Soft and collinear singularities are organized in terms of a quantum field theory involving Wilson lines as well as local operators.
For multiparticle amplitudes involving massless particles, a simple sum-over-dipoles formula emerges, which may encode all soft and collinear singularities for any massless gauge theory.