Classical and quantum corrections to jet broadening

by Jacopo GHIGLIERI

Thursday 22 Feb 2024, 16:00 → 17:30 Europe/Zurich

4/2-037 (CERN)

The transverse momentum broadening coefficient qhat receives both soft, classical and radiative, quantum corrections. The former are responsible for a large O(g) correction, whereas the latter enter at relative order $g^2$, but are enhanced by a double logarithm of the length of the medium over the thermal wavelength.In this talk I first introduce both classes of corrections, to then analyze quantum ones in a weakly-coupled quark-gluon plasma.
I will show how a thermal population of dynamical gluons changes the boundaries and reduces the size of the double-logarithmic phase space. It also provides new subdominant logarithmic corrections. I will also show how the quantum, double-logarithmic and classical, soft phase spaces are smoothly connected once the radiated gluon becomes soft enough.