Speaker
Description
In heavy ion collisions at high energies the hot and dense medium of a quark-gluon plasma (QGP) can be recreated and investigated.
We study how jets that were produced in hard binary collisions propagate and in particular how the jet-particle momentum components $k_T$ transverse to the jet-axis change.
To this end, we evolved jets within a QGP medium, in which they undergo both medium induced coherent radiation as well as scatterings that involve transverse kicks,
using the MINCAS-algorithm [1] that is based on the works of [2,3].
In this framework parton branching occurs simultaneously to scatterings within the medium, leading to the interference effects that reproduce the well known BDMPS-Z emission rates.
In the most general form the resulting parton branchings also give rise to a sizeable $k_T$ broadening.
Thus, it is interesting to compare the relative importances of $k_T$ broadening from the coherent splittings and different types of in-medium scatterings.
We find a clear hierarchy of the influences from different scattering effects and deflections during branchings [4]:
While scattering still yields the largest contributions to broadening, the branching effects are comparable in size.
However, we find that with increasing strength of jet-medium interactions $k_T$ broadening even decreases in some of the studied cases, due to
the interplay of scattering and energy loss due to branching.
References:
[1] K. Kutak, W. Płaczek, R. Straka, Eur.Phys.J. C79 (2019) no.4, 317
[2] J.-P. Blaizot, F. Dominguez, E. Iancu, Y. Mehtar-Tani, JHEP 1301 (2013) 143
[3] J.-P. Blaizot, F. Dominguez, E. Iancu, Y. Mehtar-Tani, JHEP 1406 (2014) 075
[4] E. Blanco, K. Kutak, W. Płaczek, M. Rohrmoser, R. Straka, JHEP 04 (2021) 014
