# ICHEP 2020

28 July 2020 to 6 August 2020
virtual conference
Europe/Prague timezone

## Universal features of the medium-induced gluon cascade and jet quenching in expanding media

28 Jul 2020, 18:30
24m
virtual conference

#### virtual conference

Talk 07. Heavy Ions

### Speaker

Dr Souvik Priyam Adhya (Institute of Particle and Nuclear Physics Faculty of Mathematics and Physics, Charles University)

### Description

We present a study of the impact of the expansion of deconfined medium on single-gluon emission spectra and the jet suppression factor ($𝑄_{𝐴𝐴}$) within the BDMPS-Z formalism. These quantities are calculated for three types of media (static medium, exponentially decaying medium and Bjorken expanding medium). The distribution of medium-induced gluons and the jet $𝑄_{𝐴𝐴}$ are calculated using the evaluation of in-medium evolution with splitting kernels derived from the gluon emission spectra. A universal behavior of splitting kernels is derived for low-𝑥 and high-𝑥 regimes in the asymptote of large times and its impact on the resulting jet $𝑄_{𝐴𝐴}$ is discussed. For the full phase-space of the radiation, the scaling of jet $𝑄_{𝐴𝐴}$ with an effective quenching parameter is derived. The importance of the medium expansion for precise modeling of jet quenching phenomena as well as steps towards generalizing the results to other jet quenching observables are discussed.

### Primary author

Dr Souvik Priyam Adhya (Institute of Particle and Nuclear Physics Faculty of Mathematics and Physics, Charles University)

### Co-authors

Carlos Albert Salgado Lopez (Universidade de Santiago de Compostela (ES)) Martin Spousta (Charles University) Dr Konrad Tywoniuk (University of Bergen (NO))