# QM 2022

Apr 4 – 10, 2022
Auditorium Maximum UJ
Europe/Warsaw timezone

## Multipartonic cascades in expanding media

Apr 5, 2022, 6:10 PM
20m
large aula A (Auditorium Maximum UJ)

### large aula A

#### Auditorium Maximum UJ

Oral presentation Jets, high-pT hadrons, and medium response

### Speaker

Mr Souvik Priyam Adhya (Institute of Nuclear Physics, Polish Academy of Sciences)

### Description

In this work, we introduce both gluon and quark degrees of freedom for describing the partonic cascades inside the medium. We present numerical solutions for the set of coupled evolution equations with splitting kernels calculated for the static, exponential and Bjorken expanding media to arrive at medium-modified parton spectra for quark and gluon initiated jets respectively. We discuss novel scaling features of the partonic spectra between different types of media. Next, we study the inclusive jet $R_{AA}$ by including phenomenologically driven combinations of quark and gluon fractions inside a jet. In addition, we have also studied the effect of the nPDF as well as vacuum like emissions on the jet $R_{AA}$. Differences among the estimated values of quenching parameter for different types of medium expansions are noted. Next, the impact of the expansion of the medium on the rapidity dependence of the jet $R_{AA}$ as well as jet $v_2$ are studied in detail. Finally, we present qualitative results comparing the sensitivity of the time for the onset of the quenching for the Bjorken profile on these observables. All the quantities calculated are compared with the recent ATLAS data.

### Primary authors

Carlos Albert Salgado Lopez (Universidade de Santiago de Compostela (ES)) Mr Souvik Priyam Adhya (Institute of Nuclear Physics, Polish Academy of Sciences) Konrad Tywoniuk (University of Bergen (NO)) Martin Spousta (Charles University)