English

Multipartonic cascades in expanding media

High Energy Physics - Phenomenology 2022-12-07 v1

Abstract

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 RAAR_{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 RAAR_{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 RAAR_{AA} as well as jet v2v_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.

Keywords

Cite

@article{arxiv.2212.03083,
  title  = {Multipartonic cascades in expanding media},
  author = {Souvik Priyam Adhya and Carlos A. Salgado and Martin Spousta and Konrad Tywoniuk},
  journal= {arXiv preprint arXiv:2212.03083},
  year   = {2022}
}

Comments

7 pages, 2 figs, Talk at Quark Matter 2022, Krakow; matches accepted version in Acta Physica Polonica B

R2 v1 2026-06-28T07:23:46.261Z