Parton cascades at DLA: the role of the evolution variable

Abstract

The theoretical treatment of jet quenching lacks a full description of the interplay between vacuum-like emissions, usually formulated in momentum space, and medium induced ones that demand an interface with a space-time picture of the expanding medium and thus must be formulated in position space. In this work we build a toy Monte-Carlo parton shower ordered in formation time, virtual mass, and opening angle, which are equivalent at leading logarithmic accuracy. Aiming to explore a link with jet substructure, we compute the Lund plane distributions for the different ordering prescriptions. Further, we investigate the sensitivity of ordering prescriptions to medium effects by counting the number of events eliminated by a decoherence condition.

Comments: 4 pages, 3 figures. Proceedings for a parallel presentation at Quark Matter 2023 in Houston, Texas, United States of America from 3-9 September 2023. arXiv admin note: text overlap with arXiv:2307.08410