Searching for enhancement in coalescence of in-jet (anti-)deuterons in proton-proton collisions

Abstract

Recent measurements from ALICE report that "in-jet"nucleons carry a higher probability of forming a deuteron via coalescence than the nucleons from the underlying event (UE). This study makes use of an event shape classifier to separate the "in-jet"deuterons and the deuterons in the UE produced in high multiplicity proton-proton collisions at s=13 TeV. Event shape variables such as transverse spherocity allow the categorization of hard and soft components of an event, which can be divided into two respective classes

"jetty"and "isotropic". The "jetty"deuterons minus the contribution of the deuterons from the "isotropic"event are taken as "in-jet"deuterons, and the coalescence mechanism is tested. The coalescence is performed with a Wigner function formalism, augmented as an afterburner to pythia8. The possible enhancement of the coalescence probability of "in-jet"deuterons is investigated by calculating the coalescence parameter (B2) in different spherocity classes in high-multiplicity pp collisions. © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.