Abstract
The search for the smallest quark-gluon plasma (QGP) droplets in nature has motivated recent small collisions system programs at the BNL Relativistic Heavy Ion Collider (RHIC) and the CERN Large Hadron Collider (LHC). Unambiguous identification of jet quenching due to final-state interactions is key to confirming quark-gluon plasma (QGP) formation in these reactions. We compute the nuclear modification factors and of charged hadrons and heavy flavor mesons in large (Au-Au, Xe-Xe, Pb-Pb) and small (, , O-O) colliding systems, respectively. Our results include the Cronin effect and initial-state parton energy loss in cold nuclear matter. In the final state, hard partons undergo collisional energy loss and branching that was recently derived using soft-collinear-effective-theory with Glauber gluons (). In large colliding systems, medium-modified quantum chromodynamics evolution of the fragmentation functions dominates the nuclear correction. As the system size decreases, we find that cold nuclear matter effects, collisional energy loss, and QGP-induced radiations can become equally important. A systematic scan over the medium size and mass or flavor dependence of provides the opportunity to separate these individual contributions and identify QGP signatures in small systems. Predictions for , , in O-O collisions at and 7 TeV are presented with and without the formation of a QGP and contrasted with the corresponding calculations. Single-hadron measurements at RHIC and the LHC will not only test the O-O predictions for both light and heavy flavor production but also shed light on the possibly very different dynamics of and reactions at similar soft particle production multiplicities.
10 More- Received 22 April 2022
- Revised 17 March 2023
- Accepted 21 April 2023
DOI:https://doi.org/10.1103/PhysRevC.107.064903
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.
Published by the American Physical Society