Path-length dependence of parton energy loss across collision systems: a Bayesian analysis of charged-particle RAA, consistent with a universal exponent from O+O to Pb+Pb

Fouad A. Majeed, Hussein Ali Hussein Al Naffakh, Sarah M. Obaid +1

How parton energy loss in the quark-gluon plasma (QGP) scales with the in-medium path length $L$ encodes the mechanism: collisional ($\hat{I}”E\propto L$), radiative ($\hat{I}”E\propto L^2$)…