Medium effects for hadron-tagged jets in proton-proton collisions

TL;DR

This paper investigates medium modifications in hadron-tagged jets in proton-proton collisions using a theoretical approach, fitting parameters to LHC data and comparing predictions with recent ALICE results.

Contribution

It introduces a parameterization of the running coupling in the light-cone path integral approach to model medium effects without free parameters, fitting to LHC data.

Findings

Theoretical predictions align with ALICE preliminary data.

The model successfully describes multiplicity dependence of $I_{pp}$.

Parameterization of $eta_s$ captures medium effects in $pp$ collisions.

Abstract

We study the medium modification factor $I_{pp}$ within the light-cone path integral approach to induced gluon emission. We use parametrization of the running coupling $\alpha_s(Q,T)$ which has a plateau around $Q\sim \kappa T$. We calculate $I_{pp}$ with no free parameters using $\kappa$ fitted to the LHC data on the nuclear modification factor $R_{AA}$. We find that the theoretical multiplicity dependence of the ratio $I_{pp}/\langle I_{pp}\rangle$ for $5.02$ TeV $pp$ collisions agrees reasonably with the recent preliminary data from ALICE [1].