Investigating jet induced identified hadron productions from the relative transverse activity classifier in pp collision at LHC

TL;DR

This study uses the AMPT model to analyze jet-associated identified hadron production in pp collisions at 13 TeV, revealing how final state interactions influence baryon/meson ratios and jet modifications across event activity levels.

Contribution

It introduces a novel analysis of in-jet hadron production and baryon/meson ratio dependence on event activity, providing new signatures for jet-medium interactions in small systems.

Findings

AMPT model describes experimental data well across regions and activity classes.

In-jet baryon/meson ratios depend on relative transverse activity, showing a crossing pattern.

Final state interactions significantly modify jet-related hadron production.

Abstract

In this work, we systematically investigate the jet associated identified hadron productions of pions, kaons, and protons based on the event topological separation method in proton proton (pp) collisions at $\sqrt{s}=13$ TeV employing the AMPT model with PYTHIA8 initial conditions. Enabling relative transverse event activity classifier $R_T$, we analyze the transverse momentum ($p_T$) spectra and particle ratios in the jet aligned toward region and the underlying event (UE) contributions sensitive transverse region varying with $R_T$. The results indicate that the AMPT model, incorporating both partonic and hadronic final-state interactions, provides a satisfactory description to the experimental data of the $p_T$ differential yields, particle ratios and average transverse momentum of identified particles in both the toward and transverse regions across different event activity classes. By subtracting the UE contribution from the toward region using the transverse region hadron yield, we introduce the in-jet hadron productions to analyze the modifications to jet itself. We find that the in-jet baryon to meson ratios reveal a sensitive dependence on $R_T$ driven by final state interactions, leading to a unique crossing pattern at intermediate $p_T$. This behavior can be regarded as a novel signature for probing jet medium interactions and energy loss effects in small collision systems.