Study of strange non-strange hadron ratios in pp and p-Pb collisions at LHC energies

TL;DR

This paper investigates how strange and non-strange hadron yield ratios vary with event multiplicity in pp and p-Pb collisions at LHC energies, using models to compare with experimental data and understand the underlying mechanisms.

Contribution

It compares the predictions of EPOS3 and AMPT models with experimental data to explain the enhancement of strange hadron ratios at high multiplicity.

Findings

String melting versions of models show yield ratio enhancements.

Models reproduce the trend of increasing yield ratios with multiplicity.

Experimental data confirms similar enhancement patterns across different hadron ratios.

Abstract

It has been observed that the yields of strange and multi-strange hadrons relative to pion increase significantly with the event charged-particle multiplicity. We notice from experimental data that yield ratios between non-strange hadrons, like p/$\pi$ or hadrons of same strange content, like $\Lambda$/K$_s^0$, show similar enhancement. We have studied this behavior within the ambit of a parton model (EPOS3) and A Multi-Phase Transport (AMPT) model in pp and p-Pb collisions at LHC energies. We investigate model predictions of yields and yield ratios of different identified hadron productions as a function of charged-particle multiplicity and compare them with published ALICE results. The string melting versions of AMPT and EPOS are found to establish enhancements in the particle yield ratios.