Study of $\pi$, K, and p production in high multiplicity pp collisions at $\sqrt{s}$ = 13 TeV with ALICE at the LHC

TL;DR

This paper reports on measurements of pion, kaon, and proton production in high multiplicity proton-proton collisions at 13 TeV, revealing signatures similar to heavy-ion collisions and exploring possible quark-gluon plasma formation.

Contribution

It provides new detailed spectra and particle ratio data in high multiplicity pp collisions at LHC energies, comparing them with p-Pb and Pb-Pb systems.

Findings

Strangeness enhancement observed in high multiplicity pp collisions.

Particle yields increase with multiplicity across systems.

Similar signatures to heavy-ion collisions suggest possible QGP-like effects.

Abstract

High multiplicity proton-proton and proton-lead collisions at LHC energies exhibit similar signatures to those observed in Pb-Pb collisions (i.e. the strangeness enhancement, the ridge behaviours etc.), that were commonly attributed to the formation of the Quark-Gluon Plasma. In this contribution, the measurements of $\pi$, K, and p transverse momentum spectra in the rapidity region |y| < 0.5 for various multiplicity classes in pp, p-Pb and A-A collisions with the ALICE detector at the LHC will be presented. Various results, including the integrated particle yields and particle ratios as a function of charged particle multiplicity for different systems and energies, will be discussed.