Multiplicity dependence of identified particle production in pp collisions with ALICE

Abstract

The study of identified particle production as a function of transverse momentum ($p_{\text{T}}$) and event multiplicity in proton-proton (pp) collisions at different center-of-mass energies ($\sqrt{s}$) is a key tool for understanding similarities and differences between small and large collisions systems. We report on the production of ${\pi }^{\pm }$, $K^{\pm }$, $K_S^0$, $p(\bar{p})$, $\Lambda (\bar{\Lambda })$, ${\Xi }^{\pm }$ and ${\Omega }^{\pm }$ measured in pp collisions in a wide range of center-of-mass energies with ALICE. The multiplicity dependence of identified particle yields is presented for $\sqrt{s}=\text{7}$ and $13$ TeV and discussed in the context of the results obtained in proton-lead (p-Pb) and lead-lead (Pb-Pb) collisions, unveiling remarkable and intriguing similarities. The production rates of strange hadrons are observed to increase more than those of non-strange particles, showing an enhancement pattern with multiplicity which does not depend on the collision energy. Even if the multiplicity dependence of spectral shapes can be qualitatively described by commonly-used Monte Carlo (MC) event generators, the evolution of integrated yield ratios is poorly described by these models.

4 pages, 3 figures

References in corpus (3)

• Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions
• Coalescence Models For Hadron Formation From Quark Gluon Plasma
• Multiplicity dependence of light flavour hadron production at LHC energies in the strangeness canonical suppression picture

Cited by in corpus (4)

• Effect of Rope Hadronisation on Strangeness Enhancement in p$-$p collisions at LHC energies
• Constituent quark number scaling from strange hadron spectra in $pp$ collisions at $\sqrt{s}=$ 13 TeV
• Event-shape- and multiplicity-dependent identified particle production in pp collisions at 13 TeV with ALICE at the LHC
• Multiplicity dependent $p_T$ distributions of identified particles in pp collisions at 7 TeV within HIJING/$B\bar{B}$ v2.0 model