Multiplicity dependence of $\pi$, K, and p production in pp collisions at $\sqrt{s}=13$ TeV

Abstract

This paper presents the measurements of ${\pi }^{\pm }$, ${\mathrm{K}}^{\pm }$, $\mathrm{p}$ and $\bar{\mathrm{p}}$ transverse momentum ($p_{\mathrm{T}}$) spectra as a function of charged-particle multiplicity density in proton-proton (pp) collisions at $\sqrt{s}$ = 13 TeV with the ALICE detector at the LHC. Such study allows us to isolate the center-of-mass energy dependence of light-flavour particle production. The measurements reported here cover a $p_{\mathrm{T}}$ range from 0.1 GeV/$c$ to 20 GeV/$c$ and are done in the rapidity interval $|y|<0.5$. The $p_{\mathrm{T}}$-differential particle ratios exhibit an evolution with multiplicity, similar to that observed in pp collisions at $\sqrt{s}$ = 7 TeV, which is qualitatively described by some of the hydrodynamical and pQCD-inspired models discussed in this paper. Furthermore, the $p_{\mathrm{T}}$-integrated hadron-to-pion yield ratios measured in pp collisions at two different center-of-mass energies are consistent when compared at similar multiplicities. This also extends to strange and multistrange hadrons, suggesting that, at LHC energies, particle hadrochemistry scales with particle multiplicity the same way under different collision energies and colliding systems.

27 pages, 7 captioned figures, 3 tables, authors from page 22, published version, figures at http://alice-publications.web.cern.ch/node/6162

References in corpus (9)

• An Introduction to PYTHIA 8.2
• Herwig++ Physics and Manual
• Tuning PYTHIA 8.1: the Monash 2013 Tune
• Observation of long-range near-side angular correlations in proton-lead collisions at the LHC
• Production of charged pions, kaons and (anti-)protons in Pb-Pb and inelastic pp collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Multi-particle azimuthal correlations in p-Pb and Pb-Pb collisions at the CERN Large Hadron Collider
• Study of the inclusive production of charged pions, kaons, and protons in pp collisions at sqrt(s) = 0.9, 2.76, and 7 TeV
• Multiplicity dependence of (multi-)strange hadron production in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Measurement of charged pion, kaon, and proton production in proton-proton collisions at sqrt(s) = 13 TeV

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