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Multiplicity dependence of identified particle production in proton-proton collisions with ALICE

Vislavicius, Vytautas LU and , (2017) In Nuclear Physics A 967. p.337-340
Abstract

The study of identified particle production as a function of transverse momentum (pT) and event multiplicity in proton-proton (pp) collisions at different center-of-mass energies (s) is a key tool for understanding similarities and differences between small and large collisions systems. We report on the production of π±, K±, KS 0, p(p‾), Λ(Λ‾), Ξ± and Ω± measured in pp collisions in a wide range of center-of-mass energies with ALICE [1]. The multiplicity dependence of identified particle yields is presented for s=7 and 13 TeV and discussed in the context of the results obtained in protonlead (p-Pb) and lead-lead (Pb-Pb) collisions, unveiling remarkable and... (More)

The study of identified particle production as a function of transverse momentum (pT) and event multiplicity in proton-proton (pp) collisions at different center-of-mass energies (s) is a key tool for understanding similarities and differences between small and large collisions systems. We report on the production of π±, K±, KS 0, p(p‾), Λ(Λ‾), Ξ± and Ω± measured in pp collisions in a wide range of center-of-mass energies with ALICE [1]. The multiplicity dependence of identified particle yields is presented for s=7 and 13 TeV and discussed in the context of the results obtained in protonlead (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.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
collectivity, Multiplicity dependence, small systems
in
Nuclear Physics A
volume
967
pages
4 pages
publisher
Elsevier
external identifiers
  • scopus:85031902677
  • wos:000413384100052
ISSN
0375-9474
DOI
10.1016/j.nuclphysa.2017.05.088
language
English
LU publication?
yes
id
d4db3d55-0ed9-4c78-959a-328f7666409c
date added to LUP
2017-10-30 13:23:27
date last changed
2018-01-16 13:24:50
@article{d4db3d55-0ed9-4c78-959a-328f7666409c,
  abstract     = {<p>The study of identified particle production as a function of transverse momentum (p<sub>T</sub>) and event multiplicity in proton-proton (pp) collisions at different center-of-mass energies (s) is a key tool for understanding similarities and differences between small and large collisions systems. We report on the production of π<sup>±</sup>, K<sup>±</sup>, K<sub>S</sub> <sup>0</sup>, p(p‾), Λ(Λ‾), Ξ<sup>±</sup> and Ω<sup>±</sup> measured in pp collisions in a wide range of center-of-mass energies with ALICE [1]. The multiplicity dependence of identified particle yields is presented for s=7 and 13 TeV and discussed in the context of the results obtained in protonlead (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.</p>},
  author       = {Vislavicius, Vytautas and , },
  issn         = {0375-9474},
  keyword      = {collectivity,Multiplicity dependence,small systems},
  language     = {eng},
  month        = {11},
  pages        = {337--340},
  publisher    = {Elsevier},
  series       = {Nuclear Physics A},
  title        = {Multiplicity dependence of identified particle production in proton-proton collisions with ALICE},
  url          = {http://dx.doi.org/10.1016/j.nuclphysa.2017.05.088},
  volume       = {967},
  year         = {2017},
}