The production rates and the transverse momentum distribution of strange hadrons at mid-rapidity mid-rapidity (|y| < 0.5) are measured in proton-proton collisions at √s = 13 TeV as a function of the charged particle multiplicity, using the ALICE detector at the LHC. The production rates of K-S(0), Lambda, Xi, and Omega increase with the multiplicity faster than what is reported for inclusive charged particles. The increase is found to be more pronounced for hadrons with a larger strangeness content. Possible auto-correlations between the charged particles and the strange hadrons are evaluated by measuring the event-activity with charged particle multiplicity estimators covering different pseudorapidity regions. When comparing to lower energy results, the yields of strange hadrons are found to depend only on the mid-rapidity charged particle multiplicity. Several features of the data are reproduced qualitatively by general purpose QCD Monte Carlo models that take into account the effect of densely-packed QCD strings in high multiplicity collisions. However, none of the tested models reproduce the data quantitatively. This work corroborates and extends the ALICE findings on strangeness production in proton-proton collisions at 7 TeV.

S. Acharya, D. Adamová, S. P. Adhya, A. Adler, J. Adolfsson, M. M. Aggarwal, et al. (2020). Multiplicity dependence of (multi-)strange hadron production in proton-proton collisions at √s = 13 TeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 80(2), 1-26 [10.1140/epjc/s10052-020-7673-8].

Multiplicity dependence of (multi-)strange hadron production in proton-proton collisions at √s = 13 TeV

A. Alici;S. Arcelli;F. Bellini;F. Carnesecchi;L. Cifarelli;M. Colocci;G. Scioli;
2020

Abstract

The production rates and the transverse momentum distribution of strange hadrons at mid-rapidity mid-rapidity (|y| < 0.5) are measured in proton-proton collisions at √s = 13 TeV as a function of the charged particle multiplicity, using the ALICE detector at the LHC. The production rates of K-S(0), Lambda, Xi, and Omega increase with the multiplicity faster than what is reported for inclusive charged particles. The increase is found to be more pronounced for hadrons with a larger strangeness content. Possible auto-correlations between the charged particles and the strange hadrons are evaluated by measuring the event-activity with charged particle multiplicity estimators covering different pseudorapidity regions. When comparing to lower energy results, the yields of strange hadrons are found to depend only on the mid-rapidity charged particle multiplicity. Several features of the data are reproduced qualitatively by general purpose QCD Monte Carlo models that take into account the effect of densely-packed QCD strings in high multiplicity collisions. However, none of the tested models reproduce the data quantitatively. This work corroborates and extends the ALICE findings on strangeness production in proton-proton collisions at 7 TeV.
2020
S. Acharya, D. Adamová, S. P. Adhya, A. Adler, J. Adolfsson, M. M. Aggarwal, et al. (2020). Multiplicity dependence of (multi-)strange hadron production in proton-proton collisions at √s = 13 TeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 80(2), 1-26 [10.1140/epjc/s10052-020-7673-8].
S. Acharya; D. Adamová; S. P. Adhya; A. Adler; J. Adolfsson; M. M. Aggarwal; G. Aglieri Rinella; M. Agnello; N. Agrawal; Z. Ahammed; S. Ahmad; S. U. A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/775639
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