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Multiplicity and rapidity dependence of strange hadron production in pp, pPb, and PbPb collisions at the LHC
Journal article   Open access   Peer reviewed

Multiplicity and rapidity dependence of strange hadron production in pp, pPb, and PbPb collisions at the LHC

CMS Collaboration, Maria Florencia Canelli, Benjamin Kilminster, Thea K Aarrestad, Lea Caminada, Annapaoloa De Cosa, Riccardo Del Burgo, Silvio Donato, Camilla Galloni, Andreas Hinzmann, …
Physics letters. B, Vol.768, pp.103-129
2017
DOI: 10.1016/j.physletb.2017.01.075
url
https://doi.org/10.1016/j.physletb.2017.01.075View
Published (Version of record) Open Access

Abstract

Measurements of strange hadron ($K_S^0$, $Λ+\overline{Λ}$, and $_{\Xi^- + \overline{\Xi}^+}$) transverse momentum spectra in $pp$, $pPb$, and PbPb collisions are presented over a wide range of rapidity and event charged-particle multiplicity. The data were collected with the CMS detector at the CERN LHC in $pp$ collisions at $\sqrt{s}=7$ TeV, $pPb$ collisions at $\sqrt{s_{NN}}$=5.02TeV, and PbPb collisions at $\sqrt{s_{NN}}$=2.76TeV. The average transverse kinetic energy is found to increase with multiplicity, at a faster rate for heavier strange particle species in all systems. At similar multiplicities, the difference in average transverse kinetic energy between different particle species is observed to be larger for $pp$ and $pPb$ events than for PbPb events. In $pPb$ collisions, the average transverse kinetic energy is found to be slightly larger in the Pb-going direction than in the p-going direction for events with large multiplicity. The spectra are compared to models motivated by hydrodynamics.
Physics Physics Institute

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