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

Multiplicity and rapidity dependence of strange hadron production in pp, pPb, and PbPb collisions at the LHC
Multiplicity and rapidity dependence of strange hadron production in pp, pPb, and PbPb collisions at the LHC
Measurements of strange hadron (View the MathML sourceKS0, View the MathML sourceΛ+Λ‾, and View the MathML sourceΞ−+Ξ‾+) transverse momentum spectra in pppp, pPbpPb, 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 pppp collisions at View the MathML sources=7TeV, pPbpPb collisions at View the MathML sourcesNN=5.02TeV, and PbPb collisions at View the MathML sourcesNN=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 pppp and pPbpPb events than for PbPb events. In pPbpPb 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.
0370-2693
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Khachatryan, Vardan
375bcfe5-df1a-41ad-9a90-553e557ef6d6
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

The CMS Collaboration (2017) Multiplicity and rapidity dependence of strange hadron production in pp, pPb, and PbPb collisions at the LHC. Physics Letters B, 768. (doi:10.1016/j.physletb.2017.01.075).

Record type: Article

Abstract

Measurements of strange hadron (View the MathML sourceKS0, View the MathML sourceΛ+Λ‾, and View the MathML sourceΞ−+Ξ‾+) transverse momentum spectra in pppp, pPbpPb, 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 pppp collisions at View the MathML sources=7TeV, pPbpPb collisions at View the MathML sourcesNN=5.02TeV, and PbPb collisions at View the MathML sourcesNN=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 pppp and pPbpPb events than for PbPb events. In pPbpPb 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.

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Accepted/In Press date: 16 January 2017
e-pub ahead of print date: 20 February 2017
Organisations: Physics & Astronomy

Identifiers

Local EPrints ID: 408213
URI: http://eprints.soton.ac.uk/id/eprint/408213
ISSN: 0370-2693
PURE UUID: b9d53ae9-c7bd-4337-9742-6c0349c55714
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 17 May 2017 04:01
Last modified: 07 Oct 2020 01:53

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