Strange hadron collectivity in pPb and PbPb collisions - INSPIRE

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Strange hadron collectivity in pPb and PbPb collisions

CMS

Collaboration

Apr 29, 2022

21 pages

Published in:

JHEP 05 (2023) 007

Published: May 2, 2023

e-Print:

2205.00080 [nucl-ex]

DOI:

10.1007/JHEP05(2023)007

Report number:

CMS-HIN-19-004,
CERN-EP-2022-036

Experiments:

CERN-LHC-CMS

View in:

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Abstract: (Springer)

The collective behavior of

{\textrm{K}}_{\textrm{S}}^0

and

\Lambda /\overline{\Lambda}

strange hadrons is studied by measuring the elliptic azimuthal anisotropy (v

_{2}

) using the scalar-product and multiparticle correlation methods. Proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy

\sqrt{s_{\textrm{NN}}}

= 8.16 TeV and lead-lead (PbPb) collisions at

\sqrt{s_{\textrm{NN}}}

= 5.02 TeV collected by the CMS experiment at the LHC are investigated. Nonflow effects in the pPb collisions are studied by using a subevent cumulant analysis and by excluding events where a jet with transverse momentum greater than 20 GeV is present. The strange hadron v

_{2}

values extracted in pPb collisions via the four- and six-particle correlation method are found to be nearly identical, suggesting the collective behavior. Comparisons of the pPb and PbPb results for both strange hadrons and charged particles illustrate how event-by-event flow fluctuations depend on the system size.[graphic not available: see fulltext]

Note:

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-19-004 (CMS Public Pages)

Collective Flow
Hadron-Hadron Scattering
angular distribution: anisotropy
p nucleus: scattering
heavy ion: scattering
flow: fluctuation
hadron
collective
correlation
charged particle

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