Strange hadron collectivity in pPb and PbPb collisions
Fecha
2023Materia
Abstract
The collective behavior of K 0 S and Λ/Λ strange hadrons is studied by measuring the elliptic azimuthal anisotropy (v2 ) using the scalar-product and multiparticle correlation methods. Proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy √s NN = 8.16 TeV and lead-lead (PbPb) collisions at √s 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 ...
The collective behavior of K 0 S and Λ/Λ strange hadrons is studied by measuring the elliptic azimuthal anisotropy (v2 ) using the scalar-product and multiparticle correlation methods. Proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy √s NN = 8.16 TeV and lead-lead (PbPb) collisions at √s 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 v2 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. ...
En
The journal of high energy physics. Trieste. No. 5 (May 2023), 007, 42 p.
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