The collective behavior of K-S(0) and Lambda/(Lambda) over bar 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 root s(NN) = 8.16 TeV and lead-lead (PbPb) collisions at root 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 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.

Strange hadron collectivity in pPb and PbPb collisions

Bortignon, P.;Bragagnolo, A.;Carlin, R.;Gasparini, U.;Margoni, M.;Pazzini, J.;Ronchese, P.;Rossin, R.;Simonetto, F.;Strong, G.;Tosi, M.;Zanetti, M.;Zotto, P.;
2023

Abstract

The collective behavior of K-S(0) and Lambda/(Lambda) over bar 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 root s(NN) = 8.16 TeV and lead-lead (PbPb) collisions at root 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 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.
2023
File in questo prodotto:
File Dimensione Formato  
Art_JHEP_2023_0005_0007_2023.pdf

accesso aperto

Tipologia: Published (Publisher's Version of Record)
Licenza: Creative commons
Dimensione 1.27 MB
Formato Adobe PDF
1.27 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3506819
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 6
  • ???jsp.display-item.citation.isi??? 8
  • OpenAlex 6
social impact