Strange hadron collectivity in pPb and PbPb collisions
The collective behavior of K$$_{S}^{0}$$ and $$Λ/ \overline{Λ}$$ strange hadrons is studied by measuring the elliptic azimuthal anisotropy ($$\mathcal{v}$$2) using the scalar-product and multiparticle correlation methods. Proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy $$\sqrt{s_{NN}}$$ = 8.16 TeV and lead-lead (PbPb) collisions at $$\sqrt{s_{NN}}$$ = 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 $$\mathcal{v}$$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.
- Research Organization:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- CMS Collaboration
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1984961
- Report Number(s):
- CMS-HIN-19-004; CERN-EP-2022-036; FERMILAB-PUB-23-303-CMS; arXiv:2205.00080; oai:inspirehep.net:2075415; TRN: US2402626
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2023, Issue 5; ISSN 1029-8479
- Publisher:
- Springer NatureCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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