Strange hadron collectivity in pPb and PbPb collisions

CMS Collaboration

doi:10.1007/JHEP05(2023)007

Strange hadron collectivity in pPb and PbPb collisions

CMS Collaboration

Research output: Contribution to journal › Article › peer-review

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Abstract

The collective behavior of K$^0_\mathrm{S}$ and $\Lambda/\bar{\Lambda}$ 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 $\sqrt{s_\mathrm{NN}}$ = 8.16 TeV and lead-lead (PbPb) collisions at $\sqrt{s_\mathrm{NN}}$ = 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.

Original language	English
Article number	7
Number of pages	43
Journal	JHEP
Volume	2023
Issue number	5
DOIs	https://doi.org/10.1007/JHEP05(2023)007
Publication status	Published - 2 May 2023

Bibliographical 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)

Keywords

nucl-ex
hep-ex

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JHEP05(2023)007Final published version, 1.24 MBLicence: CC BY

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@article{1ed19a1e5886473c855c60526dac6893,

title = "Strange hadron collectivity in pPb and PbPb collisions",

abstract = " The collective behavior of K$^0_\mathrm{S}$ and $\Lambda/\bar{\Lambda}$ 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 $\sqrt{s_\mathrm{NN}}$ = 8.16 TeV and lead-lead (PbPb) collisions at $\sqrt{s_\mathrm{NN}}$ = 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. ",

keywords = "nucl-ex, hep-ex",

author = "{CMS Collaboration} and Freya Blekman and Bols, {Emil S{\o}rensen} and Jorgen D'Hondt and Martin Delcourt and {El Faham}, Hesham and Steven Lowette and Seth Moortgat and Alexander Morton and Denise M{\"u}ller and Sahasransu, {Abanti Ranadhir} and Stefaan Tavernier and {Van Doninck}, Walter and {Van Mulders}, Petra and Nicolas Stylianou",

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)",

year = "2023",

month = may,

day = "2",

doi = "10.1007/JHEP05(2023)007",

language = "English",

volume = "2023",

journal = "JHEP",

issn = "1029-8479",

publisher = "Springer Verlag",

number = "5",

}

TY - JOUR

T1 - Strange hadron collectivity in pPb and PbPb collisions

AU - CMS Collaboration

AU - Blekman, Freya

AU - Bols, Emil Sørensen

AU - D'Hondt, Jorgen

AU - Delcourt, Martin

AU - El Faham, Hesham

AU - Lowette, Steven

AU - Moortgat, Seth

AU - Morton, Alexander

AU - Müller, Denise

AU - Sahasransu, Abanti Ranadhir

AU - Tavernier, Stefaan

AU - Van Doninck, Walter

AU - Van Mulders, Petra

AU - Stylianou, Nicolas

N1 - 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)

PY - 2023/5/2

Y1 - 2023/5/2

N2 - The collective behavior of K$^0_\mathrm{S}$ and $\Lambda/\bar{\Lambda}$ 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 $\sqrt{s_\mathrm{NN}}$ = 8.16 TeV and lead-lead (PbPb) collisions at $\sqrt{s_\mathrm{NN}}$ = 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.

AB - The collective behavior of K$^0_\mathrm{S}$ and $\Lambda/\bar{\Lambda}$ 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 $\sqrt{s_\mathrm{NN}}$ = 8.16 TeV and lead-lead (PbPb) collisions at $\sqrt{s_\mathrm{NN}}$ = 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.

KW - nucl-ex

KW - hep-ex

UR - http://www.scopus.com/inward/record.url?scp=85166952415&partnerID=8YFLogxK

U2 - 10.1007/JHEP05(2023)007

DO - 10.1007/JHEP05(2023)007

M3 - Article

SN - 1029-8479

VL - 2023

JO - JHEP

JF - JHEP

IS - 5

M1 - 7

ER -

Strange hadron collectivity in pPb and PbPb collisions

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