Strange hadron collectivity in pPb and PbPb collisions
Name
13130_2023_Article_20758.pdf
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Author(s)
Tumasyan, A.
Adam, W.
Andrejkovic, J. W.
Bergauer, T.
Chatterjee, S.
Dragicevic, M.
Escalante Del Valle, A.
Frühwirth, R.
Jeitler, M.
Krammer, N.
Date Issued
May 2, 2023
Publisher
Springer Berlin Heidelberg
Citation
Journal of High Energy Physics. 2023 May 02;2023(5):7
Version
Final published version
Abstract
Abstract
The collective behavior of
K
S
0
$$ {\textrm{K}}_{\textrm{S}}^0 $$
and
Λ
/
Λ
¯
$$ \Lambda /\overline{\Lambda} $$
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
$$ \sqrt{s_{\textrm{NN}}} $$
= 8.16 TeV and lead-lead (PbPb) collisions at
s
NN
$$ \sqrt{s_{\textrm{NN}}} $$
= 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 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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1007/JHEP05(2023)007
