Strange hadron collectivity in pPb and PbPb collisions
Abstract The collective behavior of K S 0 $$ {\te...
| Main Authors: | , , , , , , , , , , , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Springer Berlin Heidelberg
2023
|
| Online Access: | https://hdl.handle.net/1721.1/150726 |
| Summary: | Abstract
The collective behavior of
K
S
0
$$ {\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. |
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