Abstract
Abstract
The measurement of ϕ meson production is a unique tool to explore the characteristics of the quark-gluon plasma. The ϕ meson has a small interaction cross section therefore its yields and elliptic flow are good probes of the quark-gluon plasma properties. The ϕ meson production can be sensitive to the strangeness enhancement effect and can provide information about the flavor dependence of energy loss and elliptic flow. Measurements in different nucleus-nucleus collisions allow us to perform a systematic investigation of the nuclear matter effects, system size and geometry influence on ϕ meson production. The PHENIX experiment has measured transverse momentum spectra, nuclear modification factors R
AB
, and elliptic anisotropy parameter v
2 for ϕ mesons in p+Al, p/d/3 He/Cu+Au collisions at
s
NN
=
200
GeV
and in U + U collisions at
s
NN
=
193
GeV
at midrapidity (∣η∣ < 0.35). The obtained results exhibit scaling of v
2 for ϕ mesons with eccentricity of participant nucleons (collision geometry), whereas the ϕ R
AB
values depend on the number of binary nucleon-nucleon collisions (system size). The comparison of experimental data on the ϕ meson to various model calculations (AMPT, iEBE-VISHNU and PYTHIA/Angantyr) suggests the importance of viscous hydrodynamics and the coalescence mechanism in describing the properties and hadronization of the QGP.
Funder
Ministry of Education and Science of the Russian Federation in the phi meson production in 3He+Au collisions part of the analysis
Subject
Condensed Matter Physics,Mathematical Physics,Atomic and Molecular Physics, and Optics
Cited by
1 articles.
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