Speaker
Description
The measurement of $\varphi$ meson production is a unique tool to explore the characteristics of the quark-gluon plasma (QGP). The $\varphi$ meson has a small interaction cross section and longer lifetime than the QGP, therefore its yields and elliptic flow are good probes of QGP properties. The $\varphi$ meson production might be sensitive to the strangeness enhancement in the QGP 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 $\varphi$ meson production.
The PHENIX experiment has measured transverse momentum spectra, nuclear modification factors $R_{AB}$, and elliptic anisotropy parameter $𝑣_2$ for $\varphi$ mesons in $𝑝$+Al, $𝑝$/$𝑑$/$^3$He/Cu+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV and in U+U collisions at $\sqrt{s_{NN}}$ = 193 GeV at midrapidity (|$\eta$|<0.35). The obtained results exhibit scaling of $𝑣_2$ for $\varphi$ mesons with eccentricity of participant nucleons (collision geometry), whereas the $\varphi$ $R_{AB}$ values depend on the number of binary nucleon-nucleon collisions (system size). The comparison of experimental data on the $\varphi$ meson to various model calculations (AMPT, iEBE-VISHNU and Pythia 8) suggests importance of viscous hydrodynamics and the coalescence mechanism in describing the properties and hadronization of the QGP.
Details
Mr. Iurii Mitrankov, Peter the Great St.Petersburg Polytechnic University (SPbPU), Russia, https://english.spbstu.ru/
| Is this abstract from experiment? | Yes |
|---|---|
| Name of experiment and experimental site | PHENIX |
| Is the speaker for that presentation defined? | Yes |
| Internet talk | Yes |
