Speaker
Qian Yang
(Shandong University)
Description
The production of heavy quarkonia has been extensively used to probe the Quark-Gluon Plasma (QGP) created in heavy ion collisions. The suppression of 𝐽/$\psi$ in a deconfined medium due to Debye color screening of the charm quark potential has been proposed as a signature of the QGP formation. Interpretation of 𝐽/$\psi$ suppression requires good understandings of its production mechanism in elementary collisions. Despite decades of efforts, the 𝐽/$\psi$ production mechanism in p+p collisions is still not fully understood. 𝐽/$\psi$ measurements in p+p collisions can provide additional insights into its production mechanism.
We present the measurements of the production cross-sections of the J/$\psi$ meson as a function of transverse momentum, as well as its yield dependence on charged-particle multiplicity in proton-proton collisions at center-of-mass energies of 510 and 500 GeV using data recorded by the STAR detector at the Relativistic Heavy Ion Collider (RHIC).
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Primary author
Qian Yang
(Shandong University)
