XXVIII International Workshop on Deep-Inelastic Scattering and Related Subjects

J/ψ production in jets in p+p collisions at s = 500 GeV by STAR

13 Apr 2021, 09:43

18m

Virtual (Stony Brook, NY)

Contributed Talk QCD with Heavy Flavors and Hadronic Final States QCD with Heavy Flavors and Hadronic Final States

Speaker

Dr Qian Yang (Shandong University)

Description

The suppression of $J/\psi$ production caused by the color-screening effect in heavy-ion collisions is considered as an evidence of the creation of quark-gluon plasma. To interpret the observed suppression in heavy-ion collisions, a good understanding of its production mechanism in p+p collisions is needed. However, the production of $J/\psi$ in hadronic collisions remains not fully understood and requires further studies. Recently, $J/\psi$ production in jets was proposed as a useful observable to help explore the $J/\psi$ production mechanism, and to differentiate various $J/\psi$ production models.

In this talk, we will present the measurement of the fraction of charged jet transverse momentum ($p_T$) carried by the $J/\psi$ meson, z($J/\psi$) $\equiv$ $p_T(J/\psi )$/$p_T(jet)$, at mid-pseudorapidity ($|\eta |<1$) with kinematic cuts of $p_T(J/\psi )>$5 GeV/c and $p_T(jet)>$10 GeV/c in p+p collisions at $\sqrt{s}$ = 500 GeV by the STAR experiment. The comparison to model calculations and similar measurements carried out at the LHC will be presented, and its physics implications will be discussed.

Presentation materials

DIS_final.pdf

Youtube Link