DIS2023: XXX International Workshop on Deep-Inelastic Scattering and Related Subjects

Study of $J/\psi$ production with jet activity in $p$+$p$ collisions at $\sqrt{s}$ = 200 GeV with the STAR experiment

28 Mar 2023, 15:20

20m

104AB (MSU Kellogg Center)

Parallel talk WG4: QCD with Heavy Flavours and Hadronic Final States WG4

Speaker

Prof. Yi Yang (National Cheng Kung University (TW))

Description

The production mechanism of quarkonia in $p$+$p$ collisions involves both the perturbative and non-perturbative QCD processes and is a topic of active investigation. Quarkonium production from Color Singlet Model and Color Octet Mechanism is expected to result in different jet activities, i.e., the number of jets associated with quarkonium creation, due to different numbers of emitted hard partons. Therefore, the study of $J/\psi$ production with respect to jet activity could potentially be used to differentiate between the different production mechanisms.
In this talk, we will present the first measurement of the $J/\psi$ production cross section as a function of jet activity in $p$+$p$ collisions at $\sqrt{s}$ = 200 GeV from the STAR experiment. These results are compared to the PYTHIA calculations, and physics implications will be discussed.

Presentation materials

20230328_YiYang_DIS_final.pdf