Speaker
Description
The production of quarkonia in high-energy heavy-ion collisions has been studied extensively to understand their production mechanisms and properties of Quark-Gluon Plasma (QGP). The recent PHENIX study shows the increasing $J/\psi$ yields versus multiplicity in $p+p$ collisions which is similar to results in different $J/\psi$ acceptance and collision energy. These results imply that the multi-parton interactions contribute to the $J/\psi$ production at RHIC energy. PHENIX also performed a detailed study with multiplicity at various acceptance. $J/\psi$ and $\psi(2S)$ have the same quark-antiquark composition, but $\psi(2S)$ has a lower binding energy than $J/\psi$. Therefore, $J/\psi$ and $\psi(2S)$ are expected to be modified differently due to the final-state effect like interaction with nuclear mediums or co-moving particles. Such different modifications can be applied to $A+A$ collisions, even in small systems like $p+A$ collisions; thus, understanding the modification mechanism is crucial for the precise understanding of the whole production mechanism. It will be very interesting to extend the study of the relative production of two states in various multiplicity of $p+p$ collisions. In this talk, we will present the status of multiplicity-dependent production of charmonia in $p+p$ collisions with PHENIX, along with comparisons with results from other experiments and PYTHIA8 using various options.
Details
Jongho Oh, Mr. , Pusan National University, South Korea, www.pusan.ac.kr/eng/Main.do
| Is this abstract from experiment? | Yes |
|---|---|
| Name of experiment and experimental site | PHENIX |
| Is the speaker for that presentation defined? | Yes |
| Internet talk | Yes |