Exploring the importance of quark recombination in high multiplicity small system collisions

Jun 21, 2023, 3:20 PM
20m
Aud. 3 (H.C. Ørsted)

Aud. 3

H.C. Ørsted

Oral Collective dynamics from small to large systems Parallel Session 6

Speakers

Huichao Song Yuanyuan Wang (Peking University)

Description

Particle production and collective flow of identified hadrons over the $p_{\rm T}$ range from 0 to 6 GeV in high multiplicity events of proton-proton and proton-lead collisions at the Large Hadron Collider (LHC) are investigated by Hydro-Coal-Frag model, which includes hydrodynamic models at low transverse momentum, quark recombination model at intermediate transverse momentum, and string fragmentation model at high transverse momentum. The Hydro-Coal-Frag model gives a good description of the transverse momentum ($p_{\rm T}$)-spectra and differential elliptic flow, $v_2(p_{\rm T})$, of pions kaons, and protons over the $p_{\rm T}$ range of 0 to 6 GeV. We also well reproduce the experimentally observed approximate NCQ scaling of hadrons $v_2$ at intermediate $p_{\rm T}$. We demonstrate that quark coalescence plays a crucial role in this process. Our results strongy hint the possible formation of quark-gluon plasma in high multiplicity p--p collision and p-Pb collisions at the LHC.

What kind of work does this abstract pertain to? Theoretical
Which experiment is this abstract related to? ALICE

Authors

Huichao Song Wenbin Zhao (Wayne State University) Yuanyuan Wang (Peking University)

Presentation materials