Quark coalescence from RHIC to LHC

31st Winter Workshop on Nuclear Dynamics

Minissale, Vincenzo^1,2 ; Scardina, Francesco^1,2 ; Greco, Vincenzo^1,2

Department of Physics and Astronomy, University of Catania, Via S. Sofia 62, Catania

I-95123, Italy^1

INFN-LNS, Laboratori Nazionali Del Sud, Via S. Sofia 64, Catania

I-95123, Italy^2

关键词: Fragmentation models;    Hadronization;    Quark coalescence;    Quark-gluon plasma;    Transverse momenta;    Ultrarelativistic heavy ion collision;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/636/1/012014/pdf
DOI  :  10.1088/1742-6596/636/1/012014

来源: IOP

【 摘 要 】

We discuss the application of a phase-space coalescence plus fragmentation model for the hadronization of the quark-gluon plasma (QGP) created in ultra-relativistic heavy-ion collisions. Recombination of minijet partons with the partons from the QGP is also included and plays a role at pT∼ 2 - 4 GeV where the baryon to meson anomaly is observed experimentally. We show our prediction for light and strange hadrons transverse momentum spectra (π, p, k, Λ) and baryon to meson ratios (p/π, Λ/k) in a wide range of pT, both for RHIC and LHC energies. The baryon to meson ratio at LHC presents similar features of that at RHIC, but with a shift in the peak of about 0.5 GeV, and this is well predicted by our model.