Unified description of hadron yield ratios from dynamical core-corona initialization

Abstract

We develop the dynamical core-corona initialization framework as a phenomenological description of the quark gluon plasma (QGP) fluids formation in high-energy nuclear collisions. Using this framework, we investigate the fraction of the fluidized energy to the total energy and strange hadron yield ratios as functions of multiplicity and scrutinize the multiplicity scaling of hadron yield ratios recently reported by ALICE Collaboration. Our results strongly indicate that the QGP fluids are partly formed even at the averaged multiplicity for non-single diffractive p+p events.

Signatures of QGP at RHIC and the LHC

“…13 Two-particle correlation as functions of relative azimuthal angle φ and pseudorapidity η for high multiplicity events in p+p collisions at √ s NN = 7 TeV from the CMS experiment [101] [ 107,113], which needs to be resolved before making conclusive remarks. Strangeness enhancement in small systems is claimed to be explained assuming partial formation of QGP droplet [114]. On the other hand, jet quenching is not observed in the particle yield for small systems [115,116], while a finite elliptic flow v 2 at high p T is observed in high multiplicity events of small systems [117] as in large systems, which could be explained by the path length dependence of parton energy loss.…”

Theory progress at Strange Quark Matter 2021

“…Different theoretical models with very different underlying physics pictures are able to describe the experimental data. This includes PYTHIA with "rope hadronization" (at least for p+p collisions) [38], a (hydrodynamic) core+corona model [39], and thermal (statistical hadronization) model with canonical suppression included [40,41]. It remains an open question as to which picture reflects nature most accurately, in particular for the smaller systems considered.…”

Further developments of a multi-phase transport model for relativistic nuclear collisions

“…On the other hand, PYTHIA8 [228] is quite successful in describing the particle production in pp collisions. It has been extended to treat pA or AA collisions based on the Angantyr framework [229], and PYTHIA8 has been used as the initial condition generator for multiple heavy ion Monte Carlo models [230][231][232]. Therefore, it is worthwhile to have the option to use PYTHIA8 as the initial condition for the AMPT model.…”