Unified description of high-energy nuclear collisions based on dynamical core--corona picture

2022/08/15 by Kanakubo, Yuuka
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2208.07029

Abstract

I establish the dynamical core--corona initialization framework (DCCI2) as a state-of-the-art dynamical framework that is capable of describing small and large colliding systems at the LHC energies. Under the core--corona picture, contributions from both equilibrated (core) and non-equilibrated (corona) components are implemented. I describe the dynamical separation of the system into the core and corona at the initial stage by incorporating the core--corona picture into the novel dynamical initialization framework. With DCCI2, I simulate p+p collisions at √(s)=7, 13 TeV and Pb+Pb collisions at √s_NN=2.76 TeV. Especially, I extract the fractions of core and corona components in final hadron yields in p+p and Pb+Pb collisions as functions of multiplicity, and reveal that the core components become dominant at ⟨ dN_ch/dη⟩_|η|<0.5 ≈ 20. I also find that the corona contribution at very low p_T (below p_T≈1 GeV) is non-negligible even in Pb+Pb collisions and show that such contributions significantly affect p_T-integrated flow coefficients. These results strongly suggest the importance of considering non-equilibrated components to extract transport coefficients of quark-gluon plasma from model-to-data comparisons quantitatively.

Related

• Hadronisation in event generators from small to large systems
• Core - Corona Model analysis of the Low Energy Beam Scan at RHIC (Relativistic Heavy Ion Collider) in Brookhaven (USA)
• Rapidity scan with DCCI at LHC energy
• Charmed hadron chemistry and flow in heavy and light ion collisions at the LHC
• Space-time geometry of small and large collision systems at LHC energies