Universality in hadronic and nuclear collisions at high energy

2019/12/28 by Paolo Castorina, P. Castorina, Alfredo Iorio +5
Physics and Astronomy · #Cosmology and Gravitation Theories #Elliptic flow #Gluon #Hadron #High-Energy Particle Collisions Research #Large Hadron Collider #Nuclear physics #Observable #Particle physics #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Quark–gluon plasma #Strangeness #Universality (dynamical systems) #hep-ph #nucl-th

paper · pdf · doi:10.1103/physrevc.101.054902

published as Phys. Rev. C 101, 054902 (2020) · 5 pages, 4 figures, submitted to journal

arxiv created 2019/12/28 · openalex publication_date 2020/05/11 · arxiv updated 2020/05/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Recent experimental results in proton-proton and in proton-nucleus collisions at Large Hadron Collider energies show a strong similarity to those observed in nucleus-nucleus collisions, where the formation of a quark-gluon plasma is expected. We discuss the comparison between small colliding systems and nucleus-nucleus collisions, for (a) the strangeness suppression factor \ensuremathγ_s and yields of multi-strange hadrons; (b) the average transverse momentum, p_t, with particular attention to the low p_t region where soft, nonperturbative effects are important; and (c) the elliptic flow scaled by the participant eccentricity. The universal behavior in hadronic and nuclear high energy collisions emerges for all these observables in terms of a specific dynamical variable which corresponds to the entropy density of initial system in the collision and which takes into account the transverse size of the initial configuration and its fluctuations.

Citations

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