Effective-energy budget in multiparticle production in nuclear collisions

The European Physical Journal C

Alexander S. Sakharov¹  Edward K. G. Sarkisyan²  Aditya Nath Mishra³  Raghunath Sahoo³ 

[1] Department of Physics, CERN, 1211, Geneva 23, Switzerland;Department of Physics, Kyungpook National University, 702-701, Daegu, Korea;Department of Physics, CERN, 1211, Geneva 23, Switzerland;Department of Physics, The University of Texas at Arlington, 76019, Arlington, TX, USA;Discipline of Physics, School of Basic Sciences, Indian Institute of Technology Indore, 452017, Indore, India;

关键词: Constituent Quark;    Central Collision;    Nuclear Collision;    Centrality Interval;    Multiparticle Production;   

DOI  :  10.1140/epjc/s10052-014-3147-1

来源: Springer

【 摘 要 】

The dependencies of charged particle pseudorapidity density and transverse energy pseudorapidity density at midrapidity on the collision energy and on the number of nucleon participants, or centrality, measured in nucleus–nucleus collisions are studied in the energy range spanning a few GeV to a few TeV per nucleon. The approach in which the multiparticle production is driven by the dissipating effective energy of participants is introduced. This approach is based on the earlier proposed consideration, combining the constituent quark picture together with Landau relativistic hydrodynamics shown to interrelate the measurements from different types of collisions. Within this picture, the dependence on the number of participants in heavy-ion collisions are found to be well described in terms of the effective energy defined as a centrality-dependent fraction of the collision energy. For both variables under study, the effective-energy approach reveals a similarity in the energy dependence obtained for the most central collisions and centrality data in the entire available energy range. Predictions are made for the investigated dependencies for the forthcoming higher-energy measurements in heavy-ion collisions at the LHC.

【 授权许可】

CC BY