Eur. Phys. J. C (2016) 76: 419
https://doi.org/10.1140/epjc/s10052-016-4270-y

Regular Article - Theoretical Physics

Predictions for squeezed back-to-back correlations of and in high-energy heavy-ion collisions by event-by-event hydrodynamics

¹ School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, 116024, Liaoning, China
² Department of Physics, Harbin Institute of Technology, Harbin, 150006, Heilongjiang, China

^* e-mail: wnzhang@dlut.edu.cn

Received: 12 October 2015
Accepted: 15 July 2016
Published online: 27 July 2016

Abstract

We calculate the squeezed back-to-back correlation (BBC) functions of and for heavy-ion collisions at RHIC and LHC energies, using ()-dimensional hydrodynamics with fluctuating initial conditions. The BBC functions averaged over event-by-event calculations for many events for the hydrodynamic sources are smoothed as a function of the particle momentum. For heavy-ion collisions of Au  Au at  GeV, the BBC functions are larger than those for collisions of Pb  Pb at  TeV. The BBC of may possibly be observed in peripheral collisions at the RHIC and LHC energies. It is large for the smaller sources of Cu  Cu collisions at  GeV.