Eur. Phys. J. C (2015) 75: 15
https://doi.org/10.1140/epjc/s10052-014-3206-7

Regular Article - Theoretical Physics

Particle spectra and HBT radii for simulated central nuclear collisions of C + C, Al + Al, Cu + Cu, Au + Au, and Pb + Pb from – GeV

University of Colorado Boulder, Boulder, USA

^* e-mail: paul.romatschke@colorado.edu

Received: 11 September 2014
Accepted: 27 November 2014
Published online: 14 January 2015

Abstract

We study the temperature profile, pion spectra, and HBT radii in central, symmetric, and boost-invariant nuclear collisions, using a super hybrid model for heavy-ion collisions (SONIC), combining pre-equilibrium flow with viscous hydrodynamics and late-stage hadronic rescatterings. In particular, we simulate Pb + Pb collisions at  TeV, Au + Au, Cu + Cu, Al + Al, and C + C collisions at  GeV, and Au + Au and Cu + Cu collisions at  GeV. We find that SONIC provides a good match to the pion spectra and HBT radii for all collision systems and energies, confirming earlier work that a combination of pre-equilibrium flow, viscosity, and QCD equation of state can resolve the so-called HBT puzzle. For reference, we also show p + p collisions at TeV. We make tabulated data for the 2 + 1 dimensional temperature evolution of all systems publicly available for the use in future jet energy loss or similar studies.