Locally anisotropic momentum distributions of hadrons at freeze-out in relativistic heavy-ion collisions

Abstract

A spheroidal anisotropic local momentum distribution is implemented in the statistical model of hadron production. We show that this form leads to exactly the same ratios of hadronic abundances as the equilibrium distributions, if the temperature is identified with a characteristic transverse-momentum scale. Moreover, to a very good approximation the transverse-momentum spectra of hadrons are the same for isotropic and anisotropic systems, provided the size of the system at freeze-out is appropriately adjusted. We further show that this invariance may be used to improve the agreement between the model and experimental HBT results.

7 pages, 4 figures

References in corpus (7)

• Therminator: Thermal heavy-Ion generator
• Initial condition for hydrodynamics, partonic free streaming, and the uniform description of soft observables at RHIC
• Femtoscopy in hydro-inspired models with resonances
• Identified-particle production and spectra with the ALICE detector in pp and Pb-Pb collisions at the LHC
• Azimuthally-sensitive femtoscopy from RHIC to LHC in hydrodynamics with statistical hadronization
• Projection method for boost-invariant and cylindrically symmetric dissipative hydrodynamics
• Single-freeze-out model for ultra relativistic heavy-ion collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV and the LHC proton puzzle

Cited by in corpus (1)

• Transport coefficients in second-order non-conformal viscous hydrodynamics