Skip to Main content Skip to Navigation
Journal articles

Viscous corrections to anisotropic flow and transverse momentum spectra from transport theory

Abstract : Viscous hydrodynamics is commonly used to model the evolution of the matter created in an ultra-relativistic heavy-ion collision. It provides a good description of transverse momentum spectra and anisotropic flow. These observables, however, cannot be consistently derived using viscous hydrodynamics alone, because they depend on the microscopic interactions at freeze-out. We derive the ideal hydrodynamic limit and the first-order viscous correction to anisotropic flow ($v_2$, $v_3$ and $v_4$) and momentum spectrum using a transport calculation. The linear response coefficient to the initial anisotropy, $v_n(p_T)/\varepsilon_n$, depends little on $n$ in the ideal hydrodynamic limit. The viscous correction to the spectrum depends not only on the differential cross section, but also on the initial momentum distribution. This dependence is not captured by standard second-order viscous hydrodynamics. The viscous correction to anisotropic flow increases with $p_T$, but this increase is slower than usually assumed in viscous hydrodynamic calculations. In particular, it is too slow to explain the observed maximum of $v_n$ at $p_T\sim 3$ GeV/c.
Complete list of metadata

Cited literature [29 references]  Display  Hide  Download
Contributor : Emmanuelle De Laborderie Connect in order to contact the contributor
Submitted on : Monday, May 30, 2016 - 4:42:03 PM
Last modification on : Monday, December 13, 2021 - 9:16:04 AM
Long-term archiving on: : Wednesday, August 31, 2016 - 10:40:06 AM


Files produced by the author(s)



Salvatore Plumari, Giovanni Luca Guardo, Vincenzo Greco, Jean-Yves Ollitrault. Viscous corrections to anisotropic flow and transverse momentum spectra from transport theory. Nuclear Physics A, Elsevier, 2015, 2015 (06), pp.005. ⟨10.1016/j.nuclphysa.2015.06.005⟩. ⟨cea-01323571⟩



Record views


Files downloads