Nuclear Physics & RIKEN Theory Seminar

"Radiative energy loss and v2 spectra for viscous hydro"

Presented by Derek Teaney, Stony Brook University

Friday, October 16, 2009, 2:00 pm — Small Seminar Room, Bldg. 510

This work investigates the consequence of the non-equilibrium phase space distribution on spectra and elliptic flow. We show that the departure from equilibrium on the freezeout surface dominates viscous corrections to $v_2(p_T)$. However, the energy dependence of the departure from equilibrium is not known {\it a priori}. We argue that it is probably not $\propto p_T^2$ as has generally been assumed; and it is generally different for different species. Weaker $p_T$ dependence would lead to straighter $v_2(p_T)$ curves at the same value of viscosity. A species dependent equilibration rate, with baryons equilibrating faster than mesons, can explain "constituent quark scaling" without invoking coalescence models.

Hosted by: Kevin Dusling

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