Nuclear Physics Colloquium
Location:
Physics Building Science
Campus Riedberg, Max-von-Laue-Str. 1, room
PHYS __.102
Time: Tuesday, June 11, 2013,
1:00-2:00pm (plus
10min for discussion)
Contact: hees@fias.uni-frankfurt.de
Initial state from the NLO pQCD + local saturation model
Harri Niemi (University of Jyväskylä)
The essential input to the fluid dynamical evolution in heavy-ion
collisions is the energy density profile in the transverse
plane. For example the
spatial eccentricity of the profile determines the strenght of the
pressure gradients that eventually leads to the azimuthal asymmetry
of the momentum spectra of
hadrons, i.e. non-zero $v_n$'s. Similarly, the centrality dependence
of the multiplicity is mainly determined by the initial conditions.
Our calculation of the initial state is based on the next-to-leading
order pQCD calculation of transverse energy, supplemented by a
transversally local saturation
condition. Uncertainties of the model are addressed, and we compare
the initial state model with data form the LHC using a full fluid
dynamical evolution.
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