Nuclear
Physics Colloquium
Institute for Theoretical Physics, Physics Building, Seminar Room PHYS
2.116
Time: Thursday, April 16, 4:30-5:30 pm (s.t.) (plus
10min for discussion)
Contact: hees@fias.uni-frankfurt.de
Flow anisotropies due to
momentum feeding from hard partons
Boris Tomášik (Matej Bel University
in Banska Bystrica, Slovakia and Czech Technical University in Prague)
In
nuclear collisions at the LHC, partons with high $p_t$ are produced
copiously in the initial interactions. Most of the time they are
quenched by the hydrodynamically evolving bulk matter. However, until
this happens they may fly a bit through the plasma and deposit their
momentum into it. Thus streams are generated in the fluid which carry
the momentum originally due to partons. We show that the interplay of
many such streams correlates the resulting flow anisotropy with the
geometrical anisotropy of the fireball and contributes positively to the
elliptic flow. Moreover, this mechanism clearly generates important
contributions to flow anisotropies at all observable orders.
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