Speaker
Koichi Murase
(The University of Tokyo)
Description
The hydrodynamic fluctuations are thermal fluctuations arising in the
event-by-event hydrodynamic evoluation of the system, and its power
spectrum is determined through the fluctuation-dissipation relation.
While, the higher harmonics $v_n$ are systematically observed in RHIC and
LHC and attract a lot of theoretical and experimental interests. Initial
state fluctuations turned out to be important to explain these higher
harmonics through event-by-event hydrodynamic simulations. The
event-by-event hydrodynamic fluctuation, although its average is locally
zero, also has effects on the higher harmonics and other observables in
the same manner as the initial fluctuations which vanish in the averaged
picture of the initial condition. We implement causal hydrodynamic
fluctuation [1] in our (3+1)-dimensional dissipative hydrodynamics code,
and investigate the effect of the hydrodynamic fluctuation,in addition
to the initial state fluctuations, on higher harmonics.
Primary author
Koichi Murase
(The University of Tokyo)
Co-author
Tetsufumi Hirano
(Sophia Univ)
