Speaker
Edward Shuryak
(stony brook university)
Description
Large energy deposition from LHC quenching jets restarted interest
to shock formation. Shocks also have theoretical significance as
the simplest out-of-equilibrium setting without time dependence.
While weak shocks have small gradients and can be
treated hydrodynamically in the Navier-Stokes (NS) approximation,
the ones without a small parameter (strong shocks) needs other methods.
Two of those will be applied: (i) the ``resummed hydrodynamics" proposed
earlier by Lublinsky and myself; and (ii) AdS/CFT correspondence, which
uses the modified Einstein equations. In the latter case we apply
novel variational approach and find approximate solution good to within
fraction of a percent. The conclusion from both treatments is that the
strong shocks deviate from NS only be few percent, in the direction
of thinner shocks. We also discuss how shock formation shoulc modify the
predictions for jet-hadron and hard hadron-hadron correlators.
Author
Edward Shuryak
(stony brook university)
