Speaker
Mr
Daniel Pablos
(Universitat de Barcelona)
Description
Within a hybrid strong/weak coupling model for jets in strongly coupled
plasma, we explore jet modifications in ultra-relativistic heavy ion
collisions. Our approach merges the perturbative dynamics of hard jet
evolution with the strongly coupled dynamics which dominates the soft
exchanges between the fast partons in the jet shower and the
strongly coupled plasma itself. We implement this
approach in a Monte Carlo, which supplements the DGLAP shower with the
energy loss dynamics as dictated by holographic computations, up
to a single free parameter that we fit to data. We
confront our model with available single jet, dijet and photon-jet data in
Pb-Pb collisons at $\sqrt{s}=2.76$~ATeV and we obtain a satisfactory
description after fitting one single parameter. We use our model to
predict a broad range of dijet, photon-jet and Z-jet observables for
the upcoming LHC Run II, at $\sqrt{s}=5.02$~ATeV. We then augment
the model by incorporating the transverse momentum picked up by
each parton in the shower as it propagates through the medium, at
the expense of adding a second free parameter. We use this model to
discuss the influence of the transverse broadening of the partons in a jet
on intra-jet observables. In addition, we explore the sensitivity of such
observables to the back-reaction of the plasma to the passage of the jet.
Finally, we comment on the sensitivity of the different observables we
have analyzed to the microscopic dynamics of the jet-plasma interaction.
Authors
Mr
Daniel Pablos
(Universitat de Barcelona)
Mrs
Doga Gülhan
(MIT)
Dr
Guilherme Milhano
(CERN)
Dr
Jorge Casalderrey-Solana
(Universitat de Barcelona)
Prof.
Krishna Rajagopal
(MIT)
