Speaker
Hannah Petersen
(Duke University)
Description
This talk will discuss how triangular flow measurements in Pb+Pb collisions at
the LHC can be used to constrain the origin of initial state fluctuations. We
explore the energy dependence of elliptic and triangular flow within a
(3+1)-dimensional hybrid framework starting from a non-equilibrium initial state
with event-by-event fluctuations and including an ideal hydrodynamical expansion
phase followed by hadronic Boltzmann transport. This approach has been shown to
describe well the existing RHIC and LHC data on bulk observables such as
particle yields, spectra and elliptic flow. The initial energy deposition can be
modeled either in a partonic or a hadronic picture using, respectively, a parton
cascade or the hadronic transport model UrQMD. We present a
detailed comparison between the shape and fluctuations of the two initial
conditions prior to the hydrodynamical evolution. Our analysis then compares the
differences in final state observables such as triangular flow in order to
identify sensitivities to the degrees of freedom driving the energy deposition.
Primary author
Hannah Petersen
(Duke University)
Co-authors
Berndt Mueller
(Duke University)
Steffen Bass
(Duke University)
