Seminar in Hadronic Physics
The Initial Phase in High Energy Nuclear Collisions: How Far Can We Go With Analytic Solutions?
Rainer J. Fries
Cyclotron Insitute and Department of Physics and
Astronomy Texas A&M University
Color Glass Condensate (CGC) is believed to be the correct effective description
of QCD in collisions of hadrons and nuclei at asymptotically large energies. In
recent years CGC has been used to calculate the initial phase of heavy
ion collision. This is followed by the rapid creation of quark gluon plasma
(QGP) close to local kinetic equilibrium, which subsequently can be described
through the application of dissipative fluid dynamics. In particular the IP
glasma model stands out as a numerical implementation of CGC, which serves to
initialize the subsequent fluid phase. Calculations using IP glasma have been
very successful when compared to data from the Relativistic Heavy Ion Collider
(RHIC) and the Large Hadron Collider (LHC). In this talk I will advocate that
additional insight into the underlying physical mechanisms can be gained from
analytic solutions to the CGC problem at early times. Using recursive solutions
to the pertinent Yang-Mills equations we analyze the early field strength and
energy momentum tensors in the system. We then discuss how the features we find
translate into dissipative fluid dynamics and possibly into observables. We
also give a preview of a semi-analytic event generator based on these ideas.
Thursday, November 3rd 2016, 14:30
Ernest Rutherford Physics Building, R.E. Bell Conference Room (room 103)
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