The QCD equation of state

20 May 2014, 12:50
20m
helium (darmstadtium)

helium

darmstadtium

Schlossgraben 1 64283 Darmstadt Germany
Contributed Talk QCD at High Temperature and/or Density QCD at high temperature and/or density

Speaker

Alexei Bazavov (University of Iowa)

Description

The quark-gluon plasma (QGP), the deconfined high-temperature phase of QCD, is currently under extensive investigation in heavy-ion collision experiments at RHIC and LHC. The transition from the hadronic, low-temperature phase to the QGP is a rapid crossover, manifested by a significant change in bulk thermodynamic quantities. A fundamental characteristic of QCD is the equation of state, which is also an essential ingredient of hydrodynamic modeling of heavy-ion collisions. We report our final result for the 2+1 flavor QCD equation of state in the continuum limit. We calculate the pressure, energy density and other thermodynamic quantities in the experimentally relevant temperature range $140-400$ MeV. We use the highly improved staggered quark (HISQ) action with the Goldstone pion mass tuned to about $160$ MeV in the continuum limit. To perform the continuum extrapolation we use lattices with temporal extent $N_\tau=6$, $8$, $10$ and $12$.
On behalf of collaboration: [Other]

Primary author

Alexei Bazavov (University of Iowa)

Presentation Materials