Deconfinement and chiral transition with the highly improved staggered quark (HISQ) action

Abstract

We report on investigations of the chiral and deconfinement aspects of the finite temperature transition in 2+1 flavor QCD using the Highly Improved Staggered Quark (HISQ) action on lattices with temporal extent $N_{\tau }=6$ and $N_{\tau }=8$. We have performed the calculations for physical values of the strange quark mass $m_s$ and the light quark masses $m_l=0.2m_s$ and $0.05m_s$. Several finite temperature observables, including the renormalized Polyakov loop, the renormalized chiral condensate and the chiral susceptibility have been calculated. We also study the fluctuations and correlations of different conserved charges as well as the trace anomaly at finite temperature. We compare our findings with previous calculations that use different improved staggered fermion formulations: asqtad, p4 and stout.

16 pages, 17 figures, talk presented at the 26th Winter Workshop on Nuclear Dynamics, Ocho Rios, Jamaica, January 2-9, 2010, to be published in Journal of Physics: Conference Series (JPCS)

References in corpus (9)

• The QCD transition temperature: results with physical masses in the continuum limit
• The QCD transition temperature: results with physical masses in the continuum limit II.
• The QCD Equation of State with almost Physical Quark Masses
• Equation of state and QCD transition at finite temperature
• QCD Equation of State and Hadron Resonance Gas
• Highly Improved Staggered Quarks on the Lattice, with Applications to Charm Physics
• Equation of State for physical quark masses
• On the magnetic equation of state in (2+1)-flavor QCD
• Lattice QCD at finite temperature : present status

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