Towards a QCD equation of state with 2 + 1 + 1 flavors using the HISQ action

Conference · Sun Jan 01 00:00:00 EST 2012 · PoS

OSTI ID:1405088

Bazavov, A. ^[1]; Bernard, C. ^[2]; DeTar, C. ^[3]; Foley, J. ^[3]; Gottlieb, Steven ^[4]; Heller, Urs M. ^[5]; Hetrick, J. E. ^[6]; Laiho, J. ^[7]; Levkova, L. ^[3]; Osborn, J. ^[8]; Sugar, R. ^[9]; Toussaint, D. ^[10]; Van de Water, R. S. ^[11]; Zhou, R. ^[4]

---

1. Brookhaven
2. Washington U., St. Louis
3. Utah U.
4. Indiana U.
5. APS, New York
6. U. Pacific, Stockton
7. Strathclyde U.
8. Argonne
9. UC, Santa Barbara
10. Arizona U.
11. Fermilab

We present first, preliminary results for the QCD equation of state with 2+1+1 flavors of highly improved staggered quarks (HISQ), that is, including the effects of a dynamical charm quark. This first study uses a line of constant physics (LCP) with the light-quark mass at ml+ms/5 and physical stange- and charm-quark masses. With increasing temperature, the ffects of the cahrm quark, as in earlier partially quenched studies, start to be visible at temperatures wher the equation of stat is becoming insensitive to the value of the light (up/down) quark mass.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: MILC
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1405088
• Report Number(s): FERMILAB-CONF-12-811-T; 1216391
• Journal Information: PoS, Vol. LATTICE2012; Conference: 30th International Symposium on Lattice Field Theory, Cairns, Australia, 06/24-06/29/2012
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS