Hadron masses with two quark flavors

Steven Gottlieb, W. Liu, R. L. Renken, R. L. Sugar, D. Toussaint

Research output: Contribution to journalArticle

89 Scopus citations

Abstract

We investigate the hadron mass spectrum in lattice QCD with two flavors of dynamical quarks. We use 63×24, 83×24, and 103×24 lattices with 6/g2 adjusted so that the thermal crossover temperature is 1/4a or 1/6a. At these values of 6/g2 flavor symmetry is not restored and the familiar problem of the nucleon to mass ratio is not fixed by the dynamical fermions. For comparison and checking we measure the spectrum in the quenched approximation using analogous couplings and identical methods. The effects of the finite spatial size are investigated and found to be small. We discuss our fitting procedures and our control of systematic errors in some detail. We combine our mass measurements with previous calculations to estimate the temperature for the transition to a chirally symmetric phase of QCD in physical units.

Original languageEnglish (US)
Pages (from-to)2245-2265
Number of pages21
JournalPhysical Review D
Volume38
Issue number7
DOIs
StatePublished - Jan 1 1988
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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    Gottlieb, S., Liu, W., Renken, R. L., Sugar, R. L., & Toussaint, D. (1988). Hadron masses with two quark flavors. Physical Review D, 38(7), 2245-2265. https://doi.org/10.1103/PhysRevD.38.2245