On the existence of a phase transition for QCD with three light quarks

Journal Article · Mon Nov 12 04:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.65.2491· OSTI ID:6254788

Brown, F R; Butler, F P; Chen, H; Christ, N H; Dong, Z; Schaffer, W; Unger, L I; Vaccarino, A ^[1]

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1. Department of Physics, Columbia University, New York, NY (USA)

We report full QCD simulations on a 16{sup 3}{times}4 lattice. For two degenerate flavors no finite-temperature phase transition is found for quark masses of {ital ma}=0.01 and 0.025, where {ital a} is the lattice spacing, while for three degenerate flavors a first-order transition is easily seen for {ital ma}=0.025. Nature, with nearly massless up and down quarks and one heavier strange quark, lies between these two cases. For {ital m}{sub {ital u}},{ital d}{ital da}=0.025 and {ital m}{sub {ital s}}{ital a}=0.1 we find that {ital m}{sub {ital K}}/{ital m}{sub {rho}}=0.46(1) and that no transition occurs, calling into question the existence of a QCD phase transition.

• OSTI ID: 6254788
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 65:20; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
LATTICE FIELD THEORY
LIE GROUPS
MASS
PHASE TRANSFORMATIONS
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
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