Lattice QCD with eight light-quark flavors

Journal Article · Tue Dec 15 00:00:00 EST 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.46.5655· OSTI ID:6936865

Brown, F R; Chen, H; Christ, N H; Dong, Z; Mawhinney, R D; Schaffer, W; Vaccarino, A ^[1]

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1. Department of Physics, Columbia University, New York, New York 10027 (United States)

QCD with eight flavors is studied on 16[sup 3][times][ital N][sub [ital t]] lattices with [ital N][sub [ital t]]=4, 6, 8, 16, and 32, a dynamical quark mass [ital ma]=0.015, and lattice coupling [beta]=6/[ital g][sup 2] between 4.5 and 5.0. For [ital N][sub [ital t]]=16 and 32, hadron masses and screening lengths are computed for a variety of valence quark masses. The previously observed, strong, first-order transition for [ital N][sub [ital t]]=4, 6, and 8 is seen, for [ital N][sub [ital t]]=16, to become a [beta]-independent, zero-temperature transition characterized by a factor of [approx]3 change in lattice scale. This strong, first-order transition restores chiral symmetry, at least for [ital N][sub [ital t]]=4, 6, and 8, producing a chirally symmetric, weak-coupling phase. However, as [ital N][sub [ital t]] increases to 16, the chiral-symmetry properties of the weak-coupling side of the zero-temperature transition are unclear and offer a hint of a normal, finite-temperature, chiral-symmetry-breaking transition in the weak-coupling phase.

• OSTI ID: 6936865
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 46:12; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
LATTICE FIELD THEORY
QUANTUM CHROMODYNAMICS
SYMMETRY BREAKING
CHIRAL SYMMETRY
FLAVOR MODEL
MASS
PHASE TRANSFORMATIONS
QUARKS
TEMPERATURE DEPENDENCE
VALENCE
WEAK-COUPLING MODEL
COMPOSITE MODELS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
MATHEMATICAL MODELS
NUCLEAR MODELS
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
QUARK MODEL
SYMMETRY
662230* - Quantum Chromodynamics- (1992-)
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Currents & Their Properties- (1992-)