Lattice QCD with eight light-quark flavors

Journal Article · Tue Dec 15 04:00:00 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), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 46:12; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662120 -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662230* -- Quantum Chromodynamics-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRAL SYMMETRY
COMPOSITE MODELS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FLAVOR MODEL
LATTICE FIELD THEORY
MASS
MATHEMATICAL MODELS
NUCLEAR MODELS
PARTICLE MODELS
PHASE TRANSFORMATIONS
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKS
SYMMETRY
SYMMETRY BREAKING
TEMPERATURE DEPENDENCE
VALENCE
WEAK-COUPLING MODEL