Hadron spectrum in QCD at 6/ g sup 2 =5. 6

Journal Article · Sat Dec 01 04:00:00 EST 1990 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.42.3794· OSTI ID:5697796

Bitar, K M; Edwards, R; Heller, U M; Kennedy, A D; Liu, W ^[1]; DeGrand, T A ^[2]; Gottlieb, S; Krasnitz, A ^[3]; Kogut, J B; Renken, R L ^[4]; Ogilvie, M C ^[5]; Rossi, P ^[6]; Sinclair, D K; Wang, K C ^[7]; Sugar, R L ^[8]; Teper, M ^[9]; Toussaint, D ^[10]

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1. Supercomputer Computations Research Institute, The Florida State University, Tallahassee, FL (USA)
2. Physics Department, University of Colorado, Boulder, CO (USA)
3. Department of Physics, Indiana University, Bloomington, IN (USA)
4. Department of Physics, University of Illinois, 1110 W. Green Street, Urbana, IL (USA)
5. Department of Physics, Washington University, St. Louis, MO (USA)
6. Department of Physics, University of California at San Diego, La Jolla, CA (USA)
7. High Energy Physics Division, Argonne National Laboratory, Argonne, IL (USA)
8. Department of Physics, University of California, Santa Barbara, CA (USA)
9. Department of Theoretical Physics, University of Oxford, Oxford OX13NP (United Kingdom)
10. Department of Physics, University of Arizona, Tuc

We have carried out a simulation of QCD using the hybrid-molecular-dynamics algorithm with two flavors of staggered quarks. The spectrum was calculated for 6/{ital g}{sup 2}=5.6 and dynamical quark masses {ital am}{sub {ital q}}=0.025 and 0.01. Lattice sizes of 12{sup 4}, 12{sup 3}{times}24, and 16{sup 4} were used to generate the gauge configurations. Hadron propagators were calculated with both staggered and Wilson quarks on doubled or quadrupled lattices. Finite-size effects are visible on the smaller lattices. Some improvement in the {rho}-to-nucleon mass ratio and chiral symmetry is seen as compared to previous calculations, but, as in most lattice calculations, the proton-to-{rho} mass ratio remains larger than in the real world and the proton-{Delta} splitting is too small.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38; FC05-85ER25000
• OSTI ID: 5697796
• Journal Information: Physical Review, D (Particles Fields); (USA), Journal Name: Physical Review, D (Particles Fields); (USA) Vol. 42:11; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645400* -- High Energy Physics-- Field Theory
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGORITHMS
BARYONS
CHIRAL SYMMETRY
COMPOSITE MODELS
COMPUTERIZED SIMULATION
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FLAVOR MODEL
GAUGE INVARIANCE
HADRONS
INVARIANCE PRINCIPLES
LATTICE FIELD THEORY
MASS SPECTRA
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
MOLECULES
NUCLEONS
PARTICLE MODELS
POSTULATED PARTICLES
PROPAGATOR
PROTONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKS
SIMULATION
SPECTRA
SYMMETRY
VALENCE