QCD with dynamical Wilson fermions. II

Journal Article · Fri Nov 15 04:00:00 EST 1991 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.44.3272· OSTI ID:5992916

Gupta, R ^[1]; Baillie, C F ^[2]; Brickner, R G ^[3]; Kilcup, G W ^[4]; Patel, A ^[5]; Sharpe, S R ^[6]

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1. T-8, MS-B285, Los Alamos National Laboratory, Los Alamos (New Mexico 87545 (P.))
2. Physics Department, University of Colorado, Boulder, Colorado (USA)
3. C-Division, Los Alamos National Laboratory, Los Alamos, New Mexico (USA)
4. Physics Department, The Ohio State University, Columbus, Ohio (USA)
5. Indian Institute of Science, Bangalore 560012 (India). Supercomputer Education and Research Centre Indian Institute of Science Bangalore 560012 (India). Centre for Theoretical Studies
6. Physics Department, University of Washington, Seattle, Washington (USA)

We present results for the QCD spectrum and the matrix elements of scalar and axial-vector densities at {beta}=6/{ital g}{sup 2}=5.4,5.5,5.6. The lattice update was done using the hybrid Monte Carlo algorithm to include two flavors of dynamical Wilson fermions. We have explored quark masses in the range {ital m}{sub {ital s}}{le}{ital m}{sub {ital q}}{le}3{ital m}{sub {ital s}}. The results for the spectrum are similar to quenched simulations and mass ratios are consistent with phenomenological heavy-quark models. The results for matrix elements of the scalar density show that the contribution of sea quarks is comparable to that of the valence quarks. This has important implications for the pion-nucleon {sigma} term.

• DOE Contract Number: FG03-85ER25009; AC03-81ER40050; AS06-88ER40423
• OSTI ID: 5992916
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 44:10; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662230* -- Quantum Chromodynamics-- (1992-)
662440 -- Properties of Other Particles Including Hypothetical Particles-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGORITHMS
BOSONS
COLLISIONS
COMPOSITE MODELS
DIMENSIONS
DISTRIBUTION FUNCTIONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FLAVOR MODEL
FUNCTIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
LENGTH
MASS
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
MATHEMATICAL SPACE
MATRIX ELEMENTS
MESON-MESON INTERACTIONS
MESONS
MOLECULE COLLISIONS
MONTE CARLO METHOD
PARTICLE INTERACTIONS
PARTICLE MODELS
PHASE SPACE
PION-PION INTERACTIONS
PIONS
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKONIUM
SCATTERING LENGTHS
SPACE
WILSON LOOP