Kaon [ital B] parameter with Wilson fermions

Journal Article · Tue Jun 01 04:00:00 EDT 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.47.5113· OSTI ID:6583511

Gupta, R; Daniel, D ^[1]; Kilcup, G W ^[2]; Patel, A ^[3]; Sharpe, S R ^[4]

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1. Los Alamos National Laboratory, T-8, MS-B285, Los Alamos, New Mexico 87545 (United States)
2. Physics Department, Ohio State University, Columbus, Ohio 43210 (United States)
3. Supercomputer Education and Research Centre and Centre for Theoretical Studies, Indian Institute of Science, Bangalore 560012 (India)
4. Physics Department FM-15, University of Washington, Seattle, Washington 98195 (United States)

We calculate the kaon [ital B] parameter in quenched lattice QCD at [beta]=6.0 using Wilson fermions at [kappa]=0.154 and 0.155. We use two kinds of nonlocal ( smeared'') sources for quark propagators to calculate the matrix elements between states of definite momentum. The use of smeared sources yields results with much smaller errors than obtained in previous calculations with Wilson fermions. By combining results for [bold p]=(0,0,0) and [bold p]=(0,0,1), we show that one can carry out the noperturbative subtraction necessary to remove the dominant lattice artifacts induced by the chiral-symmetry-breaking term in the Wilson action. Our final results are in good agreement with those obtained using staggered fermions. We also present results for [ital B] parameters of the [Delta][ital I]=3/2 part of the electromagnetic penguin operators, and preliminary results for [ital B][sub [ital K]] in the presence of two flavors of dynamical quarks.

• DOE Contract Number: AC05-84ER40150
• OSTI ID: 6583511
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 47:11; 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
BOSONS
CHIRAL SYMMETRY
COMPOSITE MODELS
ELEMENTARY PARTICLES
FIELD THEORIES
FLAVOR MODEL
HADRONS
KAONS
LATTICE FIELD THEORY
MATHEMATICAL MODELS
MATRIX ELEMENTS
MESONS
PARTICLE MODELS
PROPAGATOR
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
STRANGE MESONS
STRANGE PARTICLES
SYMMETRY
SYMMETRY BREAKING