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Kaon B parameter with Wilson fermions

Gupta, Rajan and Daniel, David and Kilcup, Gregory W and Patel, Apoorva and Sharpe, Stephen R (1993) Kaon B parameter with Wilson fermions. In: Physical Review D – Particles and Fields, 47 (11). pp. 5113-5127.

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Official URL: http://prd.aps.org/abstract/PRD/v47/i11/p5113_1


We calculate the kaon 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 p=(0,0,0) and 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 B parameters of the DELTAI = 3/2 part of the electromagnetic penguin operators, and preliminary results for B(K) in the presence of two flavors of dynamical quarks.

Item Type: Journal Article
Publication: Physical Review D – Particles and Fields
Publisher: The American Physical Society
Additional Information: Copyright of this article belongs to The American Physical Society.
Department/Centre: Division of Interdisciplinary Sciences > Supercomputer Education & Research Centre
Division of Physical & Mathematical Sciences > Centre for Theoretical Studies (Ceased to exist at the end of 2003)
Date Deposited: 11 Feb 2011 06:38
Last Modified: 11 Feb 2011 06:38
URI: http://eprints.iisc.ac.in/id/eprint/35523

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