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Title: The Neutral kaon mixing parameter B(K) from unquenched mixed-action lattice QCD

Abstract

We calculate the neutral kaon mixing parameter B{sub K} in unquenched lattice QCD using asqtad-improved staggered sea quarks and domain-wall valence quarks. We use the '2+1' flavor gauge configurations generated by the MILC Collaboration, and simulate with multiple valence and sea quark masses at two lattice spacings of a {approx} 0.12 fm and a {approx} 0.09 fm. We match the lattice determination of B{sub K} to the continuum value using the nonperturbative method of Rome-Southampton, and extrapolate B{sub K} to the continuum and physical quark masses using mixed action chiral perturbation theory. The 'mixed-action' method enables us to control all sources of systematic uncertainty and therefore to precisely determine B{sub K}; we find a value of B{sub K}{sup {ovr MS},NDR} (2 GeV) = 0.527(6)(21), where the first error is statistical and the second is systematic.

Authors:
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1039293
Report Number(s):
JLAB-THY-09-1080; DOE/OR/23177-2091; arXiv:0905.3947
Journal ID: ISSN 1550-7998; TRN: US1202139
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 81; Journal Issue: 1; Journal ID: ISSN 1550-7998
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; KAONS; PERTURBATION THEORY; QUANTUM CHROMODYNAMICS; QUARKS; SEAS; VALENCE

Citation Formats

Christopher Aubin, Jack Laiho, Ruth S. Van de Water. The Neutral kaon mixing parameter B(K) from unquenched mixed-action lattice QCD. United States: N. p., 2010. Web. doi:10.1103/PhysRevD.81.014507.
Christopher Aubin, Jack Laiho, Ruth S. Van de Water. The Neutral kaon mixing parameter B(K) from unquenched mixed-action lattice QCD. United States. https://doi.org/10.1103/PhysRevD.81.014507
Christopher Aubin, Jack Laiho, Ruth S. Van de Water. 2010. "The Neutral kaon mixing parameter B(K) from unquenched mixed-action lattice QCD". United States. https://doi.org/10.1103/PhysRevD.81.014507. https://www.osti.gov/servlets/purl/1039293.
@article{osti_1039293,
title = {The Neutral kaon mixing parameter B(K) from unquenched mixed-action lattice QCD},
author = {Christopher Aubin, Jack Laiho, Ruth S. Van de Water},
abstractNote = {We calculate the neutral kaon mixing parameter B{sub K} in unquenched lattice QCD using asqtad-improved staggered sea quarks and domain-wall valence quarks. We use the '2+1' flavor gauge configurations generated by the MILC Collaboration, and simulate with multiple valence and sea quark masses at two lattice spacings of a {approx} 0.12 fm and a {approx} 0.09 fm. We match the lattice determination of B{sub K} to the continuum value using the nonperturbative method of Rome-Southampton, and extrapolate B{sub K} to the continuum and physical quark masses using mixed action chiral perturbation theory. The 'mixed-action' method enables us to control all sources of systematic uncertainty and therefore to precisely determine B{sub K}; we find a value of B{sub K}{sup {ovr MS},NDR} (2 GeV) = 0.527(6)(21), where the first error is statistical and the second is systematic.},
doi = {10.1103/PhysRevD.81.014507},
url = {https://www.osti.gov/biblio/1039293}, journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
issn = {1550-7998},
number = 1,
volume = 81,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 2010},
month = {Fri Jan 01 00:00:00 EST 2010}
}