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The kaon B-parameter from unquenched mixed action lattice QCD
| 题名： | The kaon B-parameter from unquenched mixed action lattice QCD |
| 作者： | Van de Water, Ruth S.;Laiho, Jack;Aubin, Christopher A.; |
| 关键词： | Lattice72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CHIRAL SYMMETRY; DECAY; EXTRAPOLATION; KAONS; LATTICE FIELD THEORY; MESONS; PSEUDOSCALAR MESONS; QUANTUM CHROMODYNAMICS; QUARKS; VALENCE |
| 摘要： | We present a preliminary calculation of B{sub K} using domain-wall valence quarks and 2+1 flavors of improved staggered sea quarks. Both the size of the residual quark mass, which measures the amount of chiral symmetry breaking, and of the mixed meson splitting Delta{sub mix}, a measure of taste-symmetry breaking, show that discretization effects are under control in our mixed action lattice simulations. We show preliminary data for pseudoscalar meson masses, decay constants and B{sub K}. We discuss general issues associated with the chiral extrapolation of lattice data, and, as an example, present a preliminary chiral and continuum extrapolation of f{sub pi}. The quality of our data shows that the good chiral properties of domain-wall quarks, in combination with the light sea quark masses and multiple lattice spacings available with the MILC staggered configurations, will allow for a precise determination of B{sub K}. |
| 总页数： | 7pages |
| 报告类型： | 科技报告 |
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