Kaon weak matrix elements with Wilson fermions
نویسندگان
چکیده
منابع مشابه
The Kaon B-parameter with Wilson Fermions
We calculate the kaon B-parameter in quenched lattice QCD at β = 6.0 using Wil-son fermions at κ = 0.154 and 0.155. We use two kinds of non-local (" 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 combin...
متن کاملKaon B - parameter with N F = 2 dynamical Wilson fermions
We present a preliminary study of the neutral kaon mixing bag parameter B K using two flavors of dynamical Wilson fermions. We determine the matrix element of the relevant ∆S 2 operator by using both the conventional approach and the so called " non-subtraction method " , and find that the latter leads to results with smaller uncertainties. After having implemented non-perturbative renormalizat...
متن کاملDomain wall quarks and kaon weak matrix elements
We present lattice calculations of kaon matrix elements with domain wall fermions. Using lattices with 6/g2 = 5.85, 6.0, and 6.3, we estimate BK(μ ≈ 2 GeV) = 0.628(47) in quenched QCD which is consistent with previous calculations. At 6/g2 = 6.0 and 5.85 we find the ratio fK/mρ in agreement with the experimental value, within errors. These results support expectations that O(a) errors are expon...
متن کاملKaon Weak Matrix Elements in 2+1 flavor DWF QCD
K → π and K → 0 weak matrix elements of ∆S = 1 operators have been measured in 2+1 flavor domain wall fermion (DWF) QCD on (3 fm)3 lattices with a−1 = 1.73(3) GeV. As is well known, using these matrix elements and chiral perturbation theory allows a determination of the K → ππ matrix elements that enter in the quantitative value for the ∆I = 1/2 rule and ε ′/ε . Two light dynamical sea quark ma...
متن کاملRecent progress in calculating weak matrix elements using staggered fermions
We present a chronological review of the progress in calculating weak matrix elements using staggered fermions. We review the perturbative calculation of one-loop matching formula including both current-current diagrams and penguin diagrams using improved staggered fermions. We also present preliminary results of weak matrix elements relevant to CP violation calculated using the improved (HYP (...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2003
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(03)01551-2