K + → π + π 0 Decay Amplitude with the Wilson Quark Action in Quenched Lattice QCD JLQCD Collaboration
نویسندگان
چکیده
منابع مشابه
ar X iv : h ep - l at / 9 71 10 12 v 1 7 N ov 1 99 7 1 K + → π + π 0 Decay Amplitude in Quenched Lattice QCD ∗
A new study is reported of a lattice QCD calculation of the K → ππ decay amplitude with the Wilson quark action in the quenched approximation at β = 6.1. The amplitude is extracted from the K → ππ Green function, and a conversion to the continuum value is made employing a recent one-loop calculation of chiral perturbation theory. The result is consistent with the experimental value if extrapola...
متن کاملK ̃pp decay amplitude with the Wilson quark action in quenched lattice QCD
~JLQCD Collaboration! Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki 305, Japan Institute for Cosmic Ray Research, University of Tokyo, Tanashi, Tokyo 188, Japan Computing Research Center, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305, Japan Center for Computational Physics, University of Tsukuba, Tsukuba, Ibaraki 305, Japan Institute of Particle and N...
متن کاملO ct 1 99 3 Meson Decay Constants from the Valence Approximation to Lattice QCD
We evaluate f π /m ρ , f K /m ρ , 1/f ρ , and m φ /(f φ m ρ), extrapolated to physical quark mass, zero lattice spacing and infinite volume, for lattice QCD with Wilson quarks in the valence (quenched) approximation. The predicted ratios differ from experiment by amounts ranging from 12% to 17% equivalent to between 0.9 and 2.8 times the corresponding statistical uncertainties.
متن کاملTwisted mass QCD and lattice approaches to the ∆ I = 1 / 2 rule
Twisted mass lattice QCD (tmQCD), generalised to four Wilson quark flavours, can be used for the computation of some weak matrix elements related to ∆I = 1/2 transitions. Besides eliminating unphysical zero modes, tmQCD may alleviate long-standing renormalisation problems of the four-quark operators which contribute to CP-conserving K → π transitions. With an active charm quark, the renormalisa...
متن کاملفاکتور کردن QCD و پاد تقارنهای CP در واپاشیهای هادرونی B→Kπ
This paper studies improved factorization method, in the heavy quark limit, for B→Kπ decays. Paying attention to strong interaction scale AQCD, and calculating all parameters depending on that in the particular scale (the same as µ ) show that we can obtain better and comparable results for branching ratios such as BR(B0 → K0 π 0 )=8.5+0.7-0.5 × 10-6 and BR(B →π k0)=2.26+0.17-0.15 × 10-5, and...
متن کامل