BK from quenched QCD with exact chiral symmetry.
نویسندگان
چکیده
We present a calculation of the standard model DeltaS=2 matrix element relevant to indirect CP violation in K-->pipi decays which uses Neuberger's chiral formulation of lattice fermions. The computation is performed in the quenched approximation on a 16(3) x 32 lattice that has a lattice spacing a approximately 0.1 fm. The resulting bare matrix element is renormalized nonperturbatively. Our main result is B(RGI)(K)=0.87(8)+2+14-1-14, where the first error is statistical, the second is systematic, and the third is Sharpe's estimate of quenching and flavor-SU(3) breaking uncertainties.
منابع مشابه
Non-perturbative renormalization of four-quark operators and BK with Schrödinger functional scheme in quenched domain-wall QCD
We present non-perturbative renormalization factors for ∆S = 2 four-quark operators in quenched domain-wall QCD using the Schrödinger functional method. Non-perturbative renormalization factor for BK is evaluated at hadronic scale. Combined with the non-perturbative RG running obtained by the Alpha collaboration, our result yields renormalization factor which converts lattice bare BK to the ren...
متن کاملQuenched chiral logarithms in lattice QCD with exact chiral symmetry
We examine quenched chiral logarithms in lattice QCD with overlap Dirac quark. For 100 gauge configurations generated with the Wilson gauge action at β = 5.8 on the 83 × 24 lattice, we compute quenched quark propagators for 12 bare quark masses. The pion decay constant is extracted from the pion propagator, and from which the lattice spacing is determined to be 0.147 fm. The presence of quenche...
متن کاملLight quark masses, chiral condensate and quark-gluon condensate in quenched lattice QCD with exact chiral symmetry
We determine several quantities in quenched lattice QCD with exact chiral symmetry. For 100 gauge configurations generated with Wilson gauge action at β = 6.0 on the 163 × 32 lattice, we compute quenched quark propagators for 13 bare quark masses. The pion decay constant is extracted from the pion propagator, and from which the inverse lattice spacing is determined to be a−1 = 1.979(6) GeV. The...
متن کاملBaryon Masses in Lattice QCD with Exact Chiral Symmetry
We investigate the baryon mass spectrum in quenched lattice QCD with exact chiral symmetry. For 100 gauge configurations generated with Wilson gauge action at β = 6.1 on the 20×40 lattice, we compute (point-to-point) quark propagators for 30 quark masses in the range 67 MeV ≤ mq ≤ 1790 MeV. For baryons only composed of strange and charm quarks, their masses are extracted directly from the time ...
متن کاملLight quark masses in quenched QCD with exact chiral symmetry
The parameters in the pseudoscalar meson mass formula in quenched chiral perturbation theory to one-loop order are determined by quenched lattice QCD with overlap Dirac operator, and from which the light quark masses are determined with the experimental inputs of pion and kaon masses, and the pion decay constant. Our results are mu,d = 4.0 ± 0.2 MeV, and ms = 87 ± 5 MeV, in the MS scheme at sca...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review letters
دوره 92 4 شماره
صفحات -
تاریخ انتشار 2004