Perturbative Matching of the NRQCD Heavy-Light Axial Current
نویسندگان
چکیده
A one-loop matching calculation between Lattice NRQCD and full QCD for the heavy-light axial current is described and the effects of renormalization on fB are discussed.
منابع مشابه
O ( α s a ) matching coefficients for axial vector current and ∆ B = 2 operator ∗
We present a calculation of the perturbative matching coefficients including mixing with higher dimensional operators for the temporal component of the heavy-light axial current, A4, and the ∆B = 2 operator, OS. For A static, NRQCD 4 , calculations with various RG-improved gauge actions are peformed. Matching coefficients with NRQCD and heavy-clover actions are also compared.
متن کاملB Meson Decay Constants Using NRQCD
Recent results for B meson decay constants with NRQCD b-quarks and clover light quarks are discussed. Perturbative matching factors through O(α/M) are now available and incorporated into the analyses. An O(α a) improvement term to the heavy-light axial current is identified and included. The slope of fP S √ MP S versus 1/MP S is significantly reduced by these corrections.
متن کاملPerturbative renormalization parameters for heavy quarks ∗
Formulation of the heavy quark on the lattice, such as NRQCD[1] or the Fermilab approach with the Wilson-like relativistic quarks[2], requires perturbative matching with the continuum theory. Since the quark mass in the lattice unit cannot be neglected for these theories, the perturbative calculation is much more involved and have not developed as that for the massless case. We report the curre...
متن کاملPerturbative Matching of Heavy-Light Currents with NRQCD Heavy Quarks
Lattice studies of hadronic matrix elements require matching between operators in full continuum QCD and those in the lattice theory being simulated. In the present article we will focus on an effective lattice theory which combines nonrelativistic (NRQCD) heavy quarks and clover light quarks. We wish to match the theories correct through O( p M , α p M , α ap). For heavy meson (e.g. B and B∗) ...
متن کاملar X iv : h ep - l at / 9 71 10 05 v 1 6 N ov 1 99 7 1 Perturbative renormalization parameters for heavy quarks ∗
Formulation of the heavy quark on the lattice, such as NRQCD[1] or the Fermilab approach with the Wilson-like relativistic quarks[2], requires perturbative matching with the continuum theory. Since the quark mass in the lattice unit cannot be neglected for these theories, the perturbative calculation is much more involved and have not developed as that for the massless case. We report the curre...
متن کامل