منابع مشابه
fB and fBs using NRQCD
This talk summarizes the quenched calculation of fB and fBs presented in [1]. The heavy quark is simulated using an O(1/M) improved NRQCD action, and the tadpole improved clover action is used for the light quarks. The axial current includes the O(1/M) corrections in one-loop perturbation theory and the O(1/M) ones at tree-level. We discuss the various systematic effects and consistency checks ...
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B physics is a subject of active research. The theoretical and experimental understanding of the B meson and b baryon spectrum is just beginning. Weak matrix elements of B mesons, e.g. fB, fBs , BB, and BBs are being studied to determine fundamental parameters of the Standard Model. This review summarizes the progress made in calculating the B spectrum and decay constants using the nonrelativis...
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We report results on fB and semi-leptonic B decay form factors using NRQCD. We investigate 1/M scaling behavior of decay amplitudes. For fB Effect of higher order relativistic correction terms are also studied.
متن کاملUnquenched Charmonium with NRQCD
We present results from a series of NRQCD simulations of the charmonium system, both in the quenched approximation and with nf = 2 dynamical quarks. The spectra show evidence for quenching effects of ∼ 10% in the Sand P -hyperfine splittings. We compare this with other systematic effects. Improving the NRQCD evolution equation altered the S-hyperfine by as much as 20 MeV, and we estimate O(αs) ...
متن کاملUnified Systems of FB-SPDEs/FB-SDEs with Jumps/Skew Reflections and Stochastic Differential Games
Abstract We study four systems and their interactions. First, we formulate a unified system of coupled forward-backward stochastic partial differential equations (FB-SPDEs) with Lévy jumps, whose drift, diffusion, and jump coefficients may involve partial differential operators. An solution to the FB-SPDEs is defined by a 4-tuple general dimensional random vector-field process evolving in time ...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 1999
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(99)85074-9