Semileptonic B-decays into positive-parity charmed mesons

Erratum: QCD sum rule analysis of the decaysB→Kl+l<

“…This method, first employed to compute the pion form factor [11], has been widely applied to heavy meson semileptonic decays: for example, in the case of B → D, D * semileptonic transitions, it has been used to compute the Isgur-Wise universal function ξ(y) and the heavy quark mass corrections [12]. Moreover, the decays B → D * * ℓν, where D * * are positive parity (cq) meson states, have been analyzed both for finite heavy quark masses [13] and in the limit m Q → ∞, with the calculation of the universal functions τ1 2 (y) and τ3 2 (y) analogous to the Isgur-Wise function [14]. For the heavy-to-light meson transitions, such as D(B) → π(ρ)ℓν, the various matrix elements have also been computed [15,16]; in the case of B → K * γ, this approach, employed in [17][18][19], has provided us with the prediction R = B(B → K * γ)/B(b → sγ) = 0.17±0.05 [17], that agrees with the central value obtained from the experimental data in eqs.…”

Exclusive semileptonicBsdecays to excitedDsmesons: Search ofHuang1 2004Phys. Rev. D

“…Moreover, the sum rule for the combination (yΛ ′ −Λ)ζ(y) can be obtained independently from the coefficient function Ξ 1 and Ξ 2 in (21) together with (22), respectively. We have double checked that the resulted sum rule for ζ(y) has the same form as (20).…”

“…HQET is a useful tool to describe the spectroscopy and weak decays of hadrons containing a single heavy quark, it provides a systematic method to compute the properties of heavy hadrons via the 1/m Q expansion, where m Q is the heavy quark mass. The study for the non-strange B semileptonic decays into charmed meson doublet (0 + ,1 + ) in HQET can be found in the literatures by using various approaches, including HQET-based considerations [20,21], QCD sum rules [22,23,24] and various quark models [25,26,27,28,29,30]. In this work, we shall calculate the weak decay elements for B s → D * s0 , D * s1 in HQET.…”

QCD sum rules for masses of excited heavy mesons

“…These states have been studied with the sum rules in the full QCD in the literature [7]. We shall see in the following that using the HQET has some advantage for such problems.…”