[PDF] Top 20 B and D meson decay constants in lattice QCD

... ground and first excited states and the observed agreement between the ground state energies obtained in one- and two- state fits suggests that the contamination from excited states is small in the region used for ... See full document

... A lattice QCD calculation of the B ¯ → Dl ␯ ¯ decay form factors is presented. We obtain the value of the form factor h ⫹ (w) at the zero-recoil limit w ⫽ 1 with high precision by considering ... See full document

... of D decays, the E dependence of the rate has been measured only for D → Kl ␯ 关 7 兴 ...mode D → ␲ l ␯ . First measurements of the branching ratios for B → ␲ l ␯ and B → ␳ l ␯ have been ... See full document

... full QCD (with u, d, s and c quarks in the sea) ensembles of gluon field configurations at two values of the lattice spacing and two values of the sea u/d quark ... See full document

... The experimental status of the charm sector of Quantum Chromodynamics (QCD) has changed dramatically over the last decade [1]. The discovery of a plethora of unexpected charmonium-like states, commonly known as ... See full document

... and D ∗ K thresholds, but they were experimentally found slightly below ...the meson sector, and therefore deserve special attention. The first lattice simulation that takes the effect of these ... See full document

... the n-th state of the meson. We have taken for simplicity t 0 = 0 by always shifting the source time in the correlators to the origin of the lattice. In the two-point correlators apart from ground state, ... See full document

... The simulations were performed using domain wall fermions (DWF) with a gauge action which we call IDSDR. This is the Iwasaki action modified by a weight- ing factor, called the Dislocation Suppressing Determi- nant Ratio ... See full document

... The oscillating parity partner state (pion) is well determined and consistent with direct mea- surement using a pseuoscalar operator. Qualitatively simliar behaviour is seen in the other ensem- bles (A and B). The ... See full document

... Abstract. In the framework of the so-called extended linear sigma model (eLSM), we include a pseudoscalar glueball with a mass of 2.6 GeV (as predicted by Lattice-QCD simulations) and we compute the two- ... See full document

... In order to investigate flavour breaking effects, we compare effective pseudoscalar masses, obtained from correlation functions with different combinations of twisted and standard Wilson quark propagators, on our ... See full document

... As shown in Table 1, see the χ 2 d . o . f , the lattice data are well described by the SU(3) UChPT model. The extrapolated phase shifts, as Fig. 1 shows, agree with the experiment for the Wilson15 and ... See full document

... In this proceedings I will describe recent progress in determining the role of gluonic excitations in the spectrum of mesons and baryons using a first-principles numerical approach to QCD known as lattice ... See full document

... different lattice irreps should ...finer lattice spacings and so with increasing computation cost; this is not practical with currently available ...the lattice discretisation and which are physical ... See full document

... isoscalar meson mass spectrum and study the hidden-flavor composition of the states using lattice QCD ...requires lattice gauge configurations with dynamical light and strange quarks in order ... See full document

... the B meson decay constant obtained using the temporal axial current to that obtained using the pseudoscalar density, plotted against the square of the lattice ...using lattice ... See full document

... 1. The impact of the spectral density can be trivially inferred from existing knowledge due to perturbation theory. Equation (5) already takes into account that in this di ff erence the contributions of strange sea ... See full document

... and QCD parameters emerging upon evaluation of correlation functions of appropriate interpolating operators at both the hadronic level and the QCD level by insertion of complete sets of hadron states, ... See full document

... our lattice results that this is the case. Thus we shall use our lattice results for the reduced width, evaluated where no decays are allowed, to compare with ex- periment and to make ...fixed ... See full document

... exclusive decay of is calculated by QCD factorization (QCDF) method and final state interaction ...the decay is calculated via QCDF ...the decay. For this decay, ̅ via the exchange of ... See full document