Lattice QCD calculation of $\bar{B}\to Dl\barν$ decay form factors at zero recoil

Details Lattice QCD calculation of $\bar{B}\to Dl\barν$ decay form factors at zero recoil Lattice QCD calculation of $\bar{B}\to Dl\barν$ decay form factors at zero recoil

1999-06-15

arxiv.org/abs/hep-ph/9906376v2

Phys.Rev.D61:014502,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

32 pp, 10 figs; final, published version

Scientific paper

10.1103/PhysRevD.61.014502

A lattice QCD calculation of the $\bar{B}\to Dl\bar{\nu}$ 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 a ratio of correlation functions in which the bulk of the uncertainties cancels. The other form factor $h_-(w)$ is calculated, for small recoil momenta, from a similar ratio. In both cases, the heavy quark mass dependence is observed through direct calculations with several combinations of initial and final heavy quark masses. Our results are $h_+(1) = 1.007(6)(2)(3)$ and $h_-(1)=-0.107(28)(04)(^{10}_{30})$. For both the first error is statistical, the second stems from the uncertainty in adjusting the heavy quark masses, and the last from omitted radiative corrections. Combining these results, we obtain a precise determination of the physical combination $F_{B\to D}(1)=1.058(^{20}_{17})$, where the mentioned systematic errors are added in quadrature. The dependence on lattice spacing and the effect of quenching are not yet included, but with our method they should be a fraction of $F_{B\to D}-1$.

Affiliated with

Also associated with

No associations

Rating

Lattice QCD calculation of $\bar{B}\to Dl\barν$ decay form factors at zero recoil does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Lattice QCD calculation of $\bar{B}\to Dl\barν$ decay form factors at zero recoil, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lattice QCD calculation of $\bar{B}\to Dl\barν$ decay form factors at zero recoil will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-383738