$|V_{cb}|$ using lattice QCD

@article{Wingate2017V\_cbUL,
  title={\$|V\_\{cb\}|\$ using lattice QCD},
  author={Matthew Wingate},
  journal={arXiv: High Energy Physics - Lattice},
  year={2017}
}
  • M. Wingate
  • Published 3 April 2017
  • Physics
  • arXiv: High Energy Physics - Lattice
Lattice QCD calculations of hadronic matrix elements allow one to draw inferences about quark flavor interactions from measurements of hadron decays. Within the context of the Standard Model, the magnitude of the charm-bottom quark coupling $V_{cb}$ can be determined from semileptonic decays such as $B\to D^{(*)}\ell\nu$. This brief review summarizes the present status and short-term outlook for determining $|V_{cb}|$ using lattice QCD. 
View PDF on arXiv

Figures from this paper

References

SHOWING 1-10 OF 20 REFERENCES

Λb → pℓ¯ν¯ℓ and Λb → Λcℓ¯ν¯ℓ form factors from lattice QCD with relativistic heavy quarks

Measurements of the $\Lambda_b \to p \ell^- \bar{\nu}_\ell$ and $\Lambda_b \to \Lambda_c \ell^- \bar{\nu}_\ell$ decay rates can be used to determine the magnitudes of the CKM matrix elements $V_{ub}$…

Form factors for semi-leptonic $B$ decays

Semi-leptonic $B$ decays provide promising channels to test the Standard Model, search for signs of new physics, or determine fundamental parameters like CKM matrix elements. We present an update on…

B →d ν form factors at nonzero recoil and |Vcb | from 2+1 -flavor lattice QCD

We present the first unquenched lattice-QCD calculation of the hadronic form factors for the exclusive decay $\overline{B}\ensuremath{\rightarrow}D\ensuremath{\ell}\overline{\ensuremath{\nu}}$ at…

$B_{(s)}\to D_{(s)}$ semileptonic decays with NRQCD-HISQ valence quarks

We present a calculation of the form factors, $f_0$ and $f_+$, for the $B_{(s)} \to D_{(s)}$ semileptonic decays. Our work uses the MILC $n_f=2+1$ AsqTad configurations with NRQCD and HISQ valence…

$B_c$ decays from highly improved staggered quarks and NRQCD

We calculate semileptonic form factors for the decays $B_c \to \eta_c \, l \nu$ and $B_c \to J/\psi \, l \nu$ over the entire $q^2$ range, using a highly improved lattice quark action for charm at…

$B \rightarrow D l \nu$ form factors at nonzero recoil and extraction of $|V_{cb}|$

We present a lattice QCD calculation of the $B \rightarrow D l \nu$ semileptonic decay form factors $f_+(q^2)$ and $f_0(q^2)$ for the entire physical $q^2$ range. Non-relativistic QCD (NRQCD) bottom…

Determination of the quark coupling strength $|V_{ub}|$ using baryonic decays

The accurate determination of quark mixing parameters is essential for the understanding of the Standard Model. The LHCb collaboration now reports the coupling strength of the b quark to the u quark…

Averages of b-hadron, c-hadron, and $$\tau $$τ-lepton properties as of summer 2016

This article reports world averages of measurements of b-hadron, c-hadron, and $$\tau $$τ-lepton properties obtained by the Heavy Flavor Averaging Group using results available through summer 2016.…

Precision determination of the Cabibbo-Kobayashi-Maskawa element V(cb).

We extract the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element V(c)} and the most relevant parameters of the heavy quark expansion from data of inclusive semileptonic B decays. Our…

Refining new-physics searches in B→Dτν with lattice QCD.

This result is the first standard-model calculation of R(D) from ab initio full QCD and is consistent with, but approximately 1σ higher than, previous estimates for phenomenologically relevant values of the scalar coupling in the type-II model.