Related papers: $V_{cs}$ determination from $D \to{}K \ell \nu$

Improvement of heavy-heavy current for calculation of $\bar{B}\to D^{(*)}\ell\bar{\nu}$ form factors using Oktay-Kronfeld heavy quarks

The CKM matrix element $|V_{cb}|$ can be extracted by combining data from experiments with lattice QCD results for the semileptonic form factors for the $\bar{B}\to D^{(*)} \ell \bar{\nu}$ decays. The Oktay-Kronfeld (OK) action was designed…

High Energy Physics - Lattice · Physics 2018-04-18 Jon A. Bailey , Yong-Chull Jang , Weonjong Lee , Jaehoon Leem

Lattice Study of Semi-Leptonic $B$ Decays: I. $\bar B\to D\ell\bar\nu$ Decays

We present a study of semi-leptonic $\bar B\tp D\ell\bar\nu$ decays in quenched lattice QCD through a calculation of the matrix element $\la D|\bar c\gamma_\mu b|\bar B\ra$ on a $24^3\times 48$ lattice at $\beta=6.2$, using an…

High Energy Physics - Phenomenology · Physics 2009-10-09 K. C. Bowler

Exclusive semileptonic $B \to \pi \ell \nu_\ell$ and $B_s \to K \ell \nu_\ell$ decays through unitarity and lattice QCD

The Cabibbo-Kobayashi-Maskawa (CKM) matrix element $\vert V_{ub}\vert$ is obtained from exclusive semileptonic $B \to \pi \ell \nu_\ell$ and $B_s \to K \ell \nu_\ell$ decays adopting the unitarity-based dispersion matrix approach for the…

High Energy Physics - Phenomenology · Physics 2022-08-24 G. Martinelli , S. Simula , L. Vittorio

Updates on the determination of $\vert V_{cb} \vert$, $R(D^{*})$ and $\vert V_{ub} \vert/\vert V_{cb} \vert$

We present an updated determination of the values of $\vert V_{cb} \vert$, $R(D^*)$ and $\vert V_{ub} \vert/\vert V_{cb} \vert$ based on the new data on semileptonic $B \to D^* \ell \nu_\ell$ decays by the Belle and Belle-II Collaborations…

High Energy Physics - Phenomenology · Physics 2024-03-26 G. Martinelli , S. Simula , L. Vittorio

Extraction of $|V_{cb}|$ from two-body hadronic B decays

We propose a method of extracting the Cabibbo-Kobayashi-Maskawa matrix element $|V_{cb}|$ from two-body hadronic decay processes of $B\to DK$ with precisely determined form factors of $B$ meson semi-leptonic decays. The amplitude…

High Energy Physics - Phenomenology · Physics 2019-12-06 Noriaki Kitazawa , Kyo-suke Masukawa , Yuki Sakai

$\rho$ Polarization and `Model Independent' Extraction of $|V_{ub}|/|V_{cd}|$ from $D\to\rho\ell\nu$ and $B\to\rho\ell\nu$

We briefly discuss the predictions of the heavy quark effective theory for the semileptonic decays of a heavy pseudoscalar to a light one, or to a light vector meson. We point out that measurement of combinations of differential helicity…

High Energy Physics - Phenomenology · Physics 2014-11-17 Winston Roberts

Form factors for $B$ to $Kll$ semileptonic decay from three-flavor lattice QCD

We study the $B \to Kl^+l^-$ semileptonic decay process in three-flavor lattice QCD. We analyze several ensembles generated by the MILC collaboration at different lattice spacings and sea-quark masses. We use the asqtad improved staggered…

High Energy Physics - Lattice · Physics 2011-11-14 Ran Zhou , Jon A. Bailey , Alexei Bazavov , Aida X. El-Khadra , Steven Gottlieb , Rajendra D. Jain , Andreas S. Kronfeld , Ruth S. Van de Water , Fermilab Lattice , MILC Collaborations

Exclusive B-meson semileptonic decays from unitarity and lattice QCD

We examine the semileptonic $B \to D^{(*)} \ell \nu_\ell$ and $B \to \pi \ell \nu_\ell$ decays adopting the unitarity-based Dispersive Matrix (DM) method, which allows to determine the shape of the relevant hadronic form factors (FFs) in…

High Energy Physics - Phenomenology · Physics 2022-03-31 G. Martinelli , M. Naviglio , S. Simula , L. Vittorio

Measurement of the form factors of the decay B0 -> D*- ell+ nu and determination of the CKM matrix element |Vcb|

This article describes a determination of the Cabibbo-Kobayashi-Maskawa matrix element $|V_{cb}|$ from the decay $B^0\to D^{*-}\ell^+\nu_\ell$ using 711 fb$^{-1}$ of Belle data collected near the $\Upsilon(4S)$ resonance. We simultaneously…

High Energy Physics - Experiment · Physics 2011-02-02 W. ~Dungel , C. ~Schwanda , I. ~Adachi , H. ~Aihara , T. ~Aushev , T. ~Aziz , A. ~M. ~Bakich , V. ~Balagura , E. ~Barberio , M. ~Bischofberger , A. ~Bozek , M. ~Bračko , T. ~E. ~Browder , P. ~Chang , Y. ~Chao , A. ~Chen , P. ~Chen , B. ~G. ~Cheon , R. ~Chistov , I. -S. ~Cho , K. ~Cho , K. -S. ~Choi , Y. ~Choi , J. ~Dalseno , A. ~Drutskoy , S. ~Eidelman , H. ~Ha , J. ~Haba , H. ~Hayashii , Y. ~Horii , Y. ~Hoshi , W. -S. ~Hou , T. ~Iijima , K. ~Inami , M. ~Iwabuchi , Y. ~Iwasaki , N. ~J. ~Joshi , T. ~Julius , J. ~H. ~Kang , T. ~Kawasaki , H. ~J. ~Kim , H. ~O. ~Kim , J. ~H. ~Kim , M. ~J. ~Kim , Y. ~J. ~Kim , K. ~Kinoshita , B. ~R. ~Ko , P. ~Krokovny , T. ~Kuhr , T. ~Kumita , A. ~Kuzmin , Y. -J. ~Kwon , S. -H. ~Kyeong , M. ~J. ~Lee , S. -H. ~Lee , J. ~Li , A. ~Limosani , C. ~Liu , Y. ~Liu , D. ~Liventsev , R. ~Louvot , A. ~Matyja , S. ~McOnie , H. ~Miyata , R. ~Mizuk , G. ~B. ~Mohanty , T. ~Mori , E. ~Nakano , M. ~Nakao , Z. ~Natkaniec , S. ~Neubauer , S. ~Nishida , O. ~Nitoh , T. ~Nozaki , T. ~Ohshima , S. ~Okuno , S. ~L. ~Olsen , G. ~Pakhlova , C. ~W. ~Park , H. ~Park , H. ~K. ~Park , M. ~Petrič , L. ~E. ~Piilonen , M. ~Prim , M. ~Röhrken , M. ~Rozanska , S. ~Ryu , H. ~Sahoo , K. ~Sakai , Y. ~Sakai , O. ~Schneider , A. ~J. ~Schwartz , K. ~Senyo , M. ~E. ~Sevior , J. -G. ~Shiu , J. ~B. ~Singh , P. ~Smerkol , A. ~Sokolov , S. ~Stanič , M. ~Starič , T. ~Sumiyoshi , S. ~Suzuki , S. ~Tanaka , G. ~N. ~Taylor , Y. ~Teramoto , K. ~Trabelsi , S. ~Uehara , T. ~Uglov , Y. ~Unno , S. ~Uno , P. ~Urquijo , G. ~Varner , K. ~E. ~Varvell , K. ~Vervink , C. ~H. ~Wang , P. ~Wang , M. ~Watanabe , Y. ~Watanabe , R. ~Wedd , K. ~M. ~Williams , E. ~Won , Y. ~Yamashita , D. ~Zander , Z. ~P. ~Zhang , P. ~Zhou , V. ~Zhulanov , T. ~Zivko

Semileptonic $B_{q}\to D^{\ast}_{q}l\nu $ $(q=s, d, u)$ transitions in QCD

The form factors relevant to $B_{q}\to D^{\ast}_{q}(J^{P}=1^{-})\ell\nu$ $(q=s, d, u)$ decays are calculated in the framework of the three point QCD sum rules approach. The heavy quark effective theory prediction of the form factors are…

High Energy Physics - Phenomenology · Physics 2009-11-13 M. Bayar , K. Azizi

Form factors of $B\to\pi\ell\nu$ and a determination of $|V_{ub}|$ with M\"{o}bius domain-wall-fermions

Using a fully relativistic lattice fermion action, we compute the form factors of the semileptonic decay $B\to\pi\ell\nu$, which is required for the determination of the Cabibbo-Kobayashi-Maskawa matrix element $|V_{ub}|$. We employ the…

High Energy Physics - Lattice · Physics 2023-01-03 Brian Colquhoun , Shoji Hashimoto , Takashi Kaneko , Jonna Koponen

Exclusive determinations of $\vert V_{cb} \vert$ and $R(D^{*})$ through unitarity

In this work we apply the Dispersive Matrix (DM) method of Refs. [1,2] to the lattice computations of the Form Factors (FFs) entering the semileptonic $B \to D^* \ell \nu_\ell$ decays, recently produced by the FNAL/MILC Collaborations [3]…

High Energy Physics - Phenomenology · Physics 2022-12-21 G. Martinelli , S. Simula , L. Vittorio

Semileptonic decays of $D$ mesons in unquenched lattice QCD

We present our preliminary results for semileptonic form factors of $D$ mesons in unquenched lattice QCD. Simulations are carried out with $n_f=2+1$ dynamical quarks using gauge configurations generated by the MILC collaboration. For the…

High Energy Physics - Lattice · Physics 2009-11-10 Masataka Okamoto , Massimo di Pierro , Aida X. El-Khadra , Steven Gottlieb , Andreas S. Kronfeld , Paul B. Mackenzie , Damian P. Menscher , Mehmet B. Oktay , James N. Simone

Measurements of the Semileptonic Decays $\Bb\to D\ell\nub$ and $\Bb\to D^*\ell\nub$ Using a Global Fit to $D X\ell\nub$ Final States

Semileptonic $\bar{B}$ decays to $DX\ell\bar{\nu}$ ($\ell=e$ or $mu$) are selected by reconstructing $D0\ell$ and $D^+\ell$ combinations from a sample of 230 million $\Upsilon(4S) \to B\bar{B}$ decays recorded with the BaBar detector at the…

High Energy Physics - Experiment · Physics 2010-04-12 The BABAR Collaboration , B. Aubert

Determination of the Branching Fraction for B --> Xc l nu Decays and of |Vcb| from Hadronic-Mass and Lepton-Energy Moments

We determine the inclusive B --> Xc l nu branching fraction, the CKM matrix element |Vcb|, and other heavy-quark parameters from a simultaneous fit to moments of the hadronic-mass and lepton-energy distributions in semileptonic B-meson…

High Energy Physics - Experiment · Physics 2009-09-29 BABAR Collaboration , B. Aubert , R. Barate , D. Boutigny

Lattice calculation of the $D_{s}$ meson radiative form factors over the full kinematical range

We compute the structure-dependent axial and vector form factors for the radiative leptonic decays $D_s\to \ell\nu_\ell\gamma$, where $\ell$ is a charged lepton, as functions of the energy of the photon in the rest frame of the $D_s$ meson.…

High Energy Physics - Lattice · Physics 2023-06-12 R. Frezzotti , G. Gagliardi , V. Lubicz , G. Martinelli , F. Mazzetti , C. T. Sachrajda , F. Sanfilippo , S. Simula , N. Tantalo

K -> pi l nu form factors with staggered quarks

We report on the status of the Fermilab-MILC calculation of the form factor f_+^{K pi}(0), needed to extract the CKM matrix element |V_{us}| from experimental data on K semileptonic decays. The HISQ formulation is used in the simulations…

High Energy Physics - Lattice · Physics 2011-11-09 E. Gamiz , C. DeTar , A. X. El-Khadra , A. S. Kronfeld , P. B. Mackenzie , J. Simone

$B\to D^\ast\ell\nu$ at non-zero recoil

The current status of the lattice-QCD calculations of the form factors of the $B\to D^\ast\ell\nu$ semileptonic decay is reviewed. Particular emphasis is given to the most mature calculation at non-zero recoil coming from the Fermilab…

High Energy Physics - Lattice · Physics 2019-06-11 A. Vaquero , C. DeTar , A. X. El-Khadra , A. S. Kronfeld , J. Laiho , R. S. Van de Water

Semi-leptonic Decays of Heavy Flavours on a Fine Grained Lattice

We present the results of a numerical calculation of semi-leptonic form factors relevant for heavy flavour meson decays into light mesons, at $\beta=6.4$ on a $24^3 \times 60$ lattice, using the Wilson action in the quenched approximation.…

High Energy Physics - Lattice · Physics 2019-08-17 As. Abada , C. R. Allton , Ph. Boucaud , D. B. Carpenter , M. Crisafulli , S. Güsken , P. Hernandez , V. Lubicz , G. Martinelli , O. Pène , C. T. Sachrajda , K. Schilling , G. Siegert , R. Sommer

B- and D-meson semileptonic decays with highly improved staggered quarks

We present results for $B_{(s)}$- and $D_{(s)}$-meson semileptonic decays from ongoing calculations by the Fermilab Lattice and MILC Collaborations. Our calculation employs the highly improved staggered quark (HISQ) action for both sea and…

High Energy Physics - Lattice · Physics 2021-11-10 William I Jay , Andrew Lytle , Carleton DeTar , Aida El-Khadra , Elvira Gamiz , Zechariah Gelzer , Steven Gottlieb , Andreas Kronfeld , Jim Simone , Alejandro Vaquero