Related papers: Revisiting $B\to D \ell \nu$

Lattice $B \to D^{(*)}$ form factors, $R(D^{(*)})$, and $|V_{cb}|$

I discuss recent progress in lattice calculations of $B \to D^{(*)} \ell \nu$ form factors, important for the precision determination of $|V_{cb}|$ in the Standard Model (SM), and for testing SM expectations of lepton flavor universality in…

High Energy Physics - Lattice · Physics 2020-04-22 Andrew Lytle

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

B -> D l nu form factors and the determination of |Vcb|

The zero recoil limit of the B -> D l nu form factors is calculated on the lattice, which provides a model-independent determination of |Vcb|. Considering a ratio of form factors, in which the bulk of statistical and systematic errors…

High Energy Physics - Lattice · Physics 2009-10-31 S. Hashimoto , A. X. El-Khadra , A. S. Kronfeld , P. B. Mackenzie , S. M. Ryan , J. N. Simone

$B\to D^{(\ast)}\ell\nu$ at non-zero recoil

$B$ anomalies play a prominent role in Beyond the Standard Model (BSM) physics searches. In particular, the long standing tension between the inclusive and the exclusive determinations of the CKM matrix element $|V_{cb}|$ and the current…

High Energy Physics - Lattice · Physics 2022-12-21 Alejandro Vaquero

$B_s \to D_s \ell \nu$ Form Factors and the Fragmentation Fraction Ratio $f_s/f_d$

We present a lattice quantum chromodynamics determination of the scalar and vector form factors for the $B_s \rightarrow D_s \ell \nu$ decay over the full physical range of momentum transfer. In conjunction with future experimental data,…

High Energy Physics - Lattice · Physics 2017-06-21 Christopher J Monahan , Heechang Na , Chris M Bouchard , G Peter Lepage , Junko Shigemitsu

$R(D^*)$, $|V_{cb}|$, and the Heavy Quark Symmetry relations between form factors

Stringent relations between the $B^{(*)} \to D^{(*)} $ form factors exist in the heavy quark limit and the leading symmetry breaking corrections are known. We reconsider their uncertainty and role in the analysis of recent Belle data for…

High Energy Physics - Phenomenology · Physics 2017-12-06 Dante Bigi , Paolo Gambino , Stefan Schacht

$B \to \rho \ell \nu_\ell$ Form Factors

The bounds on the form factors for $B \to \rho \ell \nu_\ell$ decay are studied. Constrained by lattice data and a constrained conformal mapping, the more informations can be obtained for $A_1(q^2)$ form-factor which dominates the decay…

High Energy Physics - Phenomenology · Physics 2016-08-24 Damir Becirevic

$B\to D \ell \nu_\ell$ form factors beyond leading power and extraction of $|V_{cb}|$ and $R(D)$

We investigate the subleading-power corrections to the exclusive $B\to D \ell \nu_\ell$ form factors at ${\cal O} (\alpha_s^0)$ in the light-cone sum rules (LCSR) framework by including the two- and three-particle higher-twist contributions…

High Energy Physics - Phenomenology · Physics 2022-05-25 Jing Gao , Tobias Huber , Yao Ji , Chao Wang , Yu-Ming Wang , Yan-Bing Wei

New parametrization of the form factors in $\bar{B}\to D\ell\bar{\nu}_\ell$ decays

A new model-independent parametrization is proposed for the hadronic form factors in the semileptonic $\bar{B}\to D\ell\bar{\nu}_\ell$ decay. By a combined consideration of the recent experimental and lattice QCD data, we determine…

High Energy Physics - Phenomenology · Physics 2020-02-14 De-Liang Yao , Pedro Fernandez-Soler , Feng-Kun Guo , Juan Nieves

A fresh look at the determination of |V_cb| from B-> D^* l nu

We use recent Belle results on $\bar{B}^0\rightarrow D^{*+}l^-\bar{\nu}_l$ decays to extract the CKM element $|V_{cb}|$ with two different but well-founded parameterizations of the form factors. We show that the CLN and BGL…

High Energy Physics - Phenomenology · Physics 2017-04-27 Dante Bigi , Paolo Gambino , Stefan Schacht

Unitarity constraints and the dispersive matrix

We present updated estimates of $\vert V_{cb} \vert$ and $R(D^{(*)})$ based on all the available theoretical and experimental data on semileptonic $B \to D^{(*)} \ell \nu_\ell$ decays. These values have been obtained by using the Dispersive…

High Energy Physics - Phenomenology · Physics 2024-04-02 Guido Martinelli , Silvano Simula , Ludovico Vittorio

$B\!\to\!D^{(*)}\ell\nu$ semileptonic decays in lattice QCD with domain-wall heavy quarks

We calculate the $B \to D^{(*)} \ell \nu$ form factors in 2+1 flavor relativistic lattice QCD by employing the M\"obius domain-wall action for all quark flavors. Our simulations are carried out at lattice cut-offs $a^{-1} \sim 2.5$, 3.6 and…

High Energy Physics - Lattice · Physics 2021-12-28 T. Kaneko , Y. Aoki , B. Colquhoun , M. Faur , H. Fukaya , S. Hashimoto , J. Koponen , E. Kou

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

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

$\vert V_{cb} \vert$ and $R(D^{(*)})$ using lattice QCD and unitarity

The Cabibbo-Kobayashi-Maskawa (CKM) matrix element $|V_{cb}|$ is extracted from exclusive semileptonic $B \to D^{(*)}$ decays adopting a novel unitarity-based approach which allows to determine in a full non-perturbative way the relevant…

High Energy Physics - Phenomenology · Physics 2022-02-16 G. Martinelli , S. Simula , L. Vittorio

Revisiting fits to $B^{0} \to D^{*-} \ell^{+} \nu_{\ell}$ to measure $|V_{cb}|$ with novel methods and preliminary LQCD data at non-zero recoil

We present a study of fits to exclusive $B^{0} \to D^{*-} \ell^{+} \nu_{\ell}$ measurements for the determination of the Cabbibo-Kobayashi-Maskawa matrix element magnitude $|V_{cb}|$, based on the most recent Belle untagged measurement.…

High Energy Physics - Phenomenology · Physics 2021-05-05 Daniel Ferlewicz , Phillip Urquijo , Eiasha Waheed

Measurement of the form factors of the decay B^0 -> D^{*-} l^+ nu_l and determination of the CKM matrix element |V_{cb}|

This paper describes a determination of the Cabibbo-Kobayashi-Maskawa matrix element $|V_{cb}|$ using the decay $B^0\to D^{*-}\ell^+\nu_\ell$. We perform a combined measurement of this quantity and of the form factors $\rho^2$, $R_1(1)$,…

High Energy Physics - Experiment · Physics 2008-10-10 The Belle Collaboration , I. Adachi

New physics search via angular distribution of $B \rightarrow D^* \ell {\nu}_{\ell}$ decay in the light of the new lattice data

In this article, we investigate the potential of the angular distribution of the $B \rightarrow D^* \ell {\nu}_{\ell}$ process to search for new physics signals. The Belle collaboration has analysed it to constraint $V_{cb}$ and the $B\to…

High Energy Physics - Phenomenology · Physics 2024-03-11 Tejhas Kapoor , Zhuo-Ran Huang , Emi Kou

Revisit to the $b\to c\tau\nu$ transition: in and beyond the SM

We perform an analysis of the $b\to c\tau\nu$ data, including $R(D^{(*)})$, $R(J/\psi)$, $P_\tau(D^{*})$ and $F_L^{D^*}$, within and beyond the Standard Model (SM). We fit the $B\to D^{(*)}$ hadronic form factors in the HQET parametrization…

High Energy Physics - Phenomenology · Physics 2021-04-07 Kingman Cheung , Zhuo-Ran Huang , Hua-Dong Li , Cai-Dian Lü , Ying-nan Mao , Ru-Ying Tang

Study of $B\to\pi\ell\nu_{\ell}$ and $B^{+}\to\eta^{(\prime)}\ell^{+}\nu_{\ell}$ decays and determination of $|V_{ub}|$

We reassess the $B\to\pi\ell\nu_{\ell}$ differential branching ratio distribution experimental data released by the BaBar and Belle Collaborations supplemented with all lattice calculations of the $B\to\pi$ form factor shape available up to…

High Energy Physics - Phenomenology · Physics 2018-09-12 Sergi Gonzàlez-Solís , Pere Masjuan