Related papers: B -> D* l nu with 2+1 flavors

$D$ to $K$ semileptonic decay form factors from HISQ light and charm quarks

We present a study of $D \rightarrow K, l \nu$ semileptonic decays on the lattice which employs the HISQ action for both the charm and the light quarks. We work with MILC unquenched $N_f = 2 + 1$ lattices and determine the scalar form…

High Energy Physics - Lattice · Physics 2011-03-29 H. Na , C. T. H. Davies , E. Follana , P. Lepage , J. Shigemitsu

Factorization, resummation and sum rules for heavy-to-light form factors

Precision calculations of heavy-to-light form factors are essential to sharpen our understanding towards the strong interaction dynamics of the heavy-quark system and to shed light on a coherent solution of flavor anomalies. We briefly…

High Energy Physics - Phenomenology · Physics 2016-12-21 Yu-Ming Wang

Lattice QCD form factor for $B_s\to D_s^* l\nu$ at zero recoil with non-perturbative current renormalisation

We present details of a lattice QCD calculation of the $B_s\to D_s^*$ axial form factor at zero recoil using the Highly Improved Staggered Quark (HISQ) formalism on the second generation MILC gluon ensembles that include up, down, strange…

High Energy Physics - Lattice · Physics 2020-05-11 E. McLean , C. T. H. Davies , A. T. Lytle , J. Koponen

Shedding New Light on ${\cal R} (D_{(s)}^{(\ast)} )$ and $|V_{cb}|$ from Semileptonic $\bar B_{(s)} \to D_{(s)}^{(\ast)} \ell \bar {\nu}_{\ell}$ Decays

We compute for the first time the next-to-leading-order QCD corrections to the $\bar B_{(s)} \to D_{(s)}^{(\ast)}$ form factors at large hadronic recoil. Both the charm-quark-mass and the strange-quark-mass dependent pieces can generate the…

High Energy Physics - Phenomenology · Physics 2023-08-23 Bo-Yan Cui , Yong-Kang Huang , Yu-Ming Wang , Xue-Chen Zhao

Analytic two-loop virtual corrections to $b --> d l^+ l^-$

We compute the two-loop virtual corrections to the flavour changing neutral current process $b --> d l^+ l^-$. As calculation techniques integration by parts identities and the method of differential equations are used. The result is…

High Energy Physics - Phenomenology · Physics 2009-11-10 Dirk Seidel

Meson Electro-Magnetic Form Factors in an Extended Nambu--Jona-Lasinio model including Heavy Quark Flavors

Based on an extended NJL model including heavy quark flavors, we calculate the form factors of pseudo-scalar and vector mesons. After take into account of the vector-meson-dominance effect which introduce a form factor correction to the…

High Energy Physics - Phenomenology · Physics 2015-09-24 Yi-Long Luan , Xiao-Lin Chen , Wei-Zhen Deng

Nucleon and flavor form factors in a light front quark model in AdS/QCD

Using the light front wave functions for the nucleons in a quark model in AdS/QCD, we calculate the nucleon electromagnetic form factors. The flavor decompositions of the nucleon form factors are calculated from the GPDs in this model. We…

High Energy Physics - Phenomenology · Physics 2014-01-07 Dipankar Chakrabarti , Chandan Mondal

Update on a short-distance D^0-meson mixing calculation with $N_f=2+1$ flavors

We present an update on our calculation of the short-distance $D^0$-meson mixing hadronic matrix elements. The analysis is performed on the MILC collaboration's $N_f=2+1$ asqtad configurations. We use asqtad light valence quarks and the…

High Energy Physics - Lattice · Physics 2014-12-16 C. C. Chang , C. Bernard , C. M. Bouchard , A. X. El-Khadra , E. D. Freeland , E. Gámiz , A. S. Kronfeld , J. Laiho , R. S. Van de Water

Parametrisations of the D -> K l nu form factor and the determination of \hat{g}

The vector form factor f_+(t) of the semileptonic decay D -> K l nu, measured recently with a high accuracy, can be used to determine the strong coupling constant g_{D_s^* D K}. The latter is related to the normalised coupling \hat{g}…

High Energy Physics - Phenomenology · Physics 2008-11-26 Sébastien Descotes-Genon , Alain Le Yaouanc

Lattice calculation of the zero-recoil form factor of anti-B --> D* lepton anti-neutrino: toward a model independent determination of |V(cb)|

We develop a new method in lattice QCD to calculate the form factor F(1) at zero recoil. This is the main theoretical ingredient needed to determine |V(cb)| from the exclusive decay anti-B --> D* lepton anti-neutrino. We introduce three…

High Energy Physics - Phenomenology · Physics 2014-11-17 Shoji Hashimoto , Andreas S. Kronfeld , Paul B. Mackenzie , Sinead M. Ryan , James N. Simone

Full result for the QCD equation of state with 2+1 flavors

We present a full result for the 2+1 flavor QCD equation of state. All the systematics are controlled, the quark masses are set to their physical values, and the continuum extrapolation is carried out. This extends our previous studies…

High Energy Physics - Lattice · Physics 2014-02-18 Szabocls Borsanyi , Zoltan Fodor , Christian Hoelbling , Sandor D. Katz , Stefan Krieg , Kalman K. Szabo

Tuning Fermilab Heavy Quarks in 2+1 Flavor Lattice QCD with Application to Hyperfine Splittings

We report the non-perturbative tuning of parameters--- kappa_c, kappa_b, and kappa_crit ---that determine the heavy-quark mass in the Fermilab action. This requires the computation of the masses of Ds^(*) and Bs^(*) mesons comprised of a…

High Energy Physics - Lattice · Physics 2011-03-23 C. Bernard , C. DeTar , M. Di Pierro , A. X. El-Khadra , R. T. Evans , E. D. Freeland , E. Gámiz , Steven Gottlieb , U. M. Heller , J. E. Hetrick , A. S. Kronfeld , J. Laiho , L. Levkova , P. B. Mackenzie , J. N. Simone , R. Sugar , D. Toussaint , R. S. Van de Water

Weak decays of doubly heavy baryons: the FCNC processes

The discovery of doubly heavy baryon provides us with a new platform for precisely testing Standard Model and searching for new physics. As a continuation of our previous works, we investigate the FCNC processes of doubly heavy baryons.…

High Energy Physics - Phenomenology · Physics 2018-09-12 Zhi-Peng Xing , Zhen-Xing Zhao

Improved Analysis of B->pi e nu from QCD Sum Rules on the Light-Cone

We present a new calculation of the B->pi form-factor f_+, relevant for the measurement of |V_{ub}| from semileptonic B->pi transitions, from QCD sum rules on the light-cone. The new element is the calculation of radiative corrections to…

High Energy Physics - Phenomenology · Physics 2010-02-03 Patricia Ball , Roman Zwicky

$B_{(s)}\to D_{(s)}$ 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 quarks at four values of the momentum…

High Energy Physics - Lattice · Physics 2016-12-05 Christopher J. Monahan , Heechang Na , Chris M. Bouchard , G. Peter Lepage , Junko Shigemitsu

B- and D-meson decay constants from three-flavor lattice QCD

We calculate the leptonic decay constants of B_{(s)} and D_{(s)} mesons in lattice QCD using staggered light quarks and Fermilab bottom and charm quarks. We compute the heavy-light meson correlation functions on the MILC asqtad-improved…

High Energy Physics - Lattice · Physics 2013-10-22 A. Bazavov , C. Bernard , C. M. Bouchard , C. DeTar , M. Di Pierro , A. X. El-Khadra , R. T. Evans , E. D. Freeland , E. Gamiz , Steven Gottlieb , U. M. Heller , J. E. Hetrick , R. Jain , A. S. Kronfeld , J. Laiho , L. Levkova , P. B. Mackenzie , E. T. Neil , M. B. Oktay , J. N. Simone , R. Sugar , D. Toussaint , R. S. Van de Water

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

The $D_s$, $D^+$, $B_s$ and $B$ decay constants from $2+1$ flavor lattice QCD

We present a study of the $D$ and $B$ leptonic decay constants on the MILC $N_f=2+1$ asqtad gauge ensembles using asqtad-improved staggered light quarks and clover heavy quarks in the Fermilab interpretation. Our previous analysis…

High Energy Physics - Lattice · Physics 2014-03-28 A. Bazavov , C. Bernard , C. Bouchard , C. DeTar , D. Du , A. X. El-Khadra , J. Foley , E. D. Freeland , E. Gámiz , Steven Gottlieb , U. M. Heller , J. Kim , J. Komijani , A. S. Kronfeld , J. Laiho , L. Levkova , P. B. Mackenzie , D. Mohler , E. T. Neil , M. B. Oktay , S. Qiu , J. N. Simone , R. L. Sugar , D. Toussaint , R. S. Van de Water , R. Zhou

Comment on form factor shape and extraction of |V_ub| from B --> pi l nu

We point out that current experimental data for partial B --> pi l nu branching fractions reduce the theoretical input required for a precise extraction of |V_ub| to the form factor normalization at a single value of the pion energy. We…

High Energy Physics - Phenomenology · Physics 2010-04-05 Thomas Becher , Richard J. Hill

Semileptonic $B$-meson decays to light pseudoscalar mesons on the HISQ ensembles

We report the status of an ongoing lattice-QCD calculation of form factors for exclusive semileptonic decays of $B$ mesons with both charged currents ($B\to\pi\ell\nu$, $B_s\to K\ell\nu$) and neutral currents ($B\to\pi\ell^+\ell^-$, $B\to…

High Energy Physics - Lattice · Physics 2018-04-18 Zechariah Gelzer , C. Bernard , C. DeTar , A. X. El-Khadra , E. Gámiz , Steven Gottlieb , Andreas S. Kronfeld , Yuzhi Liu , Y. Meurice , J. N. Simone , D. Toussaint , R. S. Van de Water , R. Zhou