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Semileptonic form factors for $B \to D^\ast\ell\nu$ at nonzero recoil from 2 + 1-flavor lattice QCD

Autor: Bazavov, A., DeTar, C. E., Du, Daping, El-Khadra, A. X., Gámiz, E., Gelzer, Z., Gottlieb, Steven, Heller, U. M., Kronfeld, A. S., Laiho, J., Mackenzie, P. B., Simone, J. N., Sugar, R., Toussaint, D., Van de Water, R. S., Vaquero, A.

Publikováno v: Eur. Phys. J. C 82, 1141 (2022)

We present the first unquenched lattice-QCD calculation of the form factors for the decay $B\rightarrow D^\ast\ell\nu$ at nonzero recoil. Our analysis includes 15 MILC ensembles with $N_f=2+1$ flavors of asqtad sea quarks, with a strange quark mass c

Externí odkaz: http://arxiv.org/abs/2105.14019

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$D$ meson Semileptonic Decay Form Factors at $q^2 = 0$

We discuss preliminary results for the vector form factors $f_+^{\{\pi,K\}}$ at zero-momentum transfer for the decays $D\to\pi\ell\nu$ and $D\to K \ell\nu$ using MILC's $N_f = 2+1+1$ HISQ ensembles at four lattice spacings, $a \approx 0.042, 0.06, 0.

Externí odkaz: http://arxiv.org/abs/1901.08989

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$B_s\to K\ell\nu$ decay from lattice QCD

Publikováno v: Phys. Rev. D 100, 034501 (2019)

We use lattice QCD to calculate the form factors $f_+(q^2)$ and $f_0(q^2)$ for the semileptonic decay $B_s\to K\ell\nu$. Our calculation uses six MILC asqtad 2+1 flavor gauge-field ensembles with three lattice spacings. At the smallest and largest la

Externí odkaz: http://arxiv.org/abs/1901.02561

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$|V_{us}|$ from $K_{\ell 3}$ decay and four-flavor lattice QCD

Publikováno v: Phys. Rev. D 99, 114509 (2019)

Using HISQ $N_f=2+1+1$ MILC ensembles with five different values of the lattice spacing, including four ensembles with physical quark masses, we have performed the most precise computation to date of the $K\to\pi\ell\nu$ vector form factor at zero mo

Externí odkaz: http://arxiv.org/abs/1809.02827

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$B_s \to K \ell\nu$ form factors with 2+1 flavors

Publikováno v: EPJ Web of Conferences 175, 13008 (2018)

Using the MILC 2+1 flavor asqtad quark action ensembles, we are calculating the form factors $f_0$ and $f_+$ for the semileptonic $B_s \rightarrow K \ell\nu$ decay. A total of six ensembles with lattice spacing from $\approx0.12$ to 0.06 fm are being

Externí odkaz: http://arxiv.org/abs/1711.08085

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$B^0_{(s)}$-mixing matrix elements from lattice QCD for the Standard Model and beyond

Publikováno v: Phys. Rev. D 93, 113016 (2016)

We calculate---for the first time in three-flavor lattice QCD---the hadronic matrix elements of all five local operators that contribute to neutral $B^0$- and $B_s$-meson mixing in and beyond the Standard Model. We present a complete error budget for

Externí odkaz: http://arxiv.org/abs/1602.03560

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Phenomenology of semileptonic B-meson decays with form factors from lattice QCD

Autor: Du, Daping, El-Khadra, A. X., Gottlieb, Steven, Kronfeld, A. S., Laiho, J., Lunghi, E., Van de Water, R. S., Zhou, Ran

Publikováno v: Phys. Rev. D 93, 034005 (2016)

We study the exclusive semileptonic $B$-meson decays $B\to K(\pi)\ell^+\ell^-$, $B\to K(\pi)\nu\bar\nu$, and $B\to\pi\tau\nu$, computing observables in the Standard model using the recent lattice-QCD results for the underlying form factors from the F

Externí odkaz: http://arxiv.org/abs/1510.02349

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$B\to Kl^+l^-$ decay form factors from three-flavor lattice QCD

Publikováno v: Phys. Rev. D 93, 025026 (2016)

We compute the form factors for the $B \to Kl^+l^-$ semileptonic decay process in lattice QCD using gauge-field ensembles with 2+1 flavors of sea quark, generated by the MILC Collaboration. The ensembles span lattice spacings from 0.12 to 0.045 fm an

Externí odkaz: http://arxiv.org/abs/1509.06235

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$B\to\pi\ell\ell$ form factors for new-physics searches from lattice QCD

Publikováno v: Phys. Rev. Lett. 115, 152002 (2015)

The rare decay $B\to\pi\ell^+\ell^-$ arises from $b\to d$ flavor-changing neutral currents and could be sensitive to physics beyond the Standard Model. Here, we present the first $ab$-$initio$ QCD calculation of the $B\to\pi$ tensor form factor $f_T$

Externí odkaz: http://arxiv.org/abs/1507.01618

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$|V_{ub}|$ from $B\to\pi\ell\nu$ decays and (2+1)-flavor lattice QCD

Publikováno v: Phys. Rev. D 92, 014024 (2015)

We present a lattice-QCD calculation of the $B\to\pi\ell\nu$ semileptonic form factors and a new determination of the CKM matrix element $|V_{ub}|$. We use the MILC asqtad 2+1-flavor lattice configurations at four lattice spacings and light-quark mas

Externí odkaz: http://arxiv.org/abs/1503.07839

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