Výsledky vyhledávání - "Freeland, E. D."

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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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Short-distance matrix elements for $D^0$-meson mixing for $N_f=2+1$ lattice QCD

Publikováno v: Phys. Rev. D 97, 034513 (2018)

We calculate in three-flavor lattice QCD the short-distance hadronic matrix elements of all five $\Delta C=2$ four-fermion operators that contribute to neutral $D$-meson mixing both in and beyond the Standard Model. We use the MILC Collaboration's $N

Externí odkaz: http://arxiv.org/abs/1706.04622

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Decay constants $f_B$ and $f_{B_s}$ and quark masses $m_b$ and $m_c$ from HISQ simulations

We present a progress report on our calculation of the decay constants $f_B$ and $f_{B_s}$ from lattice-QCD simulations with highly-improved staggered quarks. Simulations are carried out with several heavy valence-quark masses on $(2+1+1)$-flavor ens

Externí odkaz: http://arxiv.org/abs/1611.07411

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Kaon semileptonic decays with $N_f=2+1+1$ HISQ fermions and physical light-quark masses

We discuss the reduction of errors in the calculation of the form factor $f_+^{K \pi}(0)$ with HISQ fermions on the $N_f=2+1+1$ MILC configurations from increased statistics on some key ensembles, new data on ensembles with lattice spacings down to 0

Externí odkaz: http://arxiv.org/abs/1611.04118

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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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Decay constants $f_B$ and $f_{B_s}$ from HISQ simulations

We give a progress report on a project aimed at a high-precision calculation of the decay constants $f_B$ and $f_{B_s}$ from simulations with HISQ heavy and light valence and sea quarks. Calculations are carried out with several heavy valence-quark m

Externí odkaz: http://arxiv.org/abs/1511.02294

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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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