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Akademický článek

Gradient flow and scale setting on MILC HISQ ensembles

Autor: Bazavov, A., Bernard, C., Brown, N., Komijani, J., DeTar, C., Foley, J., Levkova, L., Gottlieb, Steven, Heller, U. M., Laiho, J., Sugar, R. L., Toussaint, D., Van de Water, R. S.

We report on a scale determination with gradient-flow techniques on the N-f = 2 + 1 + 1 highly improved staggered quark ensembles generated by the MILC Collaboration. The ensembles include four lattice spacings, ranging from approximately 0.15 to 0.0

Externí odkaz: http://hdl.handle.net/10150/614949
http://arizona.openrepository.com/arizona/handle/10150/614949

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Lattice computation of the electromagnetic contributions to kaon and pion masses

Autor: Basak, S., Bazavov, A., Bernard, C., DeTar, C., Freeland, E., Gottlieb, Steven, Heller, U. M., Laiho, J., Levkova, L., Osborn, J., Sugar, R. L., Torok, A., Toussaint, D., Van de Water, R. S., Zhou, R.

Publikováno v: Phys. Rev. D 99, 034503 (2019)

We present a lattice calculation of the electromagnetic (EM) effects on the masses of light pseudoscalar mesons. The simulations employ 2+1 dynamical flavors of asqtad QCD quarks, and quenched photons. Lattice spacings vary from $\approx 0.12$ fm to

Externí odkaz: http://arxiv.org/abs/1807.05556

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Electromagnetic effects on the light pseudoscalar mesons and determination of $m_u/m_d$

Autor: MILC Collaboration, Basak, S., Bazavov, A., Bernard, C., DeTar, C., Freeland, E., Foley, J., Gottlieb, Steven, Heller, U. M., Komijani, J., Laiho, J., Levkova, L., Osborn, J., Sugar, R. L., Torok, A., Toussaint, D., Van de Water, R. S., Zhou, R.

The MILC Collaboration has completed production running of electromagnetic effects on light mesons using asqtad improved staggered quarks. In these calculations, we use quenched photons in the noncompact formalism. We study four lattice spacings from

Externí odkaz: http://arxiv.org/abs/1606.01228

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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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Electromagnetic effects on the light hadron spectrum

Autor: MILC Collaboration, Basak, S., Bazavov, A., Bernard, C., DeTar, C., Freeland, E., Foley, J., Gottlieb, Steven, Heller, U. M., Komijani, J., Laiho, J., Levkova, L., Li, R., Osborn, J., Sugar, R. L., Torok, A., Toussaint, D., Van de Water, R. S., Zhou, R.

Publikováno v: S Basak 2015 J. Phys.: Conf. Ser. 640 012052

For some time, the MILC Collaboration has been studying electromagnetic effects on light mesons. These calculations use fully dynamical QCD, but only quenched photons, which suffices to NLO in XPT. That is, the sea quarks are electrically neutral, wh

Externí odkaz: http://arxiv.org/abs/1510.04997

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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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The $B \to D \ell \nu$ form factors at nonzero recoil and $|V_{cb}|$ from $2+1$-flavor lattice QCD

Publikováno v: Phys. Rev. D 92, 034506 (2015)

We present the first unquenched lattice-QCD calculation of the hadronic form factors for the exclusive decay $\overline{B} \rightarrow D \ell \overline{\nu}$ at nonzero recoil. We carry out numerical simulations on fourteen ensembles of gauge-field c

Externí odkaz: http://arxiv.org/abs/1503.07237

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Gradient flow and scale setting on MILC HISQ ensembles

Autor: MILC Collaboration, Bazavov, A., Bernard, C., Brown, N., DeTar, C., Foley, J., Gottlieb, Steven, Heller, U. M., Komijani, J., Laiho, J., Levkova, L., Sugar, R. L., Toussaint, D., Van de Water, R. S.

Publikováno v: Phys. Rev. D 93, 094510 (2016)

We report on a scale determination with gradient-flow techniques on the $N_f=2+1+1$ highly improved staggered quark ensembles generated by the MILC Collaboration. The ensembles include four lattice spacings, ranging from approximately 0.15 to 0.06 fm

Externí odkaz: http://arxiv.org/abs/1503.02769

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