Heavy-Light Semileptonic Decays in Staggered Chiral Perturbation Theory

Autor: Christopher Alan Aubin, Claude Bernard

We calculate the form factors for the semileptonic decays of heavy-light pseudoscalar mesons in partially quenched staggered chiral perturbation theory (\schpt), working to leading order in $1/m_Q$, where $m_Q$ is the heavy quark mass. We take the li

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bda7ac639c4ac64bdadbc161047a284d

Semileptonic Decays ofDMesons in Three-Flavor Lattice QCD

Autor: Massimo Dipierro, D. Menscher, Robert L. Sugar, M. Nobes, James C. Osborn, James Edward Hetrick, Claude Bernard, Howard D. Trottier, Aida X. El-Khadra, Urs M. Heller, Carleton DeTar, James N. Simone, Eric Brittain Gregory, D. Toussaint, Christopher Alan Aubin, Steven Gottlieb, Paul B. Mackenzie, M. Okamoto, M. B. Oktay, Andreas S. Kronfeld

Publikováno v: Physical Review Letters. 94

We present the first three-flavor lattice QCD calculations for $D\to \pi l\nu$ and $D\to K l\nu$ semileptonic decays. Simulations are carried out using ensembles of unquenched gauge fields generated by the MILC collaboration. With an improved stagger

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::548d40ddd97ae78d5c8b7f46bfad8b4b
https://doi.org/10.1103/physrevlett.94.011601

Lattice gauge fixing as quenching and the violation of spectral positivity

Autor: Christopher Alan Aubin, Michael C. Ogilvie

Publikováno v: Physical Review D. 70

Lattice Landau gauge and other related lattice gauge fixing schemes are known to violate spectral positivity. The most direct sign of the violation is the rise of the effective mass as a function of distance. The origin of this phenomenon lies in the

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https://doi.org/10.1103/physrevd.70.074514

High-Precision Lattice QCD Confronts Experiment

Autor: Aida X. El-Khadra, Urs M. Heller, Paul B. Mackenzie, Robert L. Sugar, M. Nobes, T. Burch, James N. Simone, Christopher Alan Aubin, Eric Brittain Gregory, James Edward Hetrick, D. Menscher, Howard D. Trottier, Carleton DeTar, Q. Mason, G. P. Lepage, Junko Shigemitsu, Andreas S. Kronfeld, Christine Davies, Matthew Wingate, E. Follana, Alan Gray, Claude Bernard, Steven Gottlieb, M. Di Pierro, Doug Toussaint, James C. Osborn

Publikováno v: Scopus-Elsevier
T. H. Davies, C, Follana, E, Gray, A, P. Lepage, G, Mason, Q, Nobes, M, Shigemitsu, J, D. Trottier, H, Wingate, M, Aubin, C, Bernard, C, Burch, T, DeTar, C, Gottlieb, S, B. Gregory, E, M. Heller, U, E. Hetrick, J, Osborn, J, Sugar, R, Toussaint, D, Di Pierro, M, El-Khadra, A, S. Kronfeld, A, B. Mackenzie, P, Menscher, D & Simone, J 2003, ' High-Precision Lattice QCD Confronts Experiment ', Physical Review Letters, vol. 92, no. 2 . https://doi.org/10.1103/PhysRevLett.92.022001

We argue that high-precision lattice QCD is now possible, for the first time, because of a new improved staggered quark discretization. We compare a wide variety of nonperturbative calculations in QCD with experiment, and find agreement to within sta

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https://doi.org/10.1103/physrevlett.92.022001