Výsledky vyhledávání - "G. A. LePage"

Properties of low-lying charmonia and bottomonia from lattice QCD + QED

Autor: Jonna Koponen, Ben Galloway, Daniel Hatton, Christine T. H. Davies, G. Peter Lepage, Andrew Lytle

Publikováno v: Suplemento de la Revista Mexicana de Física. 3

The precision of lattice QCD calculations has been steadily improving for some time and is now approaching, or has surpassed, the 1% level for multiple quantities. At this level QED effects, i.e. the fact that quarks carry electric as well as color c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::90d15e839a26ae2eea0674cc37bd9cbe
https://doi.org/10.31349/suplrevmexfis.3.0308018

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Akademický článek

Demographic gaps or preparation gaps?: The large impact of incoming preparation on performance of students in introductory physics

Autor: Shima Salehi, Eric Burkholder, G. Peter Lepage, Steven Pollock, Carl Wieman

Publikováno v: Physical Review Physics Education Research, Vol 15, Iss 2, p 020114 (2019)

We have studied the impact of incoming preparation and demographic variables on student performance on the final exam in the standard introductory calculus-based mechanics course at three different institutions. Multivariable regression analysis was

Externí odkaz: https://doaj.org/article/5b31d7d6450b42b88db2cb9f1be9d75f

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Active learning in a graduate quantum field theory course

Autor: G. Peter Lepage

Publikováno v: American Journal of Physics. 89:317-323

This article describes how the author successfully adapted techniques drawn from the literature on active learning for use in a graduate-level course on quantum field theory. Students completed readings and online questions ahead of each class and sp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbecb4e3f10fc336585b9592074bc591
https://doi.org/10.1119/10.0002349

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Improved

V_{c s}

determination using precise lattice QCD form factors for

D \to K ℓ ν

Autor: Chris Bouchard, Bipasha Chakraborty, W. G. Parrott, J. Koponen, Christine Davies, G. P. Lepage

Publikováno v: Physical Review

We provide a 0.8%-accurate determination of Vcs from combining experimental results for the differential rate of D→K semileptonic decays with precise form factors that we determine from lattice QCD. This is the first time that Vcs has been determin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd4a252e916d26d759e6a7b375706e5b
http://repo.scoap3.org/api

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Determination of m¯b/m¯c and m¯b from nf=4 lattice QCD+QED

Autor: J. Koponen, Christine Davies, D. Hatton, A. T. Lytle, G. P. Lepage

Publikováno v: Physical Review D. 103

We extend HPQCD's earlier ${n}_{f}=2+1+1$ lattice-QCD analysis of the ratio of $\overline{\mathrm{MS}}$ masses of the $b$ and $c$ quark to include results from finer lattices (down to 0.03 fm) and a new calculation of QED contributions to the mass ra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1fba1cff7638da5bb389f0414795c4ad
https://doi.org/10.1103/physrevd.103.114508

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Bottomonium precision tests from full lattice QCD: Hyperfine splitting, ϒ leptonic width, and b quark contribution to e+e−→hadrons

Autor: Christine Davies, J. Koponen, A. T. Lytle, G. P. Lepage, D. Hatton

Publikováno v: Physical Review D. 103

We calculate the mass difference between the $\mathrm{\ensuremath{\Upsilon}}$ and ${\ensuremath{\eta}}_{b}$ and the $\mathrm{\ensuremath{\Upsilon}}$ leptonic width from lattice QCD using the highly improved staggered quark formalism for the $b$ quark

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cb2d93f15d4c3583dcbab27d795c6e72
https://doi.org/10.1103/physrevd.103.054512

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Renormalization of the tensor current in lattice QCD and the

J / ψ

tensor decay constant

Autor: G. P. Lepage, Christine Davies, A. T. Lytle, D. Hatton

Publikováno v: Physical Review

Lattice QCD calculations of form factors for rare Standard Model processes such as $B \to K \ell^+ \ell^-$ use tensor currents that require renormalisation. These renormalisation factors, $Z_T$, have typically been calculated within perturbation theo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82a76cf4d9e37c6d3f995512849693bb
http://repo.scoap3.org/api

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Charmonium properties from lattice QCD+QED : Hyperfine splitting, J/ψ leptonic width, charm quark mass, and aμc

Autor: D. Hatton, B. Galloway, Christine Davies, G. P. Lepage, J. Koponen, A. T. Lytle

Publikováno v: Physical Review D. 102

We have performed the first n f = 2 + 1 + 1 lattice QCD computations of the properties (masses and decay constants) of ground-state charmonium mesons. Our calculation uses the HISQ action to generate quark-line connected two-point correlation functio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::500f3df00dee59a3c46d1159eae16453
https://doi.org/10.1103/physrevd.102.054511

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QED interaction effects on heavy meson masses from lattice QCD+QED

Autor: G. P. Lepage, D. Hatton, Christine Davies

Publikováno v: Physical Review

Hadron masses are subject to few MeV corrections arising from QED interactions, almost entirely arising from the electric charge of the valence quarks. The QED effects include both self-energy contributions and interactions between the valence quarks

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::694975be35ed865cc826e7e5fe225c42
http://arxiv.org/abs/2009.07667

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