Zobrazeno 1 - 10
of 858
pro vyhledávání: '"LePage, G A"'
We calculate the decay rate for $\eta_b \to \gamma \gamma$ in lattice QCD for the first time, providing a precise prediction for the Belle II experiment. Our calculation includes $u$, $d$, $s$ and $c$ quarks in the sea, using gluon field configuratio
Externí odkaz:
http://arxiv.org/abs/2410.24041
An accurate calculation of the leading-order hadronic vacuum polarisation (LOHVP) contribution to the anomalous magnetic moment of the muon ($a_\mu$) is key to determining whether a discrepancy, suggesting new physics, exists between the Standard Mod
Externí odkaz:
http://arxiv.org/abs/2410.23832
We calculate the decay rates for $\eta_c \to \gamma \gamma$, $J/\psi \to \gamma \eta_c$ and $J/\psi \to \eta_c e^+e^-$ in lattice QCD with $u$, $d$, $s$ and $c$ quarks in the sea for the first time. We improve significantly on previous theory calcula
Externí odkaz:
http://arxiv.org/abs/2305.06231
Autor:
Bazavov, Alexei, Davies, Christine, DeTar, Carleton, El-Khadra, Aida X., Gámiz, Elvira, Gottlieb, Steven, Jay, William I., Jeong, Hwancheol, Kronfeld, Andreas S., Lahert, Shaun, Lepage, G. Peter, Lynch, Michael, Lytle, Andrew T., Mackenzie, Paul B., McNeile, Craig, Neil, Ethan T., Peterson, Curtis T., Ray, Gaurav, Simone, James N., Van de Water, Ruth S., Vaquero, Alejandro
Publikováno v:
Phys. Rev. D 107, 114514 (2023)
We present a lattice-QCD calculation of the light-quark connected contribution to window observables associated with the leading-order hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon, $a_\mu^{\mathrm{HVP,LO}}$.
Externí odkaz:
http://arxiv.org/abs/2301.08274
Autor:
Davies, C. T. H., DeTar, C., El-Khadra, A. X., Gottlieb, Steven, Hatton, D., Kronfeld, A. S., Lahert, S., Lepage, G. P., McNeile, C., Neil, E. T., Peterson, C. T., Ray, G. S., Van de Water, R. S., Vaquero, A.
An accurate determination of the leading-order hadronic vacuum polarisation (HVP) contribution to the anomalous magnetic moment of the muon is critical to understanding the size and significance of any discrepancy between the Standard Model predictio
Externí odkaz:
http://arxiv.org/abs/2207.04765
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:
http://arxiv.org/abs/2204.02137
As tests of QCD in the bottomonium system, we give the most accurate results to date for the ground-state hyperfine splitting and the $\Upsilon$ leptonic width from full lattice QCD. These quantities are both accurately known from experiment, so can
Externí odkaz:
http://arxiv.org/abs/2111.06149
Autor:
Parrott, W. G., Chakraborty, Bipasha, Bouchard, C., Davies, C. T. H., Koponen, J., Lepage, G. P.
Semileptonic $D \to{}K \ell \nu$ decays provide one angle of attack to get at the CKM matrix element $V_{cs}$, complementary to the study of leptonic $D_s$ decays. Here, HPQCD present the results of a recently published, improved determination of $V_
Externí odkaz:
http://arxiv.org/abs/2111.02718
Autor:
Chakraborty, Bipasha, Parrott, W. G., Bouchard, C., Davies, C. T. H., Koponen, J., Lepage, G. P.
Publikováno v:
Phys. Rev. D 104, 034505 (2021)
We provide a 0.8\%-accurate determination of $V_{cs}$ from combining experimental results for the differential rate of $D \rightarrow K$ semileptonic decays with precise form factors that we determine from lattice QCD. This is the first time that $V_
Externí odkaz:
http://arxiv.org/abs/2104.09883
Determination of $\overline{m}_b/\overline{m}_c$ and $\overline{m}_b$ from $n_f=4$ lattice QCD$+$QED
Publikováno v:
Phys. Rev. D 103, 114508 (2021)
We extend HPQCD's earlier $n_f=4$ lattice-QCD analysis of the ratio of $\overline{\mathrm{MSB}}$ masses of the $b$ and $c$ quark to include results from finer lattices (down to 0.03fm) and a new calculation of QED contributions to the mass ratio. We
Externí odkaz:
http://arxiv.org/abs/2102.09609