Zobrazeno 1 - 10
of 210
pro vyhledávání: '"Colangelo, Gilberto"'
We summarize recent developments in the Standard-Model evaluation of the anomalous magnetic moment of the muon $a_\mu$, both in the hadronic-light-by-light and hadronic-vacuum-polarization contributions. The current situation for the latter is puzzli
Externí odkaz:
http://arxiv.org/abs/2308.04217
Autor:
Hoferichter, Martin, Colangelo, Gilberto, Hoid, Bai-Long, Kubis, Bastian, de Elvira, Jacobo Ruiz, Schuh, Dominic, Stamen, Dominik, Stoffer, Peter
Publikováno v:
Phys. Rev. Lett. 131, 161905 (2023)
Puzzles in the determination of the hadronic-vacuum-polarization contribution currently impede a conclusive interpretation of the precision measurement of the anomalous magnetic moment of the muon at the Fermilab experiment. One such puzzle concerns
Externí odkaz:
http://arxiv.org/abs/2307.02532
Autor:
Hoferichter, Martin, Colangelo, Gilberto, Hoid, Bai-Long, Kubis, Bastian, de Elvira, Jacobo Ruiz, Stamen, Dominik, Stoffer, Peter
Publikováno v:
PoS(LATTICE2022)316
By far the biggest contribution to hadronic vacuum polarization (HVP) arises from the two-pion channel. Its quark-mass dependence can be evaluated by combining dispersion relations with chiral perturbation theory, providing guidance on the functional
Externí odkaz:
http://arxiv.org/abs/2210.11904
Autor:
Davoudi, Zohreh, Neil, Ethan T., Bauer, Christian W., Bhattacharya, Tanmoy, Blum, Thomas, Boyle, Peter, Brower, Richard C., Catterall, Simon, Christ, Norman H., Cirigliano, Vincenzo, Colangelo, Gilberto, DeTar, Carleton, Detmold, William, Edwards, Robert G., El-Khadra, Aida X., Gottlieb, Steven, Gupta, Rajan, Hackett, Daniel C., Hasenfratz, Anna, Izubuchi, Taku, Jay, William I., Jin, Luchang, Kelly, Christopher, Kronfeld, Andreas S., Lehner, Christoph, Lin, Huey-Wen, Lin, Meifeng, Lytle, Andrew T., Meinel, Stefan, Meurice, Yannick, Mukherjee, Swagato, Nicholson, Amy, Prelovsek, Sasa, Savage, Martin J., Shanahan, Phiala E., Van De Water, Ruth S., Wagman, Michael L., Witzel, Oliver
Lattice gauge theory continues to be a powerful theoretical and computational approach to simulating strongly interacting quantum field theories, whose applications permeate almost all disciplines of modern-day research in High-Energy Physics. Whethe
Externí odkaz:
http://arxiv.org/abs/2209.10758
Publikováno v:
JHEP 10, 032 (2022)
Isospin-breaking (IB) effects in the two-pion contribution to hadronic vacuum polarization (HVP) can be resonantly enhanced, if related to the interference of the $\rho(770)$ and $\omega(782)$ resonances. This particular IB contribution to the pion v
Externí odkaz:
http://arxiv.org/abs/2208.08993
Publikováno v:
JHEP 08, 295 (2022)
We present a calculation of the $C$-odd radiative corrections to $e^+e^-\to \pi^+\pi^-$ in a dispersive formalism, concentrating on the leading pion-pole contribution in the virtual box diagrams. In particular, we show how the effect of a general pio
Externí odkaz:
http://arxiv.org/abs/2207.03495
Autor:
Colangelo, Gilberto, Hoferichter, Martin, Kubis, Bastian, Niehus, Malwin, de Elvira, Jacobo Ruiz
Publikováno v:
Phys. Lett. B 825 (2022) 136852
We study the pion-mass dependence of the two-pion channel in the hadronic-vacuum-polarization (HVP) contribution to the anomalous magnetic moment of the muon $a_\mu^\text{HVP}$, by using an Omn\`es representation for the pion vector form factor with
Externí odkaz:
http://arxiv.org/abs/2110.05493
Publikováno v:
SciPost Phys.Proc. 5 (2021) 005
This article gives a compact introduction and overview of the theory underlying the experiments described in the rest of this review.
Comment: This is Chapter 5 of the Review of Particle Physics at PSI, published in SciPost Proceedings 5
Comment: This is Chapter 5 of the Review of Particle Physics at PSI, published in SciPost Proceedings 5
Externí odkaz:
http://arxiv.org/abs/2109.11948
Autor:
Colangelo, Gilberto, Hagelstein, Franziska, Hoferichter, Martin, Laub, Laetitia, Stoffer, Peter
Publikováno v:
Eur. Phys. J. C 81 (2021) 8, 702
We reassess the impact of short-distance constraints for the longitudinal component of the hadronic light-by-light amplitude on the anomalous magnetic moment of the muon, $a_\mu=(g-2)_\mu/2$, by comparing different solutions that have recently appear
Externí odkaz:
http://arxiv.org/abs/2106.13222
Publikováno v:
Phys. Lett. B 814 (2021) 136073
At low energies hadronic vacuum polarization (HVP) is strongly dominated by two-pion intermediate states, which are responsible for about $70\%$ of the HVP contribution to the anomalous magnetic moment of the muon, $a_\mu^\text{HVP}$. Lattice-QCD eva
Externí odkaz:
http://arxiv.org/abs/2010.07943