| Autor: |
Bazavov, Alexei, Clarke, David A., Davies, Christine, DeTar, Carleton, El-Khadra, Aida X., Gámiz, Elvira, Gottlieb, Steven, Grebe, Anthony V., Hostetler, Leon, Jay, William I., Jeong, Hwancheol, Kronfeld, Andreas S., Lahert, Shaun, Laiho, Jack, Lepage, G. Peter, Lynch, Michael, Lytle, Andrew T., McNeile, Craig, Neil, Ethan T., Peterson, Curtis T., Simone, James N., Sitison, Jacob W., Van de Water, Ruth S., Vaquero, Alejandro |
| Rok vydání: |
2024 |
| Předmět: |
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| Druh dokumentu: |
Working Paper |
| Popis: |
We present complete results for the hadronic vacuum polarization (HVP) contribution to the muon anomalous magnetic moment $a_\mu$ in the short- and intermediate-distance window regions, which account for roughly 10% and 35% of the total HVP contribution to $a_\mu$, respectively. In particular, we perform lattice-QCD calculations for the isospin-symmetric connected and disconnected contributions, as well as corrections due to strong isospin-breaking. For the short-distance window observables, we investigate the so-called log-enhancement effects as well as the significant oscillations associated with staggered quarks in this region. For the dominant, isospin-symmetric light-quark connected contribution, we obtain $a^{ll,\,{\mathrm{SD}}}_{\mu}(\mathrm{conn.}) = 48.116(16)(94)[96] \times 10^{-10}$ and $a^{ll,\,{\mathrm{W}}}_{\mu}(\mathrm{conn.}) = 207.06(17)(63)[66] \times 10^{-10}$. We use Bayesian model averaging combined with a global bootstrap to fully estimate the covariance matrix between the individual contributions. Our determinations of the complete window contributions are $a^{{\mathrm{SD}}}_{\mu} = 69.01(2)(21)[21] \times 10^{-10}$ and $a^{{\mathrm{W}}}_{\mu} = 236.57(20)(94)[96] \times 10^{-10}$. This work is part of our ongoing effort to compute all contributions to HVP with an overall uncertainty at the few permille level. |
| Databáze: |
arXiv |
| Externí odkaz: |
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