| Texto completo | |
| Autor(es): |
Boito, D.
;
Golterman, M.
;
Maltman, K.
;
Peris, S.
;
Rodrigues, M. V.
;
Schaaf, W.
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | 41ST INTERNATIONAL CONFERENCE ON HIGH ENERGY PHYSICS; v. N/A, p. 6-pg., 2023-01-01. |
| Resumo | |
We discuss a new determination of the strong coupling at the tau-mass scale, alpha(s)(m(tau)(2)), based on a new vector isovector spectral function, which combines ALEPH and OPAL spectra for the dominant 2 pi and 4 pi decay channels with estimates for several sub-leading contributions obtained using CVC from recently measured electroproduction cross-sections, as well as results for tau -> (K-K0)nu(tau) obtained by BaBar. This fully inclusive vector isovector spectral function is entirely based on experimental data, and no longer relies on Monte Carlo input for any of the sub-leading modes. We obtain alpha(s)(m(tau)) = 0.3077 +/- 0.0075, corresponding to alpha(s)(m(Z)) = 0.1171 +/- 0.0010. (AU) | |
| Processo FAPESP: | 21/06756-6 - Testes do modelo padrão: QCD de precisão e g-2 do múon |
| Beneficiário: | Diogo Rodrigues Boito |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores - Fase 2 |
| Processo FAPESP: | 19/16957-9 - Determinação precisa da massa do quark C |
| Beneficiário: | Marcus Vinícius Gonzalez Rodrigues |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |