| Texto completo | |
| Autor(es): |
Boito, Diogo
;
Eiben, Aaron
;
Golterman, Maarten
;
Maltman, Kim
;
Mansur, Lucas M.
;
Peris, Santiago
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 111, n. 7, p. 29-pg., 2025-04-09. |
| Resumo | |
In previous work we have combined the pi-pi 0, 2 pi- pi+pi 0, and pi-3 pi 0 spectral data obtained from hadronic tau decays measured by the ALEPH and OPAL experiments, together with electroproduction data for several of the subleading hadronic modes and BABAR data for the KK<overline> mode to construct an inclusive nonstrange vector spectral function entirely based on experimental data, with no Monte-Carlo generated input. In this paper, we include, for the first time, the Belle tau -* pi-pi 0 nu tau high-statistics decay data to construct a new inclusive nonstrange vector spectral function that combines more of the world's available data. As no Belle data are at present available for the two 4 pi modes, this requires a revised data analysis in comparison with our previous work. From the resulting new spectral function, we obtain a new determination of the strong coupling, alpha s, using our previously developed strategy based on finite-energy sum rules. We find, at the Z mass scale, alpha s(m2Z) = 0.1159(14). We discuss the smaller central value and larger error of our new result compared to our previous result, showing the shifts to be due mainly to significant changes in updated HFLAV results for the pi-3 pi 0 decay mode. (AU) | |
| Processo FAPESP: | 22/16553-8 - Refinando o momento magnético anômalo do múon no modelo padrão com decaimentos hadrônicos do tau e QCD na rede |
| Beneficiário: | Lucas Morethes Mansur |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |
| Processo FAPESP: | 23/08482-6 - Aprimorando a função espectral vetor-isovetor hadrônica com decaimentos do tau e dados de eletroprodução |
| Beneficiário: | Lucas Morethes Mansur |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Mestrado |
| 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 |