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Higher-order QCD corrections to hadronic tau decays from Pade approximants

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Autor(es):
Boito, Diogo ; Masjuan, Pere ; Oliani, Fabio
Número total de Autores: 3
Tipo de documento: Artigo Científico
Fonte: NUCLEAR AND PARTICLE PHYSICS PROCEEDINGS; v. 309, p. 6-pg., 2020-01-01.
Resumo

The mathematical method of Pade approximants is put forward to reconstruct the Borel transformed series of the Adler function and extract higher-order corrections in a model-independent way. The use of the D-log Pade approximants provides valuable information to its analytic structure and yields, together with the standard Pade approximants, reliable model-independent predictions of the higher-order coefficients, as for example, c(5)(,1) = 277 +/- 51. Such reconstruction strongly favours the use of fixed-order perturbation theory (FOPT) for the renormalization-scale setting. (AU)

Processo FAPESP: 15/20689-9 - Determinação precisa de parâmetros fundamentais da QCD
Beneficiário:Diogo Rodrigues Boito
Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
Processo FAPESP: 16/01341-4 - Aproximantes de Padé e a série perturbativa da QCD em decaimentos tau em hadrons
Beneficiário:Fabio Henrique Oliani
Modalidade de apoio: Bolsas no Brasil - Mestrado