Produção Nacional
Revisado por pares
Higher-order QCD corrections to H → b$$ \overline{b} $$ from rational approximants
2022; Springer Nature; Volume: 2022; Issue: 1 Linguagem: Inglês
10.1007/jhep01(2022)054
ISSN1127-2236
AutoresDiogo Boito, Cristiane Y. London, Pere Masjuan,
Tópico(s)Black Holes and Theoretical Physics
ResumoA bstract We use rational approximants to study missing higher orders in the massless scalar-current quark correlator. We predict the yet unknown six-loop coefficient of its imaginary part, related to Γ( H → b $$ \overline{b} $$ b ¯ ), to be c 5 = − 6900 ± 1400. With this result, the perturbative series becomes almost insensitive to renormalization scale variations and the intrinsic QCD truncation uncertainty is tiny. This confirms the expectation that higher-order loop computations for this quantity will not be required in the foreseeable future, as the uncertainty in Γ( H → b $$ \overline{b} $$ b ¯ ) will remain largely dominated by the Standard Model parameters.
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