Higher-order QCD corrections to H → b b ¯ $$ \overline{b} $$ from rational approximants
Abstract 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 b ¯ $$ \overline{b} $$ ), to be c 5 = −6900 ± 1400. With this result, the perturbative serie...
| Published in: | Journal of High Energy Physics |
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| Main Authors: | , , |
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2022-01-01
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| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP01(2022)054 |
| Summary: | Abstract 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 b ¯ $$ \overline{b} $$ ), 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 b ¯ $$ \overline{b} $$ ) will remain largely dominated by the Standard Model parameters. |
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| ISSN: | 1029-8479 |