Higher-order QCD corrections to H -> b(b)over-bar from rational approximants

Autor(es)

Boito, Diogo ^{[1, 2]} ; London, Cristiane Y. ^[1] ; Masjuan, Pere ^{[3, 4]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis Sao Carlos, CP 369, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Vienna, Fac Phys, Boltzmanngasse 5, A-1090 Vienna - Austria

^[3] Univ Autonoma Barcelona, Grp Fis Teor, Dept Fis, Campus UAB, E-08193 Bellaterra, Barcelona - Spain

^[4] Barcelona Inst Sci & Technol BIST, Inst Fis Altes Energies IFAE, Campus UAB, E-08193 Bellaterra, Barcelona - Spain

• Tipo de documento: Artigo Científico
• Fonte: Journal of High Energy Physics; n. 1 JAN 12 2022.
• Citações Web of Science: 0

Resumo

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 imag inary part, related to Gamma(H -> b (b) over bar), 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 uncer tainty in Gamma(H -> b (b) over bar) will remain largely dominated by the Standard Model parameters. (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: 18/21050-0 - QCD em ordens altas no decaimento do Higgs em quarks bottom
• Beneficiário: Cristiane Yumi Mise London
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 20/15532-1 - Interação quark-antiquark: a massa do quark top e o propagador do glúon no infra-vermelho
• Beneficiário: Cristiane Yumi Mise London
• Modalidade de apoio: Bolsas no Brasil - Doutorado