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Higher-order QCD in the Higgs decay to bottom quarks

Grant number: 18/21050-0
Support type:Scholarships in Brazil - Master
Effective date (Start): November 01, 2019
Effective date (End): February 28, 2021
Field of knowledge:Physical Sciences and Mathematics - Physics
Principal Investigator:Diogo Rodrigues Boito
Grantee:Cristiane Yumi Mise London
Home Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated research grant:15/20689-9 - Precise determination of fundamental QCD parameters, AP.JP


In the absence of direct observation of physics beyond the standard model in LHC, precise tests of the theory require higher precision. The decay width of the Higgs boson into bottom quarks is known up to fourth order in the strong coupling, alpha_s. In this work, using the knowledge of renormalons of the perturbative series and the method of Padé approximants, we will study the higher terms of the perturbative series in alpha_s for this process. The goal is to accurately predict these contributions and thus reliably obtain the error due to the truncation of the perturbative series, contributing to the precise knowledge of the decay width of the Higgs into bottom quarks in the standard model.