Padé approximants and the QCD perturbative series for tau decays into hadrons
High-precision determination of the charm and bottom quark masses
| Grant number: | 19/17046-0 |
| Support Opportunities: | Scholarships abroad - Research Internship - Master's degree |
| Effective date (Start): | October 05, 2019 |
| Effective date (End): | March 20, 2020 |
| Field of knowledge: | Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields |
| Principal Investigator: | Diogo Rodrigues Boito |
| Grantee: | Gabriel Augusto das Neves |
| Supervisor: | Jan Piclum |
| Host Institution: | Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil |
| Research place: | University of Siegen, Germany |
| Associated to the scholarship: | 18/12305-4 - Angular distributions of the decay tau to K PI neutrino, BP.MS |
Abstract In the absence of direct observation of Beyond Standard Model physics in the LHC, precise tests of the theory require increasing precision. The decay width of the Higgs boson into gluons is known up to fourth order in the strong coupling, alpha_s. In this work, we will study the effects due to higher-order QCD corrections in this decay. The main calculation of this project will be performed in the large-beta_0 limit of QCD, where the perturbative series is known to all orders in alpha_s. Our goal is to rigorously predict the neglected contributions in the present theoretical calculation and obtain, in a reliable way, the theoretical uncertainties associated with the truncation of the perturbative series. The best prescription for the renormalization-scale setting in the process will also be studied. (AU) | |
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