High-precision determination of the charm and bottom quark masses
Width of Hadronic States and Radiative Corrections in QCD Sum Rules
Padé approximants and the QCD perturbative series for tau decays into hadrons
Grant number: | 14/50683-0 |
Support Opportunities: | Scholarships in Brazil - Post-Doctorate |
Effective date (Start): | November 01, 2014 |
Effective date (End): | August 31, 2015 |
Field of knowledge: | Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields |
Principal Investigator: | Marina Nielsen |
Grantee: | Diogo Rodrigues Boito |
Host Institution: | Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil |
Abstract The precise knowledge of fundamental Quantum Chromodynamics (QCD) parameters is essential to precision calculations in particle physics. Several of them can be determined through the sound theoretical description" of decays tau u → hadrons + nu_tau combined with experimental data obtained at LEP (CERN). In 2014, the group responsible for the ALEPH data published a re-analysis of the data for tau u → hadrons + nu_tau. The first goal of this research project is a new determination of alpha_s - the strong coupling - that combines the recent theoretical developments with the data sets from ALEPH and OPAL collaborations. Other aspects of the theoretical description will also be assessed, e.g., low-energy constants, the contribution of condensates, and violations of quark-hadron duality. In our work, it will also be important to investigate more fundamental theoretical aspects of perturbative QCD, such as the use of the renormalization group. In parallel, another research subject that can be explored is the anomalous Higgs couplings in the context of the dimension 6 effective Lagrangian. (AU) | |
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