Diogo Rodrigues Boito in research grants and scholarships supported by FAPESP.
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The absence of a clear experimental signal for beyond Standard Model physics at the LHC indicates that, in the next few years, many tests of the Standard Model will be based on indirect searches through precision physics. In this context, an excellent control over Quantum Chromodynamics (QCD) is essential, since the precise description of several key observables in particle physics requir…
Quark masses are fundamental parameters of the Standard Model that play a keyrole in precision tests of the theory. They cannot be directly observed due to the confining nature of the strong interactions and can only be measured indirectly through observables that strongly depend on them and which can be computed with high precision in QCD. An example of these observables are moment…
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 hadronic tau decays 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 hadronic …
The muon anomalous magnetic moment, a_mu, is one of the most precisely known quantities in physics. The measurement of a_mu in 2021 by the FNAL E989 experiment (at Fermilab) has confirmed the tension between the experimental result and the predictions based on the Standard Model of particle physics. The SM prediction relied, for a long time, on a data-based dispersion relation for the had…
The precise knowledge of the decay of the Higgs boson in two gluons is crucial for testing the Higgs sector of the standard model. The decay amplitude starts at one loop and is known today at next-to-next-to-next-to-next-to-leading order. However, in spite of this monumental result, the perturbative QCD series for this process does not display a good convergence order by order and retains…
The top quark was the last fermion to be discovered and is the heaviest elementary particle that is known. Its mass is a fundamental parameter of the standard model and the its precise knowledge will be crucial for future precision tests of the theory. The most promising strategy to determine the mass precisely is from the measurement of the cross-section for e+e- --> t bar t close to the…
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With the recent experimental measurement of g - 2of the muon at Fermilab, this observable shows now a tension at level of 4.2 standard deviations with respect to the standard model predictions. In the present research project, we will build a realistic model for the cross-section for e+e- to hadrons, from which the hadronic vacuum polarization contribution to the muon g -2 can be extracte…
In the absence of direct observation of Beyond Standard Model physicsat the LHC, precise tests of the theory require increasing precision.In many calculations, the limiting factor is the precision of thefundamental parameters of QCD, namely the strong coupling and quarkmasses. In the case of the c quark mass, a promising method for itsextraction is the use of sum rules for the pseudoscala…
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 te…
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The determination of the Quantum Chromodynamics (QCD) coupling, alpha_s, from the theoretical description of inclusive tau in (hadrons) + nu_tau decays, dominated by perturbative QCD, is one of the most precise as extractions from experimental data. In these decays, the hadronic vector and axial vector spectral functions are experimentally accessible. Recently, we have shown that the vect…
In the absence of direct evidence for physics beyond the Standard Model (BSM), indirect searches play a major role in testing the theory. At present, one of the most prominent examples is the anomalous magnetic moment of the muon, known as g_mu-2. The latest experimental result from the Muon g-2 collaboration, published in 2021, shows a 4.2 sigma tension with the dispersion-relation based…
High-precision calculations in Quantum Chromodynamics (QCD) are one of the main challenges in high-energy physics and are crucial for beyond standard model searches at the LHC and future facilities. In this project, we will apply the techniques developed by members of the Particle Physics group of University of Vienna to improve the theoretical understanding of several processes that ca…
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 perfor…
| 1 / 1 | Ongoing research grants |
| 2 / 2 | Completed research grants |
| 5 / 5 | Ongoing scholarships in Brazil |
| 14 / 10 | Completed scholarships in Brazil |
| 1 / 1 | Ongoing scholarships abroad |
| 3 / 3 | Completed scholarships abroad |
| 26 / 22 | All research grants and scholarships |
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