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Precise determination of fundamental QCD parameters

Grant number: 15/20689-9
Support type:Research Grants - Young Investigators Grants
Duration: February 01, 2016 - July 31, 2020
Field of knowledge:Physical Sciences and Mathematics - Physics
Principal Investigator:Diogo Rodrigues Boito
Grantee:Diogo Rodrigues Boito
Home Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated grant(s):18/14967-4 - High-precision determination of the charm and bottom quark masses, AP.R
Associated scholarship(s):18/21050-0 - Higher-order QCD in the Higgs decay to bottom quarks, BP.MS
18/20982-6 - Asymptotic freedom in the cross section for electron-positron in hadrons, BP.IC
18/12305-4 - Angular distributions of the decay tau to K PI neutrino, BP.MS
+ associated scholarships 18/02182-2 - The deuteron and standard model mass scale, BP.IC
17/12396-7 - Electroweak effects in atomic physics, BP.IC
16/01613-4 - Connected states qq and alpha s corrections to potential, BP.IC
16/01341-4 - Padé approximants and the QCD perturbative series for tau decays into hadrons, BP.MS - associated scholarships

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 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 tau decays. The first goal of this research project is to refine the determination of alpha_s --- the strong coupling --- combining 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, other research lines, linked to LHC physics should also be explored. First, the precise theoretical description of hadronic interactions in three body decays of D and B mesons. Finally, we should study experimental constraints on anomalous couplings of the Higgs boson in the context of the dimension 6 effective lagragian. This research project should contribute to establish Particle Physics Phenomenology as a research line at the IFSC-USP. (AU)

Scientific publications (10)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
BOITO, DIOGO; GOLTERMAN, MAARTEN; MALTMAN, KIM; PERIS, SANTIAGO. Evidence against naive truncations of the OPE from e(+) e(-) -> hadrons below charm. Physical Review D, v. 100, n. 7 OCT 10 2019. Web of Science Citations: 0.
BOITO, DIOGO; GOLTERMAN, MAARTEN; KESHAVARZI, ALEXANDER; MALTMAN, KIM; NOMURA, DAISUKE; PERIS, SANTIAGO; TEUBNER, THOMAS. Strong coupling from e(+)e(-) -> hadrons below charm. Physical Review D, v. 98, n. 7 OCT 31 2018. Web of Science Citations: 2.
BOITO, DIOGO; MASJUAN, PERE; OLIANI, FABIO. Higher-order QCD corrections to hadronic tau decays from Pade approximants. Journal of High Energy Physics, n. 8 AUG 14 2018. Web of Science Citations: 3.
BOITO, DIOGO; CAPRINI, IRINEL; GOLTERMAN, MAARTEN; MALTMAN, KIM; PERIS, SANTIAGO. Hyperasymptotics and quark-hadron duality violations in QCD. Physical Review D, v. 97, n. 5 MAR 12 2018. Web of Science Citations: 6.
BOITO, D.; DEDONDER, J. -P.; EL-BENNICH, B.; ESCRIBANO, R.; KAMINSKI, R.; LESNIAK, L.; LOISEAU, B. Parametrizations of three-body hadronic B- and D-decay amplitudes in terms of analytic and unitary meson-meson form factors. Physical Review D, v. 96, n. 11 DEC 12 2017. Web of Science Citations: 6.
BOITO, DIOGO; CAPRINI, IRINEL. Towards tests of quark-hadron duality with functional analysis and spectral function data. Physical Review D, v. 95, n. 7 APR 20 2017. Web of Science Citations: 2.
BOITO, DIOGO; GOLTERMAN, MAARTEN; MALTMAN, KIM; PERIS, SANTIAGO. Strong coupling from hadronic tau decays: A critical appraisal. Physical Review D, v. 95, n. 3 FEB 22 2017. Web of Science Citations: 8.
BOITO, DIOGO; JAMIN, MATTHIAS; MIRAVITLLAS, RAMON. Scheme Variations of the QCD Coupling and Hadronic tau Decays. Physical Review Letters, v. 117, n. 15 OCT 3 2016. Web of Science Citations: 13.
PERIS, SANTIAGO; BOITO, DIOGO; GOLTERMAN, MAARTEN; MALTMAN, KIM. The case for duality violations in the analysis of hadronic tau decays. MODERN PHYSICS LETTERS A, v. 31, n. 30 SEP 28 2016. Web of Science Citations: 5.
BOITO, DIOGO; GOLTERMAN, MAARTEN; MALTMAN, KIM; PERIS, SANTIAGO. alpha s analyses from hadronic tau decays with OPAL and ALEPH data. MODERN PHYSICS LETTERS A, v. 31, n. 26 AUG 30 2016. Web of Science Citations: 1.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.