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Precise determination of the C quark mass

Grant number: 19/16957-9
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): March 01, 2020
Effective date (End): December 31, 2021
Field of knowledge:Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
Principal Investigator:Diogo Rodrigues Boito
Grantee:Marcus Vinícius Gonzalez Rodrigues
Host 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
Associated scholarship(s):20/15522-6 - Precise determination of the c quark mass, BE.EP.MS


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 pseudoscalar correlator,where the theoretical prediction in pertubative QCD is compared tolattice QCD data, which have increased a lot in precision lately. Atthe moment, this determination is limited by the theoreticalprediction, since the pertubative series of the pseudoscalarcorrelator, known up to third order in $\alpha_s$, is rather unstable.The main goal of this research project is to understand the origin ofthis instability in the pertubative series in terms of thesingularities known as renormalons. Thereby, one can find rigorousmethods in order to circumvent this instability and be able to fullyuse lattice QCD data for a precise determination of $m_c$ andtherefore contribute to precise tests of the Standard Model. (AU)

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Scientific publications
(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; RODRIGUES, V, MARCUS; SCHAAF, WILDER. Strong coupling from an improved tau vector isovector spectral function. Physical Review D, v. 103, n. 3, . (15/20689-9, 19/16957-9)
BOITO, DIOGO; MATEU, VICENT; RODRIGUES, MARCUS V.. Small-momentum expansion of heavy-quark correlators in the large-beta(0) limit and alpha(s) extractions. Journal of High Energy Physics, n. 8, . (15/20689-9, 18/14967-4, 19/16957-9)
BOITO, DIOGO; GOLTERMAN, MAARTEN; MALTMAN, KIM; PERIS, SANTIAGO; RODRIGUES, MARCUS, V; SCHAAF, WILDER. Strong coupling from an improved tau vector isovector spectral function. PHYSICAL REVIEW D, v. 103, n. 3, p. 24-pg., . (15/20689-9, 19/16957-9)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
RODRIGUES, Marcus Vinícius Gonzalez. Higher-order behaviour of heavy-quark current correlators in the small-momentum expansion. 2021. Master's Dissertation - Universidade de São Paulo (USP). Instituto de Física de São Carlos (IFSC/BT) São Carlos.

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