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Asymptotic freedom in the cross section for electron-positron in hadrons

Grant number: 18/20982-6
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): December 01, 2018
Effective date (End): November 30, 2019
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


The calculation of the cross section of the process e+e- to hadrons is one of the main tests of Quantum Chromodynamics (QCD), the theory of strong interactions. Asymptotic freedom, as predicted by the QCD beta function, which dictates that the strong coupling decreases for higher energies is a crucial ingredient in this calculation. The main goal of this research project is to test asymptotic freedom with the one-loop running of the strong coupling and recent data for the cross section of e+e- to hadrons.

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