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

• Grant number: 18/20982-6
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: December 01, 2018
• End date: 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

Abstract

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.