Higher-order QCD in Higgs in to gluon-gluon

• Grant number: 22/01861-9
• Support Opportunities: Scholarships in Brazil - Master
• Start date: April 01, 2022
• End date: March 31, 2024
• Field of knowledge: Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
• Principal Investigator: Diogo Rodrigues Boito
• Grantee: Guilherme de Araújo Nogueira
• Host Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated research grant: 21/06756-6 - Testing the standard model: precision QCD and muon g-2, AP.JP2

Abstract

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 a significant truncation uncertainty associated with renormalization scale variations. Reducing this uncertainty is vital for future precision tests of Higgs physics in the facilities such as the FCC-ee. In this work we will producea model independent estimate of the series at higher orders and study the intrinsic truncation uncertainty in the light of our results, using renormalization scheme variations and modern methods to estimate the error associated with missing higher orders.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

NOGUEIRA, Guilherme de Araújo. Higher-order QCD in Higgs to gluon gluon. 2024. Master's Dissertation - Universidade de São Paulo (USP). Instituto de Física de São Carlos (IFSC/BT) São Carlos.