Nambu-Goldstone bosons interactions from an on-shell perspective

• Grant number: 22/07360-1
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: October 01, 2022
• End date: September 30, 2023
• Field of knowledge: Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
• Principal Investigator: Enrico Bertuzzo
• Grantee: Gabriel Massoni Salla
• Supervisor: Christophe Grojean
• Host Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Institution abroad: Helmholtz Association, Germany
• Associated to the scholarship: 20/14713-2 - Aspects of the neutrino-dark matter connection, BP.DR

Abstract

We propose to study how Nambu-Goldstone bosons interact with matter using modern on-shell methods, i.e. bypassing completely Lagrangians or quantum fields. This open problem has important repercussions on UV models containing a composite Higgs, axion-like particles, pseudoscalar mesons and neutrino propagation in a dark matter background, and can lead to a better understanding of the deeper structure of scattering amplitudes. (AU)