5 papers
Renormalization of general Effective Field Theories: Renormalization of fermionic operators
Renato M. Fonseca, Pablo Olgoso, José Santiago
Renormalization group equations play a central role in effective field theories, both maintaining perturbative control and allowing one to determine the correct low-energy phenomen…
Gauge theories from scattering amplitudes with minimal assumptions
Renato M. Fonseca, Clara Hernandez-Garcia, Javier M. Lizana +1
We revisit the emergence of a Yang-Mills symmetry in theories with massless spin 1 particles from fundamental physical properties of scattering amplitudes. In the standard proofs,…
Renormalization of general Effective Field Theories: Formalism and renormalization of bosonic operators
Renato M. Fonseca, Pablo Olgoso, José Santiago
We describe the most general local, Lorentz-invariant, effective field theory of scalars, fermions and gauge bosons up to mass dimension 6. We first obtain both a Green and a physi…
Using SimTeEx to simplify polynomial expressions with tensors
Renato M. Fonseca
Computations with tensors are ubiquitous in fundamental physics, and so is the usage of Einstein's dummy index convention for the contraction of indices. For instance, $T_{ia}U_{aj…
The Landscape of Composite Higgs Models
Mikael Chala, Renato Fonseca
We classify all different composite Higgs models (CHMs) characterised by the coset space of compact semi-simple Lie groups and inv…