Renato Fonseca

About me

I am currently a postdoctoral fellow at the AHEP group, which belongs to Instituto de Física Corpuscular, in Valencia. I did my Ph.D. at CFTP, a research center of Instituto Superior Técnico, in Lisbon, under the supervision of Jorge C. Romão and Ana M. Teixeira.

I have worked on the following areas:

• Grand unified theories and group theory for model building
• Flavour symmetries
• Neutrino mass and neutrinoless double beta decay models
• Phenomenology of supersymmetric models
• Lepton flavor violation
• Computation of renormalization group equations

Publications

• Lepton number violation in 331 models
  Renato Fonseca and Martin Hirsch
  (Submitted to Physical Review D)
• A flipped 331 model
  Renato Fonseca and Martin Hirsch
  JHEP 08 (2016) 003
• Roots of unity and lepton mixing patterns from finite flavour symmetries
  Renato Fonseca and Walter Grimus
  (Contribution to the proceedings of the conference "Matter to the Deepest")
  Acta Phys. Polon. B46 (2015) No. 11, 2407
• Consistency of the triplet seesaw revisited
  Cesar Bonilla, Renato Fonseca, José Valle
  Physical Review D 92, 075028 (2015)
• Vacuum stability with spontaneous violation of lepton number
  Cesar Bonilla, Renato Fonseca, José Valle
  Physics Letters B 756 (2016) 345–349
• $SU(5)$-inspired double beta decay
  Renato Fonseca, Martin Hirsch
Physical Review D 92, 015014 (2015)
• On the chirality of the SM and the fermion content of GUTs
  Renato Fonseca
  Nuclear Physics B 897 (2015) 757-780
• Small neutrino masses and gauge coupling unification
  Sofiane Boucenna, Renato Fonseca, Félix González-Canales, and José Valle
  Physical Review D 91, 031702(R) (2015)
• Classification of lepton mixing patterns from finite flavour symmetries
  Renato Fonseca and Walter Grimus
  (Contribution to the proceedings of the ICHEP 2014 conference)
  Nuclear and Particle Physics Proceedings 273–275 (2016) 2618–2620
• Classification of lepton mixing matrices from residual symmetries
  Renato Fonseca and Walter Grimus
  JHEP 09 (2014) 033
• Renormalization in supersymmetric models
  Renato Fonseca (Ph.D. thesis — 2013)
• Renormalization group equations and matching in a general quantum field
  theory with kinetic mixing
  Renato Fonseca, Michal Malinský, and Florian Staub
  Physics Letters B 726 (2013) 882-886
• Supersymmetric $SO(10)$ GUTs with sliding scales
  Carolina Arbeláez, Renato Fonseca, Martin Hirsch, and Jorge Romão
  Physical Review D 87, 075010 (2013)
• Revisiting the $\Gamma(K\to e\nu)/\Gamma(K\to\mu\nu)$ ratio in Supersymmetric Unified Models
  Renato Fonseca, Jorge Romão, and Ana Teixeira
  The European Physical Journal C 72 (2012) 2228
• Running soft parameters in SUSY models with multiple U(1) gauge factors
  Renato Fonseca, Michal Malinský, Werner Porod, and Florian Staub
  Nuclear Physics B 854 (2012) 28
  J. Phys. Conf. Ser. 447 012034 (2013)       (contribution to the DISCRETE 2012 symposium)
• Calculating the renormalisation group equations of a SUSY model with Susyno
  Renato Fonseca
  Computer Physics Communications 183 (2012) 2298
• Discrete Family Symmetries and Tri-Bimaximal Leptonic Mixing
  Renato Fonseca (Master's thesis — 2008)
  

Academic programs

• Susyno
  Susyno is a Mathematica package which calculates the 2-loop renormalisation group equations of supersymmetric models, based on any gauge group and with any field content. To accomplish this, Susyno contains several group theoretical functions which may be useful on their own. For example, it can calculate the dimension, the Casimir or even the explicit matrices in some basis of a Lie group representation (various examples can be found here ).
• Sym2Int
  Sym2Int is a Mathematica package which lists all valid interactions given a model's gauge group and fields. The fields are specified by their gauge and Lorentz transformation properties.

Non-academic things

• The Mandelbrot set
  The Mandelbrot set is a famous mathematical object which gives nice pictures and is very easy to code. This page contains a small Javascript program which I created just for fun, and there is also a laid-back discussion of some basic features of this curious object (note: if you can, use Google Chrome to view this page, because it runs Javascript faster).

Contact Information

Author
Renato Fonseca

Email
renato.fonseca@ific.uv.es

Last updated
30 May 2017