Renato Fonseca
About me
I am currently (2018–) a postdoctoral fellow at the Institute for Particle and Nuclear Physics, Faculty of Mathematics and Physics, Charles University in Prague.
Previously (2013–2018) I was a postdoctoral fellow at the AHEP group , in the Instituto de Física Corpuscular (Valencia).
I did my Ph.D. (2009–2013) at CFTP, a research center of Instituto Superior Técnico, in Lisbon, under the supervision of Jorge C. Romão and Ana M. Teixeira.
Research areas:
- Neutrino mass models, lepton number violation and associated phenomenology (neutrinoless double beta decay and collider signatures)
- Grand unified theories
- Flavour symmetries
- Computer tools for model building
- ...
Publications
- Neutrino masses beyond the minimal seesaw
Ricardo Cepedello, Renato Fonseca and Martin Hirsch
(Contribution to the proceedings of the TAUP 2019 conference)
- Enumerating the operators of an effective field theory
Renato Fonseca
(to appear on Physical Review D)
- Violation of lepton number in 3 units
Renato Fonseca
(Contribution to the proceedings of the DISCRETE 2018 symposium)
- Systematic classification of three-loop realizations of the Weinberg operator
Ricardo Cepedello, Renato Fonseca and Martin Hirsch
JHEP 10 (2018) 197;
Erratum: JHEP 06 (2019) 034
Supplementary data can be found here
- High-dimensional neutrino masses
Gaetana Anamiati, Oscar Castillo-Felisola, Renato Fonseca, Juan Carlos Helo and Martin Hirsch
JHEP 12 (2018) 066
Supplementary data can be found here
- $\Delta L\geq 4$ processes
Renato Fonseca and Martin Hirsch
Physical Review D 98, 015035 (2018)
Supplementary data can be found here
- $\Delta L=3$ processes: Proton decay and the LHC
Renato Fonseca, Martin Hirsch and Rahul Srivastava
Physical Review D 97, 075026 (2018)
- Quasi Dirac neutrino oscillations
Gaetana Anamiati, Renato Fonseca and Martin Hirsch
Physical Review D 97, 095008 (2018)
- The Sym2Int program: going from symmetries to interactions
Renato Fonseca
J. Phys. Conf. Ser. 873 (2017) 012045
(More information on this computer code can be found here)
- Gauge vectors and double beta decay
Renato Fonseca and Martin Hirsch
Physical Review D 95, 035033 (2017)
- Lepton number violation in 331 models
Renato Fonseca and Martin Hirsch
Physical Review D 94, 115003 (2016)
- 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
(More information on this computer code can be found here)
- Discrete Family Symmetries and Tri-Bimaximal Leptonic Mixing
Renato Fonseca (Master's thesis — 2008)
Computational tools for model building
- 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 (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.
Supplementary research data
As part of some research projects, it is often useful to share additional information which cannot be included in the printed article (long lists, data files, and so on):
- "$\Delta L\geq 4$ processes", 1804.10545 [hep-ph]
The full list of operators which violate lepton number in four units can be found here
.
- "High-dimensional neutrino masses", 1806.072645 [hep-ph]
The full list of tree diagrams implementing the d=9,11,13 neutrino mass operators $LLHH(HH^*)^{(d-5)/2}$ can be found here .
- "Systematic classification of three-loop realizations of the Weinberg operator", 1807.00629 [hep-ph]
A list of the topologies and diagrams which are relevant for the 3-loop realization of the Weinberg operator $LLHH$ can be found here .
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).
- Astronomy: observing Pluto from home
Is the dwarf planet Pluto observable from an apartment in a big city like Prague?
Contact Information
Address: |
Institute of Particle and Nuclear Physics Faculty of Mathematics and Physics, Charles University V Holešovickách 2, 18000 Prague 8, Czech Republic |
Telephone: |
(+420) 221 912 482 |
Emails: |
renatofonseca@gmail.com fonseca@ipnp.mff.cuni.cz |
Author
Renato Fonseca
Emails
renatofonseca@gmail.com
or
fonseca@ipnp.mff.cuni.cz
Last updated
08 April 2020