25 research outputs found
Localization of abelian gauge fields on thick branes
In this work, we explore a mechanism for abelian gauge field localization on
thick branes based on a five-dimensional Stueckelberg-like action. A
normalizable zero mode is found through the identification of a suitable
coupling function between the brane and the gauge field. The same mechanism is
studied for the localization of the abelian Kalb--Ramond field
Renormalization of a model for spin-1 matter fields
In this work, the one-loop renormalization of a theory for fields
transforming in the representation of the Homogeneous
Lorentz Group is studied. The model includes an arbitrary gyromagnetic factor
and self-interactions of the spin 1 field, which has mass dimension one. The
model is shown to be renormalizable for any value of the gyromagnetic factor.Comment: 15 pages, 9 figure
Electroweak phase transition in a model with gauged lepton number
In this work we study the electroweak phase transition in a model with gauged
lepton number. Here, a family of vector-like leptons is required in order to
cancel the gauge anomalies. Furthermore, these leptons can play an important
role in the transition process. We find that this framework is able to provide
a strong transition, but only for a very limited number of cases.Comment: 14 pages, 5 figures, matches published versio
Quantization of Second Order Fermions
The quantization of a massive spin field that satisfies the
Klein-Gordon equation is studied. The framework is consistent, provided it is
formulated as a pseudo-hermitian quantum field theory by the redefinition of
the field dual and the identification of an operator that modifies the internal
product of states in Hilbert space to preserve a real energy spectrum and
unitary evolution. Since the fermion field has mass dimension one, the theory
admits renormalizable fermion self-interactions.Comment: 4 page
Simple theory for scotogenic dark matter with residual matter-parity
Dark matter stability can result from a residual matter-parity symmetry
surviving spontaneous breaking of an extended gauge symmetry. We propose the
simplest scotogenic dark matter completion of the original SVS theory
(Phys.Rev. D22 (1980) 738), in which the "dark sector" particles as well as
matter-parity find a natural theoretical origin in the model. We briefly
comment on its main features.Comment: 14 pages, 2 figures. Matches published version in PL
Flavour and CP predictions from orbifold compactification
We propose a theory for fermion masses and mixings in which an family
symmetry arises naturally from a six-dimensional spacetime after orbifold
compactification. The flavour symmetry leads to the successful "golden"
quark-lepton unification formula. The model reproduces oscillation parameters
with good precision, giving sharp predictions for the CP violating phases of
quarks and leptons, in particular . The
effective neutrinoless double-beta decay mass parameter is also sharply
predicted as .Comment: 11 pages, 3 figures. v2: matches published version. Note title chang