14,693 research outputs found
A 3-3-1 model with right-handed neutrinos based on the family symmetry
We present the first multiscalar singlet extension of the 3-3-1 model with
right-handed neutrinos, based on the family
symmetry, supplemented by the flavor group,
consistent with current low energy fermion flavor data. In the model under
consideration, the light active neutrino masses are generated from a double
seesaw mechanism and the observed pattern of charged fermion masses and quark
mixing angles is caused by the breaking of the discrete group at very high energy. Our model
has only 14 effective free parameters, which are fitted to reproduce the
experimental values of the 18 physical observables in the quark and lepton
sectors. The obtained physical observables for the quark sector agree with
their experimental values, whereas those ones for the lepton sector also do,
only for the inverted neutrino mass hierarchy. The normal neutrino mass
hierarchy scenario of the model is disfavored by the neutrino oscillation
experimental data. We find an effective Majorana neutrino mass parameter of
neutrinoless double beta decay of 22 meV, a leptonic Dirac
CP violating phase of and a Jarlskog invariant of about
for the inverted neutrino mass spectrum.Comment: 22 pages. Final version published in European Physical Journal C.
arXiv admin note: text overlap with arXiv:1601.03300, arXiv:1309.656
Topological gravitation on graph manifolds
A model of topological field theory is presented in which the vacuum coupling
constants are topological invariants of the four-dimensional spacetime. Thus
the coupling constants are theoretically computable, and they indicate the
topological structure of our universe.Comment: 3 pages, a talk delivered at the 11th Marcel Grossmann Meeting (2006
Guaranteed emergence of genuine entanglement in 3-qubit evolving systems
Multipartite entanglement has been shown to be of particular relevance for a
better understanding and exploitation of the dynamics and flow of entanglement
in multiparty systems. This calls for analysis aimed at identifying the
appropriate processes that guarantee the emergence of multipartite entanglement
in a wide range of scenarios. Here we carry on such analysis considering a
system of two initially entangled qubits, one of which is let to interact with
a third qubit according to an arbitrary unitary evolution. We establish
necessary and sufficient conditions on the corresponding Kraus operators, to
discern whether the evolved state pertains to either one of the classes of
3-qubit pure states that exhibit some kind of entanglement, namely biseparable,
W-, and GHZ- genuine entangled classes. Our results provide a classification of
the Kraus operators according to their capacity of producing 3-qubit
entanglement, and pave the way for extending the analysis to larger systems and
determining the particular interactions that must be implemented in order to
create, enhance and distribute entanglement in a specific manner.Comment: Two new subsections included. Accepted for publication in The
European Physical Journal
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