4,193 research outputs found
A supersymmetric 3-3-1 model
We build the complete supersymmetric version of a 3-3-1 gauge model using the
superfield formalism. We point out that a discrete symmetry, similar to the
R-symmetry in the minimal supersymmetric standard model, is possible to be
defined in this model. Hence we have both R-conserving and R-violating
possibilities. Analysis of the mass spectrum of the neutral real scalar fields
shown that in this model the lightest scalar Higgs has a mass upper limit, and
at the tree level it is 124.5 GeV for a given illustrative set of parameters.Comment: RevTex, extended and revised version, 20 pages, one eps figur
Left-right asymmetries and exotic vector-boson discovery in lepton-lepton colliders
By considering left-right (L-R) asymmetries we study the capabilities of
lepton colliders in searching for new exotic vector bosons. Specifically we
study the effect of a doubly charged bilepton boson and an extra neutral vector
boson appearing in a 3-3-1 model on the L-R asymmetries for the processes
, and and
show that these asymmetries are very sensitive to these new contributions and
that they are in fact powerful tools for discovery this sort of vector bosons.Comment: RevTeX, 22 pages, 12 eps figure
Supersymmetric 3-3-1 model with right-handed neutrinos
We consider the supersymmetric extension of the 3-3-1 model with right-handed
neutrinos. We study the mass spectra in the scalar and pseudoscalar sectors,
and for a given set of the input parameters, we find that the lightest scalar
in the model has a mass of 130 GeV and the lightest pseudoscalar has mass of 5
GeV. However, this pseudoscalar decouples from the at high energy scales
since it is almost a singlet under .Comment: Revtex4, 16 pages, no figure
Soft CP violation in K-meson systems
We consider a model with soft CP violation which accommodate the CP violation
in the neutral kaons even if we assume that the Cabibbo-Kobayashi-Maskawa
mixing matrix is real and the sources of CP violation are three complex vacuum
expectation values and a trilinear coupling in the scalar potential. We show
that for some reasonable values of the masses and other parameters the model
allows to explain all the observed CP violation processes in the
- system.Comment: 19 pages, RevTeX 4. Minor modification
Hydrodynamic Character of the Non-equipartition of Kinetic Energy in Binary Granular Gases
The influence of the heating mechanism on the kinetic energy densities of the
components of a vibrated granular mixture is investigated. Collisions of the
particles with the vibrating wall are inelastic and characterized by two
coefficients of normal restitution, one for each of the two species. By means
of molecular dynamics simulations, it is shown that the non-equipartition of
kinetic energy is not affected by the differential mechanism of energy
injection, aside the usual boundary layer around the wall. The macroscopic
state of the mixture in the bulk is defined by intensive variables that do not
include the partial granular temperatures of the components
Sulphur abundance determinations in star-forming regions-I: Ionization Correction Factor
In the present work we used a grid of photoionization models combined with
stellar population synthesis models to derive reliable Ionization Correction
Factors (ICFs) for the sulphur in star-forming regions. These models cover a
large range of nebular parameters and yielding ionic abundances in consonance
with those derived through optical and infrared observational data of
star-forming regions. From our theoretical ICFs, we suggested an {\alpha} value
of 3.27 in the classical Stasinska formulae. We compared the total sulphur
abundance in the gas phase of a large sample of objects by using our
Theoretical ICF and other approaches. In average, the differences between the
determinations via the use of the different ICFs considered are similar to the
uncertainties in the S/H estimations. Nevertheless, we noted that for some
objects it could reach up to about 0.3 dex for the low metallicity regime.
Despite of the large scatter of the points, we found a trend of S/O ratio to
decrease with the metallicity, independently of the ICF used to compute the
sulphur total abundance.Comment: Accepted for publication in MNRAS, 21 pages, 8 figures, 5 table
Large magnetic dipole moments for neutrinos with arbitrary masses
We show that there is a general sort of models in which it is possible to
have large magnetic dipole moments for neutrinos while keeping their masses
arbitrarily small. Some examples of these models are considered.Comment: REVTEX, 8 pages, 2 .eps figure
Towards an Unsupervised Speaking Style Voice Building Framework:Multi-Style Speaker Diarization
L-R asymmetries and signals for new bosons
Several left-right parity violating asymmetries in lepton-lepton scattering
in fixed target and collider experiments are considered as signals for doubly
charged vector bosons (bileptons).Comment: Revtex, 7 pages, one .eps figure. Contribution to the VIII Mexican
School of Particles and Fields, Oaxaca de Ju\'arez, Oax, M\'exico, November
20--29, 199
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