36 research outputs found
Electromgnetic-gravitational cross-sections in external elctromagnetic fields
The classical processes: the conversion of photons into gravitons in the
static electromagnetic fields are considered by using Feynman perturbation
techniques. The differential cross sections are presented for the conversion in
the electric field of the flat condesor and the magnetic field of the selenoid.
A numerical evaluation shows that the cross sections may have the observable
value in the present technical scenario.Comment: 11 pages, LATEX, no figure
Axion in a 3-3-1 Model with Right-handed Neutrinos
We  show that Peccei - Quinn(PQ) symmetry can be a natural outcomein the 3-3-1 model with right neutrinos after imposing a symmetry. This symmetry is suitableaccommodated in this model when we augmented its spectrum byincluding a singlet scalar field with large VEV. After breakingthe PQ symmetry yielding the axion we study the decay of axioninto two photons. The result shows that the lifetime of axion isvery long, therefore the axion can play the role of the latedecaying particle(LDP) in a dark matter and it is stable in ouruniverse
The influence of scalar unparticle on the production of multiple photons in the Randall- Sundrum model
The influence of scalar unparticle on the production of multiple photons in
the Randall- Sundrum model at muon colliders with the center of mass energy
TeV is evaluated in detail. The results indicate that the
total cross-sections depend strongly on the polarization of the muon and
antimuon beams, the collision energy , the scaling dimension
of the unparticle operator and the energy scale
. Numerical evaluation shows that the cross - sections for the
production of four - photons at the final state are much larger than the
associated production of two - photons with the unparticle under the same
conditions.Comment: 13 figures, 1 table. arXiv admin note: text overlap with
arXiv:1807.0045
Production Cross Sections of Axion in a Static Electromagnetic Field
Photon - axion conversions in staticelectromagnetic fields of the size areconsidered in detail by the Feynman diagram methods. Thedifferential cross sections are presented and the numericalevaluations of the total cross section are given. Our result showsthat the conversion cross-sections in the electric field are quitesmall, while in the strong magnetic field, the cross-sections are much enhanced, which can be measurable in current experiments.Photon - axion conversions in staticelectromagnetic fields of the size areconsidered in detail by the Feynman diagram methods. The differential cross sections are presented and the numerical evaluations of the total cross section are given. Our result shows that the conversion cross-sections in the electric field are quite small, while in the strong magnetic field, the cross-sections are much enhanced, which can be measurable in current experiments
Anomalous magnetic moment of muon in 3-3-1 models
A contribution from new gauge bosons in the (3 - 3 - 1) models to the anomalous magnetic moments of the
muon is calculated and numerically estimated. In the minimal 3 - 3 - 1 model, a
lower bound on the bilepton mass at a value of 167 GeV is derived. For an
expected precision() of the BNL measurements the
possible lower bounds on masses of the bileptons in the minimal version and in
the version with right-handed neutrinos are around 940 GeV and 250 GeV,
respectively.Comment: Latex, 11 pages, 4 figures, axodraw.sty used. To appear in Phys.
Lett.
Higgs-gauge boson interactions in the economical 3-3-1 model
Interactions among the standard model gauge bosons and scalar fields in the
framework of SU(3)_C X SU(3)_L X U(1)_X gauge model with minimal (economical)
Higgs content are presented. From these couplings, all scalar fields including
the neutral scalar and the Goldstone bosons can be identified and their
couplings with the usual gauge bosons such as the photon, the charged
and the neutral , without any additional condition, are recovered. In the
effective approximation, full content of scalar sector can be recognized. The
CP-odd part of Goldstone associated with the neutral non-Hermitian bilepton
gauge boson is decouple, while its CP-even counterpart has the mixing
by the same way in the gauge boson sector. Masses of the new neutral Higgs
boson and the neutral non-Hermitian bilepton are dependent on a
coefficient of Higgs self-coupling (). Similarly, masses of the
singly-charged Higgs boson and of the charged bilepton are
proportional through a coefficient of Higgs self-interaction (). The
hadronic cross section for production of this Higgs boson at the LHC in the
effective vector boson approximation is calculated. Numerical evaluation shows
that the cross section can exceed 260 .Comment: 22 pages, 1 figure, submitted to Phys. Rev.