34,028 research outputs found
Lower Mass Bound on the mass via Neutrinoless Double Beta Decay in a 3-3-1 Model
The discovery of neutrino masses has raised the importance of studies in the
context of neutrinoless double beta decay, which constitutes a landmark for
lepton number violation. The standard interpretation is that the light massive
neutrinos, that we observed oscillating in terrestrial experiments, mediate
double beta decay. In the minimal 3-3-1 model, object of our study, there is an
additional contribution that stems from the mixing between a new charged vector
boson, , and the Standard Model W boson. Even after setting this
mixing to be very small, we show that tight constraints arise from the
non-observation of neutrinoless double beta decay. Indeed, we derive bounds on
the mass of the gauge boson that might exceed those from collider
probes, and most importantly push the scale of symmetry breaking beyond its
validity, leading to the exclusion of the minimal 3-3-1 model.Comment: 16 pages, 5 figure
Vector constants of motion for time-dependent Kepler and isotropic harmonic oscillator potentials
A method of obtaining vector constants of motion for time-independent as well
as time-dependent central fields is discussed. Some well-established results
are rederived in this alternative way and new ones obtained.Comment: 18 pages, no figures, regular Latex article forma
Collider Detection of Dark Matter Electromagnetic Anapole Moments
Dark matter that interacts with the Standard Model by exchanging photons
through higher multipole interactions occurs in a wide range of both strongly
as well as weakly coupled hidden sector models. We study the collider detection
prospects of these candidates, with a focus on Majorana dark matter that
couples through the anapole moment. The study is conducted at the effective
field theory level with the mono- signature incorporating varying levels of
systematic uncertainties at the high-luminosity LHC. The projected collider
reach on the anapole moment is then compared to the reach coming from direct
detection experiments like LZ. Finally, the analysis is applied to a weakly
coupled completion with leptophilic dark matter.Comment: 24 pages, 9 figure
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