6 papers
and the baryon asymmetry of the universe
Carolina Arbeláez, Juan Carlos Helo, Martin Hirsch +1
The observed baryon asymmetry (BAU) of the universe puts strong constraints on any -violating interaction. An observation of a -violating nucleon decay channel would…
Invisible neutron decay and light BSM particles
J. C. Helo, M. Hirsch, T. Ota
In Standard Model Effective Field Theory (SMEFT), invisible neutron decay arises from d = 12 operators. Adding new light particles to the field content of the SM, such as right-han…
Type I + II Seesaw Model in light of the New Neutrino Oscillation Measurements
Maria Aguilar, Juan Carlos Helo, Toshihiko Ota +3
Global analysis of neutrino oscillation data slightly favors normal mass ordering. In this work, we investigate an extended scalar sector that naturally gives rise to a type I + II…
Searching for long-lived light neutralinos from -meson decays with baryonic R-parity violation at Belle II
Emilie Bertholet, Claudio O. Dib, Sara P. Gandelman +6
In a supersymmetry scenario with R-parity violation (RPV), neutralinos with GeV-scale mass, which are necessarily bino-like, are allowed by all constraints and can be produced in a…
Probing light neutralinos from pair-produced sleptons with displaced vertices at the high-luminosity LHC
Giovanna Cottin, Juan Carlos Helo, Fabián Hernández-Pinto +2
We study light neutralinos () with masses ranging from 10 GeV to several hundred GeV within the framework of R-parity-violating (RPV) supersymmetry. These light neut…
Long-lived particle phenomenology in one-loop neutrino mass models with dark matter
Carolina Arbeláez, Giovanna Cottin, Juan Carlos Helo +2
Neutrino masses and dark matter (DM) might have a common origin. The scotogenic model can be considered the proto-type model realizing this idea, but many other variants exist. In…