Banca de DEFESA: JACINTO PAULO DA SILVA NETO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : JACINTO PAULO DA SILVA NETO
DATA : 08/04/2022
HORA: 14:00
LOCAL: Plataforma Google Meet
TÍTULO:

A Right-handed Neutrino Dark Matter Phenomenology

PALAVRAS-CHAVES:

Dark Matter, Right-handed Neutrino, Cosmology, Phenomenology, Relic Abundance

PÁGINAS: 133
RESUMO:

Right-handed neutrinos appear in several extensions beyond the Standard Model, specially in connection to neutrino masses.
Motivated by this, we present a model of right-handed neutrino dark matter that interacts with Standard Model particles
through a new gauge symmetry as well as via mass mixing between the new vector field and the Z boson, and investigate
different production mechanisms. We derive the dark matter relic density in the Standard Cosmological Model, when the
Hubble rate is faster than usual, when dark matter decouples in a matter domination epoch, and when it decouples in a
radiation domination regime, which is then followed by a matter domination era. The direct detection rate features a
spin-independent but velocity suppressed operators, as well as a spin-dependent operator when the mass mixing is correctly
accounted for. We put all these results into perspective with existing flavor physics, atomic parity violation, and collider
bounds. Lastly, we outline the region of parameter space in which a weak scale right-handed neutrino dark matter stands as a
viable dark matter candidate.

MEMBROS DA BANCA:
Externa à Instituição - CLARISSA MARTINS SIQUEIRA - USP
Interno - 1043096 - FARINALDO DA SILVA QUEIROZ
Externo à Instituição - PAULO SÉRGIO RODRIGUES DA SILVA - UFPB