TY  - JOUR
AU  - Fontes, D.
AU  - Romao, J. C.
AU  - Valle, J. W. F.
PY  - 2019
DA  - 2019//
TI  - Electroweak breaking and Higgs boson profile in the simplest linear seesaw model
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 245
EP  - 28pp
VL  - 10
IS  - 10
PB  - Springer
KW  - Beyond Standard Model
KW  - Higgs Physics
KW  - Neutrino Physics
AB  - We examine the simplest realization of the linear seesaw mechanism within the Standard Model gauge structure. Besides the standard scalar doublet, there are two lepton-number-carrying scalars, a nearly inert SU(2)(L) doublet and a singlet. Neutrino masses result from the spontaneous violation of lepton number, implying the existence of a Nambu-Goldstone boson. Such "majoron" would be copiously produced in stars, leading to stringent astrophysical constraints. We study the profile of the Higgs bosons in this model, including their effective couplings to the vector bosons and their invisible decay branching ratios. A consistent electroweak symmetry breaking pattern emerges with a compressed spectrum of scalars in which the "Standard Model" Higgs boson can have a sizeable invisible decay into the invisible majorons.
SN  - 1029-8479
UR  - https://arxiv.org/abs/1908.09587
UR  - https://doi.org/10.1007/JHEP10(2019)245
DO  - 10.1007/JHEP10(2019)245
LA  - English
N1  - WOS:000495737300001
ID  - Fontes_etal2019
ER  -