TY  - JOUR
AU  - Caputo, A.
AU  - Hernandez, P.
AU  - Lopez-Pavon, J.
AU  - Salvado, J.
PY  - 2017
DA  - 2017//
TI  - The seesaw portal in testable models of neutrino masses
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 112
EP  - 20pp
VL  - 06
IS  - 6
PB  - Springer
KW  - Beyond Standard Model
KW  - Neutrino Physics
AB  - A Standard Model extension with two Majorana neutrinos can explain the measured neutrino masses and mixings, and also account for the matter-antimatter asymmetry in a region of parameter space that could be testable in future experiments. The testability of the model relies to some extent on its minimality. In this paper we address the possibility that the model might be extended by extra generic new physics which we parametrize in terms of a low-energy effective theory. We consider the effects of the operators of the lowest dimensionality, d = 5, and evaluate the upper bounds on the coefficients so that the predictions of the minimal model are robust. One of the operators gives a new production mechanism for the heavy neutrinos at LHC via higgs decays. The higgs can decay to a pair of such neutrinos that, being long-lived, leave a powerful signal of two displaced vertices. We estimate the LHC reach to this process.
SN  - 1029-8479
UR  - http://arxiv.org/abs/1704.08721
UR  - https://doi.org/10.1007/JHEP06(2017)112
DO  - 10.1007/JHEP06(2017)112
LA  - English
N1  - WOS:000404625300005
ID  - Caputo_etal2017
ER  -