PT Journal
AU De Romeri, V
   Fernandez-Martinez, E
   Gehrlein, J
   Machado, PAN
   Niro, V
TI Dark Matter and the elusive Z' in a dynamical Inverse Seesaw scenario
SO Journal of High Energy Physics
JI J. High Energy Phys.
PY 2017
BP 169
EP 21pp
VL 10
IS 10
DI 10.1007/JHEP10(2017)169
LA English
DE Beyond Standard Model; Neutrino Physics
AB The Inverse Seesaw naturally explains the smallness of neutrino masses via an approximate B-L symmetry broken only by a correspondingly small parameter. In this work the possible dynamical generation of the Inverse Seesaw neutrino mass mechanism from the spontaneous breaking of a gauged U(1) B-L symmetry is investigated. Interestingly, the Inverse Seesaw pattern requires a chiral content such that anomaly cancellation predicts the existence of extra fermions belonging to a dark sector with large, non-trivial, charges under the U(1) B-L. We investigate the phenomenology associated to these new states and find that one of them is a viable dark matter candidate with mass around the TeV scale, whose interaction with the Standard Model is mediated by the Z' boson associated to the gauged U(1) B-L symmetry. Given the large charges required for anomaly cancellation in the dark sector, the B-L Z' interacts preferentially with this dark sector rather than with the Standard Model. This suppresses the rate at direct detection searches and thus alleviates the constraints on Z'-mediated dark matter relic abundance. The collider phenomenology of this elusive Z' is also discussed.
ER