TY  - JOUR
AU  - Bonilla, C.
AU  - Sokolowska, D.
AU  - Darvishi, N.
AU  - Diaz-Cruz, J. L.
AU  - Krawczyk, M.
PY  - 2016
DA  - 2016//
TI  - IDMS: inert dark matter model with a complex singlet
T2  - J. Phys. G
JO  - Journal of Physics G
SP  - 065001
EP  - 39pp
VL  - 43
IS  - 6
PB  - Iop Publishing Ltd
KW  - CP violation
KW  - inert doublet model
KW  - complex singlet
AB  - We study an extension of the inert doublet model (IDM) that includes an extra complex singlet of the scalars fields, which we call the IDMS. In this model there are three Higgs particles, among them a SM-like Higgs particle, and the lightest neutral scalar, from the inert sector, remains a viable dark matter (DM) candidate. We assume a non-zero complex vacuum expectation value for the singlet, so that the visible sector can introduce extra sources of CP violation. We construct the scalar potential of IDMS, assuming an exact Z(2) symmetry, with the new singlet being Z(2)-even, as well as a softly broken U(1) symmetry, which allows a reduced number of free parameters in the potential. In this paper we explore the foundations of the model, in particular the masses and interactions of scalar particles for a few benchmark scenarios. Constraints from collider physics, in particular from the Higgs signal observed at the Large Hadron Collider with M-h approximate to 125 GeV, as well as constraints from the DM experiments, such as relic density measurements and direct detection limits, are included in the analysis. We observe significant differences with respect to the IDM in relic density values from additional annihilation channels, interference and resonance effects due to the extended Higgs sector.
SN  - 0954-3899
UR  - http://arxiv.org/abs/1412.8730
UR  - https://doi.org/10.1088/0954-3899/43/6/065001
DO  - 10.1088/0954-3899/43/6/065001
LA  - English
N1  - WOS:000376276900002
ID  - Bonilla_etal2016
ER  -