TY - JOUR
T1 - Supersymmetric Higgs-portal and X-ray lines
AU - Lee, Hyun Min
AU - Park, Chan Beom
AU - Park, Myeonghun
N1 - Publisher Copyright:
© 2015 The Authors.
PY - 2015/5/1
Y1 - 2015/5/1
N2 - We consider a Dirac singlet fermion as thermal dark matter for explaining the X-ray line in the context of a supersymmetric Higgs-portal model or a generalized Dirac NMSSM. The Dirac singlet fermion gets a mass splitting due to their Yukawa couplings to two Higgs doublets and their superpartners, Higgsinos, after electroweak symmetry breaking. We show that a correct relic density can be obtained from thermal freeze-out, due to the co-annihilation with Higgsinos for the same Yukawa couplings. We discuss the phenomenology of the Higgsinos in this model such as displaced vertices at the LHC.
AB - We consider a Dirac singlet fermion as thermal dark matter for explaining the X-ray line in the context of a supersymmetric Higgs-portal model or a generalized Dirac NMSSM. The Dirac singlet fermion gets a mass splitting due to their Yukawa couplings to two Higgs doublets and their superpartners, Higgsinos, after electroweak symmetry breaking. We show that a correct relic density can be obtained from thermal freeze-out, due to the co-annihilation with Higgsinos for the same Yukawa couplings. We discuss the phenomenology of the Higgsinos in this model such as displaced vertices at the LHC.
UR - http://www.scopus.com/inward/record.url?scp=84926321540&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2015.03.046
DO - 10.1016/j.physletb.2015.03.046
M3 - Article
AN - SCOPUS:84926321540
SN - 0370-2693
VL - 744
SP - 218
EP - 224
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -