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Search: authors:"Seungwon Baek"

5 papers found.
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Scalar dark matter search from the extended νTHDM

Abstract We consider a neutrino Two Higgs Doublet Model (νTHDM) in which neutrinos obtain naturally small Dirac masses from the soft symmetry breaking of a global U(1) X symmetry. We extended the model so the soft term is generated by the spontaneous breaking of U(1) X by a new scalar field. The symmetry breaking pattern can also stabilize a scalar dark matter candidate. After...

Dark matter physics in neutrino specific two Higgs doublet model

Although the seesaw mechanism is a natural explanation for the small neutrino masses, there are cases when the Majorana mass terms for the right-handed neutrinos are not allowed due to symmetry. In that case, if neutrino-specific Higgs doublet is introduced, neutrinos become Dirac particles and their small masses can be explained by its small VEV. We show that the same symmetry...

Flavor-changing Higgs decays in grand unification with minimal flavor violation

We consider the flavor-changing decays of the Higgs boson in a grand unified theory framework which is based on the SU(5) gauge group and implements the principle of minimal flavor violation. This allows us to explore the possibility of connecting the tentative hint of the Higgs decay \(h\rightarrow \mu \tau \) recently reported in the CMS experiment to potential new physics in...

3.5 keV X-ray line signal from dark matter decay in local U(1) B−L extension of Zee-Babu model

We consider a local U(1) B−L extension of Zee-Babu model to explain the recently observed 3.5 keV X-ray line signal. The model has three Standard model (SM)-singlet Dirac fermions with different U(1) B−L charges. A complex scalar field charged under U(1) B−L is introduced to break the U(1) B−L symmetry. After U(1) B−L symmetry breaking a remnant discrete symmetry stabilizes the...

Can Zee-Babu model implemented with scalar dark matter explain both Fermi-LAT 130 GeV γ-ray excess and neutrino physics?

AbstractWe extend the Zee-Babu model for the neutrino masses and mixings by first incorporating a scalar dark matter X with Z 2 symmetry and then X and a dark scalar φ with global U(1) symmetry. In the latter scenario the singly and doubly charged scalars that are new in the Zee-Babu model can explain the large annihilation cross section of a dark matter pair into two photons as...