Advanced search    

Search: authors:"Eung Jin Chun"

6 papers found.
Use AND, OR, NOT, +word, -word, "long phrase", (parentheses) to fine-tune your search.

Di-Higgs signatures from R-parity violating supersymmetry as the origin of neutrino mass

Motivated by the naturalness and neutrino mass generation, we study a bilinear R-parity violating supersymmetric scenario with a light Higgsino-like lightest super-symmetric particle (LSP). We observe that the LSP can have substantial decay branching ratio to νh in a large part of the parameter space, and thus study the pair production of electroweakinos followed by the decays \( ...

Very Degenerate Higgsino Dark Matter

We present a study of the Very Degenerate Higgsino Dark Matter (DM), whose mass splitting between the lightest neutral and charged components is \( \mathcal{O}(1) \) MeV, much smaller than radiative splitting of 355 MeV. The scenario is realized in the minimal supersymmetric standard model by small gaugino mixings. In contrast to the pure Higgsino DM with the radiative splitting ...

Leptonic precision test of leptophilic two-Higgs-doublet model

The type X (lepton-specific) two-Higgs-doublet model at large tan β becomes leptophilic and thus allows a light pseudoscalar A accommodating the observed muon g − 2 deviation without conflicting with various hadronic constraints. On the other hand, it is strongly constrained by leptonic precision observables such as lepton universality test in the neutral and charged currents. ...

Lepton flavour violating signature in supersymmetric U(1)′ seesaw models at the LHC

We consider a U(1)′ supersymmetric seesaw model in which a right-handed sneutrino is a thermal dark matter candidate whose relic density can be in the right range due to its coupling to relatively light \( \tilde{Z}^{\prime } \), the superpartner of the extra gauge boson Z ′. Such light \( \tilde{Z}^{\prime } \) can be produced at the LHC through cascade decays of colored ...

LHC τ -rich tests of lepton-specific 2HDM for (g − 2) μ

The lepton-sepcific (or type X) 2HDM (L2HDM) is an attractive new physics candidate explaining the muon g − 2 anomaly requiring a light CP-odd boson A and large tan β. This scenario leads to τ -rich signatures, such as 3τ , 4τ and 4τ + W/Z, which can be readily accessible at the LHC. We first study the whole L2HDM parameter space to identify allowed regions of extra Higgs boson ...

Limiting two-Higgs-doublet models

We update the constraints on two-Higgs-doublet models (2HDMs) focusing on the parameter space relevant to explain the present muon g −2 anomaly, Δa μ , in four different types of models, type I, II, “lepton specific” (or X) and “flipped” (or Y). We show that the strong constraints provided by the electroweak precision data on the mass of the pseudoscalar Higgs, whose contribution ...