Digesh Raut

Inflection-point inflation in a hyper-charge oriented U(1)X model

Inflection-point inflation is an interesting possibility to realize a successful slow-roll inflation when inflation is driven by a single scalar field with its value during inflation below the Planck mass (

SU(5)×U(1)X grand unification with minimal seesaw and Z′-portal dark matter

\phi_I \lesssim M_{Pl}

Inflection-point B-L Higgs inflation

). In order for a renormalization group (RG) improved effective

Displaced vertex signature of type-I seesaw

\lambda \phi^4

Heavy Majorana neutrino pair productions at the LHC in minimal U(1) extended Standard Model

potential to develop an inflection-point, the running quartic coupling

Running non-minimal inflation with stabilized inflaton potential

\lambda(\phi)

Nonminimal quartic inflation in classically conformal U ( 1 ) X extended standard model

must exhibit a minimum with an almost vanishing value in its RG evolution, namely

Enhanced pair production of heavy Majorana neutrinos at the LHC

\lambda(\phi_I) \simeq 0

Domain-Wall Standard Model and LHC

and

Aspects of Domain-Wall Standard Model

\beta_{\lambda}(\phi_I) \simeq 0