  We perform a phenomenological analysis of the observable consequences on the
extended scalar sector of the SMASH (Standard Model - Axion - Seesaw - Higgs
portal inflation) framework. We solve the vacuum metastability problem in a
suitable region of SMASH scalar parameter spaces and discuss the one-loop
correction to triple Higgs coupling $\lambda_{HHH}$. We also find that the
correct neutrino masses and mass squared differences and baryonic asymmetry of
the universe can arise from this model and consider running of the Yukawa
couplings of the model. In fact, we perform a full two-loop renormalization
group analysis of the SMASH model.
