22-26 October 2018
Hotel Intourist Kolomenskoye 4*
Europe/Moscow timezone

SMASH model and atmospheric neutrino mass splitting

24 Oct 2018, 17:30
Alekseevskiy hall (Hotel Intourist Kolomenskoye 4*)

Alekseevskiy hall

Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Plenary/section talk Particle physics: hep theory Particle Physics: HEP theory


Dr. Chitta Ranjan Das (Bogoliubov Laboratory of Theoretical Physics)


Five fundamental problems - neutrino oscillations, baryogenesis, dark matter, inflation, strong CP problem - are solved at one stroke in a model, dubbed as "SM-A-S-H" (Standard Model-Axion-Seesaw-Higgs portal inflation) by Andreas Ringwald et. al. The Standard Model (SM) particle content is extended by three right-handed SM-singlet neutrinos $N_i$, a vector-like color triplet quark $Q$, a complex SM-singlet scalar field $\sigma$ that stabilises the Higgs potential, all of them being charged under a global lepton number (hyper-charge) and Peccei-Quinn (PQ) $U(1)$ symmetry, the vacuum expectation value $v_\sigma \sim 10^{11}$ GeV breaks the lepton number and the Peccei-Quinn symmetry simultaneously. We found that numerically SMASH model not only solves five fundamental problems but also the sixth problem "Vacuum Metastability" through the extended scalar sector and can predict approximately correct atmospheric neutrino mass splitting around 0.05 eV.

Primary author

Dr. Chitta Ranjan Das (Bogoliubov Laboratory of Theoretical Physics)


Prof. Katri Huitu (Helsinki Institute of Physics) Dr. Timo Kärkkäinen (Department of Physics)

Presentation Materials

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