May 31, 2023 to June 2, 2023
Europe/Zurich timezone

Testing Grand Unified Theories with gravitational waves and proton decay

Jun 2, 2023, 11:45 AM
500/1-001 - Main Auditorium (CERN)

500/1-001 - Main Auditorium


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gravitational waves Gravitational Waves


LUCA MARSILI (IPPP, University of Durham)


We consider a minimal non-supersymmetric SO(10) Grand Unified Theory (GUT) model that can reproduce the observed fermionic masses and mixing parameters of the Standard Model. We calculate the scales of spontaneous symmetry breaking from the GUT to the Standard Model gauge group using two-loop renormalisation group equations. This procedure determines the proton decay rate and the scale of U(1)_B-L breaking, which generates cosmic strings and the right-handed neutrino mass scales. Consequently, the regions of parameter space where thermal leptogenesis is viable are identified and correlated with the fermion masses and mixing, the neutrinoless double beta decay rate, the proton decay rate, and the gravitational wave signal resulting from the network of cosmic strings. We demonstrate that this framework, which can explain the Standard Model fermion masses and mixing and the observed baryon asymmetry, will be highly constrained by the next generation of gravitational wave detectors and neutrino oscillation experiments which will also constrain the proton lifetime.

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Primary authors

Bowen Fu (University of Southampton) JESSICA TURNER LUCA MARSILI (IPPP, University of Durham) Silvia Pascoli (Universita e INFN, Bologna (IT)) Stephen Frederick King (University of Southampton) Prof. Yeling Zhou (UCAS)

Presentation materials