CPT Student Seminar: One Scale to Rule Them All: Dark Matter and Leptogenesis via Classical Scale Invariance
16 May 2016 17:00 in OC218
In this work we study a classically scale invariant extension of the Standard Model that can explain simultaneously dark matter (DM) and the baryon asymmetry in the universe (BAU). In our set-up we introduce a dark sector, namely a non-Abelian SU(2)_DM hidden sector that is coupled to the SM via the Higgs portal, and a singlet sector with a real singlet sigma and three right-handed Majorana neutrinos N_i. Due to a custodial symmetry all three gauge bosons Z'^a have the same mass and are absolutely stable, making them suitable dark matter candidates. The lepton flavour asymmetry is produced during CP-violating oscillations of the right-handed neutrinos, which have masses of a few GeVs. All the scales in the theory are dynamically generated and related to each other via scalar portal couplings.
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A gathering of mathematicians from the CPT group with physicists from IPPP, we meet to discuss our work in a relaxed and friendly environment.
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