Speaker
Benoit Assi
Description
Within a chiral SU(15) gauge theory in which the Standard Model fermions are bound states of massless preons, we show that proton-decay operators are likely induced at the compositeness scale, $\Lambda_{\rm{pre}}$. Our estimate of the limit imposed by searches for proton decays is $\Lambda_{\rm{pre}}>10^4$ TeV, dependent on an 8-prebaryon operator induced by SU(15) dynamics and the mass of a composite vectorlike quark. The latter has a lower limit related to the mass of a composite vectorlike lepton, which in turn is required by LHC searches to be above 1 TeV. We point out that exotic proton decay modes, into a $\pi^+$ and a heavy right-handed neutrino, could be observed using the Super-Kamiokande or DUNE detectors.
Authors
Benoit Assi
Bogdan Dobrescu
(Fermilab)
