Sommaire:

The strong CP problem, i.e. the unexplained absence of CP violation in strong interactions, can be solved by theories which spontaneously break spacetime parity. Those usually have few additional parameters and are therefore very predictive, but their landscape remains quite unexplored. I will present a construction based on a complete mirror copy of the standard model, linked to our world by colored portal fields. Those induce the partial spontaneous breaking of the color groups and yield a vanishing theta angle at low energies. The loop contributions to the latter are well under control. Although the model contains the heavy vectorlike fermions typical of parity models, the lightest BSM fields could be colored (pseudo-Goldstone) bosons.

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Pour plus d'informations, merci de contacter Frigerio M.