724 citations · 5.8k across the 123 of their papers we have counts for
5 papers · 1 filter
Emergent/Composite axions
Pascal Anastasopoulos, Panagiotis Betzios, Massimo Bianchi +2
Hidden theories coupled to the SM may provide emergent axions, that are composites/bound-states of the hidden fields. This is motivated by paradigms emerging from the AdS/CFT corre…
Exotic see-saw mechanism for neutrinos and leptogenesis in a Pati-Salam model
Andrea Addazi, Massimo Bianchi, Giulia Ricciardi
We discuss non-perturbative corrections to the neutrino sector, in the context of a D-brane Pati-Salam-like model, that can be obtained as a simple alternative to GUT's in…
Neutron Majorana mass from Exotic Instantons in a Pati-Salam model
Andrea Addazi, Massimo Bianchi
We show how exotic stringy instantons can generate an effective interaction between color diquark sextets in a Pati-Salam model, inducing a Majorana mass term for the neutron. In p…
Un-oriented Quiver Theories for Majorana Neutrons
Andrea Addazi, Massimo Bianchi
In the context of un-oriented open string theories, we identify quivers whereby a Majorana mass for the neutron is indirectly generated by exotic instantons. We discuss two classes…
Neutron Majorana mass from exotic instantons
Andrea Addazi, Massimo Bianchi
We show how a Majorana mass for the Neutron could result from non-perturbative quantum gravity effects peculiar to string theory. In particular, "exotic instantons" in un-oriented…