Direct generation of a Majorana mass for the neutron from exotic instantons

Abstract

4 To realize these experiments with suppressed magnetic fields is necessary in order to not suppress n−n oscillations. For example, the Earth magnetic field (0.5 Gauss) will split the energies of neutron and antineutron of 2µnB E 10 −11 eV. This energy is 10 12 higher than the present limit on the Majorana mass for the neutron (δmnn < 10 −23 eV 10 −8 s −1 ).

Exotic see-saw mechanism for neutrinos and leptogenesis in a Pati-Salam model

“…Color scalar sextets are naturally embedded not only in SO (10), but also in our model with intersecting D-branes, as extensively discussed in [47]. 8 For other D-branes model generating a Majorana mass for the neutron and other intriguing signatures for phenomenology, in Ultra Cold Neutron Physics, Ultra High Energy Cosmic Rays, FCNCs and LHC, see [64][65][66][67][68][69][70].…”

More about the instanton/soliton/kink correspondence

“…all gauge instantons are constructed using the constrains µ C = µ R = 0 (20) while T is Linearly dependent to the ∆ operator as…”

Weak gravity conjecture as a razor criterium for exotic D-brane instantons

“…So that, we impose a calculability bound (15) for N > 3. On the other hand, for N = 2 (bilinear superpotentials), M ≤ M P l in order to neglect quantum gravity corrections and [30,31]. For instance, this quiver is (locally) compatible with the tadpole cancellations and SM hypercharge conditions discussed and applied in Refs.…”

“…In fact, contrary to gauge instantons, exotic instantons could violate U (1) vector-like symmetries like B − L with a strong coupling. For example, ∆B = 2 violating processes like NeutronAntineutron transitions can be generated from several different models, without destabilizing the proton [23][24][25][26][27][28][29][30][31][32][33][34]. So that, it is important to identify a possible razor principle for exotic instantons which, rephrasing ArkaniHamed et al (in Ref.…”