Pure gravity mediation and spontaneous B – L breaking from strong dynamics

摘要: In pure gravity mediation (PGM), the most minimal scheme for of supersymmetry (SUSY) breaking to visible sector, soft masses standard model gauginos are generated at one loop rather than via direct couplings SUSY-breaking eld. any concrete implementation PGM, eld is therefore required carry nonzero charge under some global or local symmetry. As we point out in this note, a prime candidate such symmetry might be B L, Abelian gauge associated with dierence between baryon number and lepton L. The F-term then not only breaks SUSY, but also which relates respective spontaneous SUSY L fundamental level. particularly interesting consequence, nd that heavy Majorana neutrino mass scale ends up being tied gravitino mass, N m3=2. Assuming nonthermal leptogenesis responsible generation asymmetry universe, connection may explain why necessarily needs broken high energy scale, so m3=2 & 1000 TeV accord concept PGM. We illustrate our idea by means dynamical breaking, identied as weakly gauged avor discuss eect