2017/01/31 by Sabyasachi Chakraborty, Joydeep Chakrabortty · 11 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Discrete symmetry #Electron #Gaugino #Grand Unified Theory #Gravitino #Higgs boson #Lepton #Lepton number #Minimal Supersymmetric Standard Model #Neutrino #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #R-parity #Standard Model (mathematical formulation) #Supergravity #Superpotential #Supersymmetry #Vacuum expectation value #hep-ph
paper · pdf · doi:10.1007/jhep10(2017)012
published in Journal of High Energy Physics 2017(10) (Springer Nature) · 23 pages, one figure (added), title changed, discussion added on sneutrino vev basis, accepted for publication in JHEP
arxiv created 2017/09/18 · openalex publication_date 2017/10/01 · arxiv updated 2017/10/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We propose a supersymmetric extension of the Standard Model (SM) with a continuous global U(1) R symmetry. The R-charges of the SM fields are identified with that of their lepton numbers. As a result, both bilinear and trilinear ‘R-parity violating’ (RPV) terms could be present at the superpotential. However, R-symmetry is not an exact symmetry as it is broken by supergravity effects. Hence, sneutrinos acquire a small vacuum expectation value in this framework. However, a suitable choice of basis ensures that the bilinear RPV terms can be completely rotated away from the superpotential and the scalar potential. On the other hand, the trilinear terms play a very crucial role in generating neutrino masses and mixing at the tree level. This is noticeably different from the typical R-parity violating Minimal Supersymmetric Standard Model. Also, gravitino mass turns out to be the order parameter of R-breaking and is directly related to the neutrino mass. We show that such a gravitino, within the mass range 200 keV ≲ m 3/2 ≲ 0.1 GeV can be an excellent dark matter candidate. Finally, we looked into the collider implications of our framework.