Observable Neutron-antineutron oscillations K.S. Babu Oklahoma State University NANO Mini-Workshop Washington University, St. Louis February 11, 2011 t Hooft (1976) Kuzmin, Rubakov, Shaposhnikov (1985) Baryon Number is violated in standard model Sphalerons and baryogenesis Popular B generation mechanisms Post-sphaleron baryogenesis K.S. Babu, R.N. Mohapatra, S. Nasri, Phys. Rev. Lett. 97:131301(2006) K.S. Babu, R.N. Mohapatra, S. Nasri, Phys. Rev. Lett. 98: (2007) K.S. Babu, P.S. Bhupal Dev, R.N. Mohapatra, Phys. Rev.D79: (2009) Possible B violating couplings S couplings Explicit Model B violating decay of S CP Asymmetry Model Predictions Proposal for B generation and Dark Matter Unified Model Unified Model (cont.) B Violating decays of N CP asymmetry n-nbar oscillations Four big questions in neutrino physics Results in the the present scenario PatiSalam Embedding FCNC constraints on diquarks Neutrino mass matrix Neutronantineutron oscillations New CP violation in B system via colored scalars E. Fortes, K. Babu, B. Dev, R. Mohapatra CP violation in Bs mixing and in B0 decays Summary and Conclusions