1. Observable Neutron-antineutron oscillations K.S. Babu Oklahoma State University NANO Mini-Workshop Washington University, St. Louis February 11, 2011

4. ‘t Hooft (1976) Kuzmin, Rubakov, Shaposhnikov (1985) Baryon Number is violated in standard model

5. Sphalerons and baryogenesis

6. Popular B generation mechanisms

7. 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. 98:161301 (2007) K.S. Babu, P.S. Bhupal Dev, R.N. Mohapatra, Phys. Rev.D79:015017 (2009)

8. Possible B violating couplings

9. S couplings

10. Explicit Model

11. B violating decay of S

12. CP Asymmetry

13. Model Predictions

15. Proposal for B generation and Dark Matter

16. Unified Model

17. Unified Model (cont.)

18. B Violating decays of N

20. CP asymmetry

21. n-nbar oscillations

22. Four big questions in neutrino physics

23. Results in the the present scenario

24. Pati—Salam Embedding

25. FCNC constraints on diquarks

27. Neutrino mass matrix

28. Neutron—antineutron oscillations

29. New CP violation in B system via colored scalars E. Fortes, K. Babu, B. Dev, R. Mohapatra

30. CP violation in Bs mixing and in B0 decays

32. Summary and Conclusions