Non-resonant leptogenesis in seesaw models with an almost conserved B-L

We review the motivations and some results on leptogenesis in seesaw models with an almost conserved lepton number. The paper is based on a talk given at the 5th International Symposium on Symmetries in Subatomic Physics, SSP2012.Comment: 8 pages, 1 figure. Published in the proceedings of the 5th International Symposium on Symmetries in Subatomic Physics, SSP201

Confinement, Vacuum Structure: from QCD to Quantum Gravity

A minimal Lorentz gauge gravity model with R^2-type Lagrangian is proposed. In the absence of torsion the model admits a topological phase with unfixed metric. The model possesses a minimal set of dynamical degrees of freedom for the torsion. Remarkably, the torsion has the same number of dynamical of-shell degrees of freedom as the metric tensor. We trace an analogy between the structure of the quantum chromodynamics and the structure of possible theory of quantum gravity.Comment: 7 pages; reduced version of talk given at IV International Symposium on Symmetries in Subatomic Physics (SSP 2009), plenary session in Honor of Yongmin Cho's 65th Birthday, Taipei, Taiwan, 2-5 June 2009; to appear in "Symmetries in Subatomic Physics", ed. P. Hwang

CP Violation in Λ\Lambda to p π−\pi^-: SM vs New Physics

I discuss CP violation in $\Lambda$ to p $\pi^-$ comparing the standard model expectations with what could happen in new physics scenarios. I point out that Fermilab experiment E871 is sensitive to some of these scenarios.Comment: 6 pages, Talk at Hyperon 99 Fermilab, and at Symmetries in Subatomic Physics, Adelaide, 200

Nambu Bracket for M Theory

In this article we give a concise review of recent progress in our understanding of the Lie 3-algebra and their application to the Bagger-Lambert-Gustavsson model describing multiple M2-branes in M theory.Comment: 13 pages, prepared for The Fourth International Symposium on Symmetries in Subatomic Physics (SSP 2009), minor modification, references adde

Unravelling strange quarks in nucleon structure

We present a discourse on the stages of discovery that have led to a deeper understanding of the role played by strange quarks in the structure of the nucleon.Comment: 6 pages, 2 figures; prepared for the proceedings of Achievements and New Directions in Subatomic Physics: Workshop in Honour of Tony Thomas' 60th Birthda