Beyond Standard Model Physics and its cosmological consequences

Several potential new physics signals reported by ATLAS and CMS collaborations during previous run of LHC had provided a window of opportunity to put some of the Beyond Standard Model theories on trial. On the cosmology side, various direct dark matter detection experiments point towards the existence of light dark matter candidate (in contrast to the typical TeV-scale supersymmetric WIMPy dark matter), thereby challenging some of the supersymmetric models. The successful BSM models should be capable of explaining all the sure signatures of BSM physics (e.g. Dark matter, matter-antimatter asymmetry of the Universe) along with the anomalies in the collider experiments. In this talk, we will discuss the possibilities of addressing these potential new physics signals within the framework of left-right symmetric theories and the consequent implications on leptogenesis which is one of the most attractive mechanisms to address the baryon asymmetry of the Universe. We will also discuss briefly about a particular co-genesis mechanism in which the observed baryon asymmetry of the universe and light dark matter can be produced simultaneously in the context of a particular supersymmetric model embedded in string framework.