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Seminars
Addressing the BSM puzzles in the most minimalistic way: Purely Gravitational production of Dark Matter as a case study
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Europe/Athens
Description
In the last several decades our understanding of the Universe has been greatly advanced, establishing the Standard Model (SM) of Particles and Cosmology which has successfully passed a plethora of experimental tests at high and low energy accelerators. Despite this achievement, several important questions such as the nature of Dark Matter, the origin of Baryon asymmetry, the neutrino masses and the mechanism of Inflation remain unanswered leading us to believe that the SM is not the ultimate theory, but there should be some beyond the SM (BSM) physics. Recently, several intriguing ideas have been proposed for these problems, which can be tested directly in ground- and space-based experiments. However, the main message so far is that the most promising non-minimal SM extensions which could account for either of the above questions have been strictly constrained or already excluded experimentally. Therefore, it is inevitable that the data from the upcoming colliders will search for new-physics signals which are realised under the most minimal extensions of SM. In this talk, I will initially mention some of the progress on the theory level and summarise experimental prospects. Then I will describe how, under the most minimal extensions of either the SM or the spacetime, one could solve the above puzzles using purely gravitational interactions. In particular, the main part of my talk will be focused on showing how the mechanism of Cosmological Gravitational Particle Production (CGPP) could be the source of Dark Matter when the latter is realised via Sterile Neutrinos. I will also stress how this mechanism could unify all the puzzles stated above, demonstrating how my past and current research activity aims to advance the systematic search for Standard Model (of both Particles and Cosmology) extensions one step further. Finally, I will connect the above discussion with my prospective research directions and I will present to you my future scientific goals.
Videoconference via https://us02web.zoom.us/j/82249348474
