Shedding light on dark matter in asymptotic safety

          @misc{ pirsa_PIRSA:18060023,
            doi = {10.48660/18060023},
            url = {https://pirsa.org/18060023},
            author = {Eichhorn, Astrid},
            keywords = {Cosmology, Particle Physics},
            language = {en},
            title = {Shedding light on dark matter in asymptotic safety},
            publisher = {Perimeter Institute},
            year = {2018},
            month = {jun},
            note = {PIRSA:18060023 see, \url{https://pirsa.org}}
          }
          

Abstract

The nature of dark matter is one of the outstanding riddles of fundamental physics. Here, I will discuss first steps to explore dark matter in the asymptotic safety paradigm. As a first example, I will show indications for an asymptotically safe fixed point in the Higgs portal to fermionic dark matter, leading to a relation between the Higgs portal coupling and the dark matter mass. This model also serves as an example for different mechanisms that generate asymptotic safety. I will then review some properties of an extended Higgs sector under the coupling to asymptotically safe quantum gravity and discuss how quantum gravity fluctuations flatten the Higgs potential and thus lead to a decoupling of scalar singlets which are subject to experimental searches for dark matter.