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Abstract
摘要 |
Quantum gravity is often believed to have very little to do with observable physics. In this talk, we discuss how general properties of quantum gravity can impose non-trivial constraints on dark matter physics and on inflationary scenarios. First, we discuss how the existence of milli-charged dark matter particles squares with quantum gravity and string theory. Then, we propose a mechanism motivated by string theory, known as Stuckelberg portal, by which the dark matter particles can interact with the visible matter. Finally, we discuss how quantum gravity can impose a stringent upper bound on the axion field ranges (aka decay constants) and hence the gravitational wave signal generated by axion inflation. |
