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This Week at Physics

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Event Number 4869

  Tuesday, September 4th, 2018

Theory Seminar (High Energy/Cosmology)
Swampland conjectures and their phenomenological application
Time: 2:00 pm
Place: 5280 Chamberlin Hall
Speaker: Pablo Soler, Heidelberg University
Abstract: An enormous amount of four dimensional effective field theories, many of them with interesting phenomenological implications, can be obtained from compactifications of string theory. The set of these theories is known as the landscape of string theory. It has been suggested that, beyond this landscape, there exist consistent-looking effective field theories that cannot be embedded into UV complete theories of quantum gravity, in particular into string theory. They are said to belong to the swampland. In this talk I will describe some of the conjectures that define the boundaries of the swampland and implications they have on phenomenology, in particular in models of dark matter and inflation. When applied to axions, the swampland program naturally leads to the study of gravitational instantons and Euclidean wormholes. I will also review some of the properties and puzzles posed by these exotic objects.
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