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This Week at Physics

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Events on Tuesday, April 21st, 2015

Chaos & Complex Systems Seminar
Towards understanding IceCube high energy neutrinos
Time: 12:05 pm
Place: 4274 Chamberlin Hall (Refreshments will be served)
Speaker: Yang Bai, UW Department of Physics
Abstract: The IceCube collaboration has recently observed high energy neutrinos in the 30 TeV to 2 PeV range. The flux is much above the atmospheric neutrino background and requires new sources to explain its origin. In this talk, I will provide a list of potential explanations with a focus on decaying dark matter and point-like sources.
Host: Clint Sprott
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Theory Seminar (High Energy/Cosmology)
Perturbative Unitarity Constraints on Dark Sectors
Time: 4:00 pm
Place: 5280 Chamberlin Hall
Speaker: Sonia El Hedri
Abstract: We describe a method that uses perturbative unitarity constraints to find the characteristic energy scales in theories of thermal Dark Matter. We apply this method to three Dark Matter portals: the NMSSM Higgs sector, a Z' model with a dark Higgs, and a squark simplified model, and derive the projected constraints from ton-scale Direct Detection experiments. We briefly describe projected constraints from a 100TeV collider. We also investigate the physical meaning of unitarity bounds on Dark Matter models and how to set more refined bounds on Dark Matter portals
Host: Ran Lu
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