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Ben Rosser (Chicago) - Collider Searches for Dark Matter: From the WIMP to the Supersymmetric Axion
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https://cern.zoom.us/j/5277953357?pwd=N0dNdkxtYUZhRmFPSmlJblVZZVgrUT09
https://cern.zoom.us/j/5277953357?pwd=N0dNdkxtYUZhRmFPSmlJblVZZVgrUT09
Description
Speaker: Dr. Ben Rosser (Chicago)
Title: Collider Searches for Dark Matter: From the WIMP to the Supersymmetric Axion
Abstract: The nature of dark matter is one of the major open questions in particle physics. Many theories predict new particles beyond the Standard Model that could be dark matter candidates; two of the most popular are the weakly interacting massive particle (WIMP) and the QCD axion. Collider searches for new particles are often interpreted as constraints on WIMPs, and compared to WIMP direct detection experiments. Because the QCD axion is generally assumed to be very light, the relationship between axion direct detection and the LHC is much less well developed. However, if the axion exists, it must be part of a broader theory to be renormalizable, and it may be possible to search for that theory at a collider. In this talk, I will review how the WIMP interpretation is performed, using a run 2 search for Higgs portal dark matter from the ATLAS experiment as an example. I'll then discuss the collider phenomenology of a model in which the axion is combined with supersymmetry, which naturally gives rise to long lived signatures that could be visible at the LHC, and then discuss ATLAS displaced vertex analyses which can be interpreted in the context of this model.
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