High Energy Physics Seminar
Speaker: Andrew Whitbeck, FNAL
Title: LDMX: a fixed target experiment for discovering light dark matter
Refreshments available at 1:30 pm.
Date: Tue, 24 Oct 2017, 1:45 pm – 2:45 pm
Location: 1400 BPS Bldg.
Dark matter (DM) models with a thermal origin are a popular class of models for explaining the observed relic abundance of DM and generically requires that DM have a mass ∼1 MeV < mDM < ∼1 TeV. A mature program for using accelerator, indirect detection, and direction direction techniques is currently targeting WIMP-like DM, ∼1 GeV < mDM < ∼1 TeV. While these results are an important contribution to the study of the thermal DM parameter space, for DM masses below ∼1 GeV, cross sections consistent with the thermal relic abundance have yet to be probed by either direct detection or accelerator-based searches. A new class of experiments is needed to probe this light DM parameter space (∼1 MeV < mDM < ∼1 GeV) and fully explore the thermal DM paradigm. The LDMX experiment will be sensitive to a wide range of dark matter scenarios by searching for large missing momentum from 4-12 GeV electrons incident on a thin radiator. This talk will discuss the experimental strategy and challenges of the LDMX experiment as well as the prospect of applying collider detector technology to address these challenges. The discussion will conclude with the projected sensitivity of the LDMX experiment to light DM.