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Center for Astrophysics Research and Technologies Seminar Series Information

 

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Light dark matter and the LDMX experiment

Friday April 7, 2023
3:30 pm


 Presenter:  Dr. Bertrand Echenard (Caltech)
 Series:  Physics and Astronomy Colloquium
 Abstract:  Elucidating the nature of dark matter is one of the greatest challenges of contemporary fundamental physics. Among the vast landscape of theoretical possibilities, dark matter originating as a thermal relic in the early Universe presents many appealing features. This paradigm also greatly restricts the range of possible dark matter masses to the ~ MeV - 100 TeV region. Considerable experimental attention has been given to Weakly Interacting Massive Particles in the upper end of this window, while sub-GeV dark matter remains largely unexplored. Interestingly, light dark matter could be realized in simple, predictive models testable in accelerator-based experiments. The Light Dark Matter eXperiment (LDMX) is a proposed electron-beam fixed-target experiment using a missing momentum approach to probe dark matter in the MeV-GeV range with unique sensitivity, and provide information about its mass if a signal is observed. The experiment can also probe a large variety of models of light new physics and perform measurements critical for next-generation neutrino experiments. In this talk we will review the physics of light dark matter, the main experimental challenges in accelerator-based searches, and the LDMX approach to uniquely explore these possibilities.abmool
 Host:  Dinesh Loomba
 Location:  PAIS 1100 and via Zoom. Please take the Satisfaction Survey

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