Brookhaven Forum 2019 (BF2019): Particle Physics and Cosmology in the 2020's, will be held at Brookhaven National Laboratory, Upton, NY, USA, September 25–27, 2019. The BF2019 agenda will cover the current status, as well as prospects and opportunities for the next decade, of theory and experiment in particle physics and cosmology. Talks will be arranged in plenary and parallel sessions.
Event ID: 40375
"Seeing the Unseeable: Making the First Image of a Black Hole"
Presented by Sheperd Doeleman (Harvard-Smithsonian Center for Astrophysics; Director, Event Horizon Telescope)
This event is open to the public.
(Light fare and refreshments will be served)
In Higgs portal models of fermion dark matter, scalar couplings are unavoidably suppressed by strong bounds from direct detection experiments. As a consequence, thermal dark matter relics must coexist with mediators in a compressed spectrum of dark particles. Small couplings and small mass splittings lead to slow mediator decays, leaving signatures with displaced vertices or disappearing tracks at colliders. We perform a comprehensive analysis of long-lived mediators at the LHC in the context of a minimal dark matter model with a naturally small Higgs portal, also known as the wino-bino scenario in supersymmetry. Existing searches for disappearing charged tracks and displaced hard leptons already exclude tiny portal couplings that cannot be probed by current direct and indirect detection experiments. For larger portal couplings, we predict new signatures with displaced soft leptons, which are accessible with run-II data. Searches for displaced particles are sensitive to weakly coupling mediators with masses up to the TeV scale, well beyond the reach of prompt signals.
420 Rt. 25A
Rocky Point, NY 11778
*Please Note: Coach bus will meet in front of Berkner Hall at 5:45pm for boarding