May 29, 2018 to June 3, 2018
Hyatt Regency Indian Wells Conference Center
US/Pacific timezone

Searching for New Forces with Dark Light

May 30, 2018, 5:50 PM
East Foyer | Larkspur/Mesquite Rooms (Hyatt Regency Indian Wells Conference Center)

East Foyer | Larkspur/Mesquite Rooms

Hyatt Regency Indian Wells Conference Center

44600 Indian Wells Lane, Indian Wells, CA 92210, USA
Parallel PPHI DM / PPHI


Dr Ross Corliss (MIT)


Cosmic motivations and anomalies in precision measurements have encouraged standard model extensions in the form of Dark Photons or, more generically, a new force-carrier. Existing experimental searches for such particles have probed the majority of the parameter space of simple models, but so far no culprit has been found and the standard-model anomalies remain unexplained. The recent report of anomalous correlations in $^8$Be transitions has heightened interest in a potential new particle near 17 MeV. Although this region has been partially explored via hadronic production mechanisms, a particle with proto-phobic couplings is more effectively probed using leptonic production. The DarkLight experiment proposes to search for this particle in the invariant mass spectrum of $e^+e^-$ pairs produced in electron-nuclear scattering. I will give an overview of the staged approach we have taken, including recent tests at the LERF facility at JLab and designs for a future large-acceptance detector, and also our near-term proposal to install a spectrometer pair at the CEBAF Injector to search for this signal in an intensity regime where backgrounds from accidental coincidence dominate.
E-mail [email protected]
Collaboration name DarkLight Collaboration
Funding source This work is supported by DOE grants DE-FG02-94ER40818 and DE-SC0011970, and NSF MRI grant PHY-1437402

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