Nuclear Physics Seminars
Tuesday, February 26, 2013
Physics Building, Room 204
[Host: Donal Day]
"A Search For Dark Forces At The Jefferson Lab Free Electron Laser"
Recent theories of dark matter predict A’ gauge bosons in the mass range of 0.01-10 GeV that
couple to charged fermions with a strength of α’/αΕΜ~ 10-4 of the photon or less. The DarkLight (Detecting A Resonance Kinematically with eLectrons Incident on a Gaseous Hydrogen Target) experiment intends to use the 1 MW 100 MeV electron beam at the Jefferson Lab Free Electron Laser incident on a 1019 H2/cm2 thick target to study the process e- + p -> e- + p +e- + e+. A dark force particle would show up as a narrow resonance in the radiated e+ - e- system. DarkLight
would explore the A’ mass region 10-100 MeV with sensitivity to couplings as low as a’/aEM ~10-7 with 1/ab of data.
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