The DarkLight Experiment: A Precision Search for New Physics at Low Energies

Balewski, J.; Bernauer, J.; Bessuille, J.; Corliss, R.; Cowan, R.; Epstein, C.; Fisher, P.; Hasell, D.; Ihloff, E.; Kahn, Y.

The DarkLight Experiment: A Precision Search for New Physics at Low Energies

Dec 15, 2014

4 pages

e-Print:

1412.4717 [physics.ins-det]

Report number:

JLAB-ACC-14-1930

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Abstract: (arXiv)

We describe the current status of the DarkLight experiment at Jefferson Laboratory. DarkLight is motivated by the possibility that a dark photon in the mass range 10 to 100 MeV/c

^2

could couple the dark sector to the Standard Model. DarkLight will precisely measure electron proton scattering using the 100 MeV electron beam of intensity 5 mA at the Jefferson Laboratory energy recovering linac incident on a windowless gas target of molecular hydrogen. The complete final state including scattered electron, recoil proton, and e+e- pair will be detected. A phase-I experiment has been funded and is expected to take data in the next eighteen months. The complete phase-II experiment is under final design and could run within two years after phase-I is completed. The DarkLight experiment drives development of new technology for beam, target, and detector and provides a new means to carry out electron scattering experiments at low momentum transfers.

Note:

Whitepaper submitted to Town Meeting on Fundamental and Symmetries and Neutrinos, O'Hare airport, Chicago, IL

activity report
new physics: search for
electron p: scattering
gas: target
hydrogen
dark matter
Jefferson Lab
detector: technology

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