Speaker
Dr
Seamus Riordan
(Argonne National Laboratory)
Description
The A' Experiment, or APEX, aims to search for a new vector boson that kinetically mixes with the photon, a "dark photon" or a "heavy photon", with a mass of $\mathcal O$(100 MeV) by studying the invariant mass spectrum of $e^+e^-$ pairs produced from an electron beam on a high-Z target. Dark photons appear in many well-motivated extensions of the Standard Model and may mediate interactions between dark matter and ordinary matter. APEX will extend current constraints on the mixing parameter by a factor of a few for dark photon masses near 100 MeV. APEX is scheduled to take data at Jefferson Lab in early 2019, taking advantage of the high duty-factor electron beam and using the twin symmetric high resolution spectrometers in Hall A. An overview of the current constraints for such a boson and experimental plans will be presented.
| sriordan@anl.gov | |
| Collaboration name | APEX Collaboration |
| Funding source | Work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under contract number DE-AC02-06CH11357. |
Primary author
Dr
Seamus Riordan
(Argonne National Laboratory)
