Current Experiments Archive
E12-10-009: A' (APEX) - Search for a New Vector Boson A' Decaying to e+e−
The A' Experiment (APEX) will search for a new vector boson A' with very weak coupling to electrons in the mass range from 65 MeV to 550 MeV. New vector bosons with such small couplings arise naturally from a small kinetic mixing of the "dark photon" A' with the photon -- one of the very few ways in which new forces can couple to the Standard Model -- and have received considerable attention as an explanation of various dark matter related anomalies. A' bosons are produced by radiation off an electron beam, and they could appear as narrow resonances with small production cross-section in the Quantum Electrodynamics e+e− spectrum.