Low Energy Electron Positron Physics at Jefferson Lab

Positron beam-based search for a MeV mass range axion

Not scheduled

20m

F113 (CEBAF CENTER)

Speakers

Bogdan Wojtsekhowski (Jefferson Lab)Prof. Ashot Gasparian (NCAT)

Description

The search proposed here uses a missing mass method in one photon final state for a reaction of a positron-electron annihilation.Muon and electron g-2 measurements are the only other comparable approaches which are able to give a model independent constraint on the electron-axion (A’) coupling constant.The proposed experiment with a 100 MeV beam in 30-days run will reach a sensitivity for the axion 100 times better than given by g-2 experiments for the mass range 2-13 MeV.The proposed detector system will use the existing PRad-II experimental setup, including the HyCal calorimeter and GEM coordinate detectors.