Speaker
Description
The Mu2e experiment at Fermilab will search for the neutrinoless muon-to-electron conversion in the nuclear field by stopping $\mu^{-}$ on an Al target. The experimental signature of $\mu^{-}$ to $e^{-}$ conversion on Al is the 104.97 MeV mono-energetic conversion $e^{-}$s. Rejection of one of the most important experimental backgrounds coming from muon Decays-In-Orbit requires a momentum resolution $<1\%$ FWHM and a momentum scale calibrated to an accuracy of better than 0.1% or 0.1 MeV. Among other momentum scale calibration techniques, the collaboration is considering using 68.9 MeV $e^{+}$s from $\pi^{+}\rightarrow e^{+},\nu_{e}$ decays of stopped $\pi^{+}$s. This calibration measurement has a significant background dominated by the muon decays in flight affecting the calibration accuracy. The background can be reduced by placing a thin Ti degrader in front of the stopping target and timing selection. We discuss the optimization of the momentum calibration measurement results.
| Alternate track | 03. Beyond the Standard Model |
|---|---|
| I read the instructions above | Yes |
