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T: Fachverband Teilchenphysik

T 96: Detector Systems 3

T 96.4: Talk

Thursday, March 24, 2022, 17:00–17:15, T-H27

The detector system for the Stopping Target Monitor of the Mu2e experiment at Fermilab — •Anna Ferrari, Stefan E. Mueller, Oliver Knodel, and Reuven Rachamin for the Mu2e collaboration — Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany

The Mu2e experiment, which is currently under construction at the Fermi National Accelerator Laboratory near Chicago, will search for the neutrinoless conversion of muons to electrons in the field of an aluminum nucleus, with the aim to reach a sensitivity four orders of magnitude better than previous experiments . Observations of a signal would be an example of Charged Lepton Flavor Violation, which would require physics beyond the Standard Model.

In order to normalize the result, a stopping target monitor will measure the number of stopped and captured muons in the aluminum target. The detector system includes a HPGe and a Lanthanum Bromide detector, which with different capabilities will measure x- and gamma-ray lines up to 1809 keV, in presence of high rate Bremsstrahlung and other backgrounds. At the Helmholtz-Zentrum Dresden-Rossendorf, we use the Bremsstrahlung photon beamline at the ELBE radiation facility to study the detector system performance in the pulsed conditions similar to that expected in Mu2e.

In the presentation, after an overview of the design and status of the Mu2e experiment, the main results of the ELBE campaign will be presented and discussed.