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Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 89: Detektorsysteme III

T 89.7: Talk

Thursday, March 22, 2018, 18:00–18:15, Z6 - SR 2.007

The Mu3eGamma upgrade to the Mu3e experiment — •Hendrik Leuschner for the Mu3e collaboration — Physikalisches Institut, Universität Heidelberg

The Mu3e experiment investigates the potential LFV decay µ → eee with a final target sensitivity of 1 in 1016 at the Paul Scherrer Institute. Muons from a high intensity beam are stopped on a hollow double cone-shaped target. The primary setup consists of four thin silicon detector layers built from high-voltage monolithic active pixel sensors (HV-MAPS). Due to the low momentum of the decay particles, the resolution is mainly determined by multiple scattering. The reconstruction is therefore based on a fast 3-dimensional multiple scattering fit with high performance of up to 100 tracks per 50ns readout frame. Different LFV decay channels can be searched for in addition to µ → eee . With a potential upgrade called Mu3eGamma, the channel µ → eγ and subsequent γ→ ee can be investigated.

The simulated modifications include an additional photon conversion layer and two silicon detector layers with larger radii. The implementation in the Geant4 simulation setup is presented and studies on reconstruction performance and optimization are shown.

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