Photon energy reconstruction with the MEG II liquid xenon calorimeter
The MEG II experiment searches for a charged-lepton-flavour-violating μ → eε with the target sensitivity of 6×10−14. A liquid xenon calorimeter with VUV-sensitive photosensors measures photon position, timing, and energy. This paper concentrates on the precise photon energy reconstruction with the M...
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| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2025-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2025/05/epjconf_calor2024_00030.pdf |
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| Summary: | The MEG II experiment searches for a charged-lepton-flavour-violating μ → eε with the target sensitivity of 6×10−14. A liquid xenon calorimeter with VUV-sensitive photosensors measures photon position, timing, and energy. This paper concentrates on the precise photon energy reconstruction with the MEG II liquid xenon calorimeter. Since a muon beam rate is 3–5 × 107 s−1, multi-photon elimination analysis is performed using waveform analysis techniques such as a template waveform fit. As a result, background events in the energy range of 48–58 MeV were reduced by 34 %. The calibration of the energy scale of the calorimeter with several calibration sources is also discussed to achieve a high resolution of 1
.8 %. |
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| ISSN: | 2100-014X |