Photon energy reconstruction with the MEG II liquid xenon calorimeter
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866929634591899648 |
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| author | Yamamoto, Kensuke Ban, Sei Gerritzen, Lukas Iwamoto, Toshiyuki Kobayashi, Satoru Matsushita, Ayaka Mori, Toshinori Onda, Rina Ootani, Wataru Oya, Atsushi |
| author_facet | Yamamoto, Kensuke Ban, Sei Gerritzen, Lukas Iwamoto, Toshiyuki Kobayashi, Satoru Matsushita, Ayaka Mori, Toshinori Onda, Rina Ootani, Wataru Oya, Atsushi |
| contents | The MEG II experiment searches for a charged-lepton-flavour-violating $μ\to e γ$ with the target sensitivity of $6 \times 10^{-14}$. 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 $3\text{-}5 \times 10^{7}~\text{s}^{-1}$, 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 %. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_19417 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Photon energy reconstruction with the MEG II liquid xenon calorimeter Yamamoto, Kensuke Ban, Sei Gerritzen, Lukas Iwamoto, Toshiyuki Kobayashi, Satoru Matsushita, Ayaka Mori, Toshinori Onda, Rina Ootani, Wataru Oya, Atsushi Instrumentation and Detectors High Energy Physics - Experiment The MEG II experiment searches for a charged-lepton-flavour-violating $μ\to e γ$ with the target sensitivity of $6 \times 10^{-14}$. 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 $3\text{-}5 \times 10^{7}~\text{s}^{-1}$, 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 %. |
| title | Photon energy reconstruction with the MEG II liquid xenon calorimeter |
| topic | Instrumentation and Detectors High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2407.19417 |