A search for $\mu^+\to e^+\gamma$ with the first dataset of the MEG II experiment
2023
Online
report
The MEG II experiment, based at the Paul Scherrer Institut in Switzerland, reports the result of a search for the decay $\mu^+\to e^+\gamma$ from data taken in the first physics run in 2021. No excess of events over the expected background is observed, yielding an upper limit on the branching ratio of B($\mu^+\to e^+\gamma$) < $7.5 \times 10^{-13}$ (90% C.L.). The combination of this result and the limit obtained by MEG gives B($\mu^+\to e^+\gamma$) < $3.1 \times 10^{-13}$ (90% C.L.), which is the most stringent limit to date. A ten-fold larger sample of data is being collected during the years 2022-2023, and data-taking will continue in the coming years.
Comment: 10 pages, 6 figures. To be published in EPJC
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A search for $\mu^+\to e^+\gamma$ with the first dataset of the MEG II experiment
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Autor/in / Beteiligte Person: | MEG II collaboration ; Afanaciev, K. ; Baldini, A. M. ; Ban, S. ; Baranov, V. ; Benmansour, H. ; Biasotti, M. ; Boca, G. ; Cattaneo, P. W. ; Cavoto, G. ; Cei, F. ; Chiappini, M. ; Chiarello, G. ; Corvaglia, A. ; Cuna, F. ; Maso, G. Dal ; De Bari, A. ; De Gerone, M. ; Barusso, L. Ferrari ; Francesconi, M. ; Galli, L. ; Gallucci, G. ; Gatti, F. ; Gerritzen, L. ; Grancagnolo, F. ; Grandoni, E. G. ; Grassi, M. ; Grigoriev, D. N. ; Hildebrandt, M. ; Ieki, K. ; Ignatov, F. ; Ikeda, F. ; Iwamoto, T. ; Karpov, S. ; Kettle, P. R. ; Khomutov, N. ; Kobayashi, S. ; Kolesnikov, A. ; Kravchuk, N. ; Krylov, V. ; Kuchinskiy, N. ; Kyle, W. ; Libeiro, T. ; Malyshev, V. ; Matsushita, A. ; Meucci, M. ; Mihara, S. ; Molzon, W. ; Mori, Toshinori ; Nakao, M. ; Nicolò, D. ; Nishiguchi, H. ; Ochi, A. ; Ogawa, S. ; Onda, R. ; Ootani, W. ; Oya, A. ; Palo, D. ; Panareo, M. ; Papa, A. ; Pettinacci, V. ; Popov, A. ; Renga, F. ; Ritt, S. ; Rossella, M. ; Rozhdestvensky, A. ; Schwendimann, P. ; Shimada, K. ; Signorelli, G. ; Takahashi, M. ; Tassielli, G. F. ; Toyoda, K. ; Uchiyama, Y. ; Usami, M. ; Venturini, A. ; Vitali, B. ; Voena, C. ; Yamamoto, K. ; Yanai, K. ; Yonemoto, T. ; Yoshida, K. ; Yudin, Yu. V. |
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Veröffentlichung: | 2023 |
Medientyp: | report |
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