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New limit on the μ+->e+γdecay with the MEG II experiment

Fuente: arXiv

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Detalles Bibliográficos
Autores principales:	Afanaciev, K., Baldini, A. M., Ban, S., Benmansour, H., Boca, G., Cattaneo, P. W., Cavoto, G., Cei, F., Chiappini, M., Corvaglia, A., 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., Ignatov, F., Ikeda, F., Iwamoto, T., Karpov, S., Kettle, P. -R., Khomutov, N., Kolesnikov, A., Kravchuk, N., Krylov, V., Kuchinskiy, N., Leonetti, F., Li, W., Malyshev, V., Matsushita, A., Mihara, S., Moltzon, W., Mori, Toshinori, Nicolo', D., Nishiguchi, H., Ochi, A., Ogawa, H., Ootani, W., Oya, A., Palo, D., Panareo, M., Papa, A., Pasciuto, D., Popov, A., Renga, F., Ritt, S., Rossella, M., Rozhdestvensky, A., Scarpellini, S., Signorelli, G., Suzuki, H., Takahashi, M., Uchiyama, Y., Umakoshi, R., Venturini, A., Vitali, B., Voena, C., Yamamoto, K., Yokota, R., Yonemoto, T.
Formato:	Preprint
Publicado:	2025
Materias:	High Energy Physics - Experiment
Acceso en línea:	Acceder al recurso
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

_version_	1866918107563425792
author	Afanaciev, K. Baldini, A. M. Ban, S. Benmansour, H. Boca, G. Cattaneo, P. W. Cavoto, G. Cei, F. Chiappini, M. Corvaglia, A. 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. Ignatov, F. Ikeda, F. Iwamoto, T. Karpov, S. Kettle, P. -R. Khomutov, N. Kolesnikov, A. Kravchuk, N. Krylov, V. Kuchinskiy, N. Leonetti, F. Li, W. Malyshev, V. Matsushita, A. Mihara, S. Moltzon, W. Mori, Toshinori Nicolo', D. Nishiguchi, H. Ochi, A. Ogawa, H. Ootani, W. Oya, A. Palo, D. Panareo, M. Papa, A. Pasciuto, D. Popov, A. Renga, F. Ritt, S. Rossella, M. Rozhdestvensky, A. Scarpellini, S. Signorelli, G. Suzuki, H. Takahashi, M. Uchiyama, Y. Umakoshi, R. Venturini, A. Vitali, B. Voena, C. Yamamoto, K. Yokota, R. Yonemoto, T.
author_facet	Afanaciev, K. Baldini, A. M. Ban, S. Benmansour, H. Boca, G. Cattaneo, P. W. Cavoto, G. Cei, F. Chiappini, M. Corvaglia, A. 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. Ignatov, F. Ikeda, F. Iwamoto, T. Karpov, S. Kettle, P. -R. Khomutov, N. Kolesnikov, A. Kravchuk, N. Krylov, V. Kuchinskiy, N. Leonetti, F. Li, W. Malyshev, V. Matsushita, A. Mihara, S. Moltzon, W. Mori, Toshinori Nicolo', D. Nishiguchi, H. Ochi, A. Ogawa, H. Ootani, W. Oya, A. Palo, D. Panareo, M. Papa, A. Pasciuto, D. Popov, A. Renga, F. Ritt, S. Rossella, M. Rozhdestvensky, A. Scarpellini, S. Signorelli, G. Suzuki, H. Takahashi, M. Uchiyama, Y. Umakoshi, R. Venturini, A. Vitali, B. Voena, C. Yamamoto, K. Yokota, R. Yonemoto, T.
contents	This letter reports the result of the search for the decay μ+->e+γundertaken at the Paul Scherrer Institut in Switzerland with the MEG II experiment using the data collected in the 2021- 2022 physics runs. The sensitivity of this search is 2.2x10-13, a factor of 2.4 better than that of the full MEG dataset and obtained in a data taking period of about one fourth that of MEG, thanks to the superior performances of the new detector. The result is consistent with the expected background, yielding an upper limit on the branching ratio of B(μ+->e+γ)<1.5 x 10-13 (90 % C.L.). Additional improvements are expected with the data collected during the years 2023-2024. The data-taking will continue in the coming years.
format	Preprint
id	arxiv_https___arxiv_org_abs_2504_15711
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	New limit on the μ+->e+γdecay with the MEG II experiment Afanaciev, K. Baldini, A. M. Ban, S. Benmansour, H. Boca, G. Cattaneo, P. W. Cavoto, G. Cei, F. Chiappini, M. Corvaglia, A. 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. Ignatov, F. Ikeda, F. Iwamoto, T. Karpov, S. Kettle, P. -R. Khomutov, N. Kolesnikov, A. Kravchuk, N. Krylov, V. Kuchinskiy, N. Leonetti, F. Li, W. Malyshev, V. Matsushita, A. Mihara, S. Moltzon, W. Mori, Toshinori Nicolo', D. Nishiguchi, H. Ochi, A. Ogawa, H. Ootani, W. Oya, A. Palo, D. Panareo, M. Papa, A. Pasciuto, D. Popov, A. Renga, F. Ritt, S. Rossella, M. Rozhdestvensky, A. Scarpellini, S. Signorelli, G. Suzuki, H. Takahashi, M. Uchiyama, Y. Umakoshi, R. Venturini, A. Vitali, B. Voena, C. Yamamoto, K. Yokota, R. Yonemoto, T. High Energy Physics - Experiment This letter reports the result of the search for the decay μ+->e+γundertaken at the Paul Scherrer Institut in Switzerland with the MEG II experiment using the data collected in the 2021- 2022 physics runs. The sensitivity of this search is 2.2x10-13, a factor of 2.4 better than that of the full MEG dataset and obtained in a data taking period of about one fourth that of MEG, thanks to the superior performances of the new detector. The result is consistent with the expected background, yielding an upper limit on the branching ratio of B(μ+->e+γ)<1.5 x 10-13 (90 % C.L.). Additional improvements are expected with the data collected during the years 2023-2024. The data-taking will continue in the coming years.
title	New limit on the μ+->e+γdecay with the MEG II experiment
topic	High Energy Physics - Experiment
url	https://arxiv.org/abs/2504.15711