Data di Pubblicazione:
2024
Abstract:
The MEG II experiment, based at the Paul Scherrer Institut in Switzerland, reports the result of a search for
the decay µ+ → e+ γ 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(µ+ → e+ γ) < 7.5 × 10−13 (90 % C.L.). The combination of this result and the limit obtained by MEG gives
B(µ+ → e+ γ) < 3.1 × 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.
the decay µ+ → e+ γ 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(µ+ → e+ γ) < 7.5 × 10−13 (90 % C.L.). The combination of this result and the limit obtained by MEG gives
B(µ+ → e+ γ) < 3.1 × 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.
Tipologia CRIS:
1.1 Articolo in rivista
Elenco autori:
K., Afanaciev; A. M., Baldini; S., Ban; V., Baranov; H., Benmansour; M., Biasotti; G., Boca; Cattaneo, P; G., Cavoto; F., Cei; M., Chiappini; G., Chiarello; A., Corvaglia; F., Cuna; G., Dal Maso; A., De Bari; M., De Gerone; L., Ferrari Barusso; M., Francesconi; L., Galli; G., Gallucci; F., Gatti; L., Gerritzen; F., Grancagnolo; E. G., Grandoni; M., Grassi; D. N., Grigoriev; M., Hildebrandt; K., Ieki; F., Ignatov; F., Ikeda; T., Iwamoto; S., Karpov; Kettle, P. -R.; N., Khomutov; S., Kobayashi; A., Kolesnikov; N., Kravchuk; V., Krylov; N., Kuchinskiy; W., Kyle; T., Libeiro; V., Malyshev; A., Matsushita; M., Meucci; S., Mihara; W., Molzon; Toshinori, Mori; M., Nakao; D., Nicolò; H., Nishiguchi; A., Ochi; S., Ogawa; R., Onda; W., Ootani; A., Oya; D., Palo; M., Panareo; A., Papa; V., Pettinacci; A., Popov; F., Renga; S., Ritt; M., Rossella; A., Rozhdestvensky; P., Schwendimann; K., Shimada; G., Signorelli; M., Takahashi; Tassielli, G. F.; K., Toyoda; Y., Uchiyama; M., Usami; A., Venturini; B., Vitali; C., Voena; K., Yamamoto; K., Yanai; T., Yonemoto; K., Yoshida; Yudin, Yu. V.
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