The MEG II experiment, based at the Paul Scherrer Institut in Switzerland, reports the result of a search for the decay mu(+)-> 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(+)-> e(+)gamma) <7.5x10(-13) (90% CL). The combination of this result and the limit obtained by MEG gives B (mu(+)-> e(+)gamma) <3.1x10(-13) (90% CL), 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.
Afanaciev K., Baldini A.M., Ban S., Baranov V., Benmansour H., Biasotti M., et al. (2024). A search for μ+→e+γ with the first dataset of the MEG II experiment. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 84(3) [10.1140/epjc/s10052-024-12416-2].
A search for μ+→e+γ with the first dataset of the MEG II experiment
Chiarello G.;
2024-03-01
Abstract
The MEG II experiment, based at the Paul Scherrer Institut in Switzerland, reports the result of a search for the decay mu(+)-> 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(+)-> e(+)gamma) <7.5x10(-13) (90% CL). The combination of this result and the limit obtained by MEG gives B (mu(+)-> e(+)gamma) <3.1x10(-13) (90% CL), 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.
| File | Dimensione | Formato | |
|---|---|---|---|
|
s10052-024-12416-2.pdf
accesso aperto
Tipologia:
Versione Editoriale
Dimensione
867.63 kB
Formato
Adobe PDF
|
867.63 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
