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% CL). The combination of this result and the limit obtained by MEG gives B(μ+→e+γ)<3.1×10-13 (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.
A search for μ+→e+γ with the first dataset of the MEG II experiment
Benmansour H.;Cei F.;Chiappini M.;Francesconi M.;Grandoni E. G.;Nicolo D.;Papa A.;Signorelli G.;Venturini A.;
2024-01-01
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% CL). The combination of this result and the limit obtained by MEG gives B(μ+→e+γ)<3.1×10-13 (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 in questo prodotto:
| File | Dimensione | Formato | |
|---|---|---|---|
|
s10052-024-12416-MEGII-2021.pdf
accesso aperto
Tipologia:
Versione finale editoriale
Licenza:
Creative commons
Dimensione
868.01 kB
Formato
Adobe PDF
|
868.01 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
