Szczegóły publikacji
Opis bibliograficzny
Evidence for the rare decay $\Sigma^+$ $\to$ $p\mu^+\mu^-$ / R. Aaij, [et al.], A. DENDEK, [et al.], M. FIRLEJ, [et al.], T. FIUTOWSKI, [et al.], M. IDZIK, [et al.], W. KUCEWICZ, [et al.], M W. MAJEWSKI, [et al.], J. MOROŃ, [et al.], A. OBŁĄKOWSKA-MUCHA, [et al.], B. RACHWAŁ, [et al.], K. ŚWIENTEK, [et al.], T. SZUMLAK, [et al.] // Physical Review Letters ; ISSN 0031-9007. — 2018 — vol. 120 iss. 22 art. no. 221803, s. 221803-1–221803-10. — Bibliogr. s. 221803-5–221803-6. — W. Kucewicz - dod. afiliacja: Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Kraków
Autorzy (796)
Dane bibliometryczne
| ID BaDAP | 116242 |
|---|---|
| Data dodania do BaDAP | 2018-09-21 |
| Tekst źródłowy | URL |
| DOI | 10.1103/PhysRevLett.120.221803 |
| Rok publikacji | 2018 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Physical Review Letters |
Abstract
A search for the rare decay Σ+→pμ+μ− is performed using pp collision data recorded by the LHCb experiment at center-of-mass energies √s=7 and 8 TeV, corresponding to an integrated luminosity of 3 fb−1. An excess of events is observed with respect to the background expectation, with a signal significance of 4.1 standard deviations. No significant structure is observed in the dimuon invariant mass distribution, in contrast with a previous result from the HyperCP experiment. The measured Σ+→pμ+μ− branching fraction is (2.2+1.8−1.3)×10−8, where statistical and systematic uncertainties are included, which is consistent with the standard model prediction.
