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https://hdl.handle.net/2445/131427| Títol: | Observation of the exclusive reaction e+e− → ϕη at √-s = 10.58 GeV |
| Autor: | Graugés Pous, Eugeni BABAR Collaboration |
| Matèria: | Física de partícules Experiments Particle physics Experiments |
| Data de publicació: | 22-des-2006 |
| Publicat per: | American Physical Society |
| Resum: | We report the observation of e + e − → ϕ η near √ s = 10.58 GeV with 6.5 σ significance in the K + K − γ γ final state in a data sample of 224 fb − 1 collected by the BABAR experiment at the PEP-II e + e − storage rings. We measure the restricted radiation-corrected cross section to be σ ( e + e − → ϕ η ) = 2.1 ± 0.4 ( stat ) ± 0.1 ( syst ) fb within the range | cos θ ∗ | < 0.8 , where θ ∗ is the center-of-mass polar angle of the ϕ meson. The ϕ meson is required to be in the invariant mass range of 1.008 < m ϕ < 1.035 GeV / c 2 . The radiation-corrected cross section in the full cos θ ∗ range is extrapolated to be 2.9 ± 0.5 ( stat ) ± 0.1 ( syst ) fb . |
| Nota: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.74.111103 |
| És part de: | Physical Review D, 2006, vol. 74, num. 11, p. 111103(R) |
| URI: | https://hdl.handle.net/2445/131427 |
| Recurs relacionat: | https://doi.org/10.1103/PhysRevD.74.111103 |
| ISSN: | 1550-7998 |
| Apareix en les col·leccions: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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