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http://hdl.handle.net/2445/131427| Title: | Observation of the exclusive reaction e+e− → ϕη at √-s = 10.58 GeV |
| Author: | Graugés Pous, Eugeni BABAR Collaboration |
| Keywords: | Física de partícules Experiments Particle physics Experiments |
| Issue Date: | 22-Dec-2006 |
| Publisher: | American Physical Society |
| Abstract: | 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 . |
| Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.74.111103 |
| It is part of: | Physical Review D, 2006, vol. 74, num. 11, p. 111103(R) |
| URI: | http://hdl.handle.net/2445/131427 |
| Related resource: | https://doi.org/10.1103/PhysRevD.74.111103 |
| ISSN: | 1550-7998 |
| Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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|---|---|---|---|---|
| 551673.pdf | 220.3 kB | Adobe PDF | View/Open |
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