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| Title: | Search for Invisible Decays of the Upsilon(1S) |
Authors: | Babar Collaboration; Azzolini, Virginia; López-March, Neus CSIC; Martínez-Vidal, Fernando CSIC ORCID; Milanés, Diego A. CSIC; Oyanguren, Arantza CSIC ORCID; Aubert, B. | Issue Date: | 18-Dec-2009 | Publisher: | American Physical Society | Citation: | Physical Review Letters 103 (25): 251801 (2009) | Abstract: | We search for invisible decays of the Upsilon(1S) meson using a sample of 91.4x10(6) Upsilon(3S) mesons collected at the BABAR/PEP-II B factory. We select events containing the decay Upsilon(3S)->pi(+)pi(-)Upsilon(1S) and search for evidence of an undetectable Upsilon(1S) decay recoiling against the dipion system. We set an upper limit on the branching fraction B(Upsilon(1S)-> invisible)< 3.0x10(-4) at the 90% confidence level. | Publisher version (URL): | http://dx.doi.org/ 10.1103/PhysRevLett.103.251801 | URI: | http://hdl.handle.net/10261/22019 | DOI: | 10.1103/PhysRevLett.103.251801 | ISSN: | 0031-9007 |
| Appears in Collections: | (IFIC) Artículos |
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| File | Description | Size | Format | |
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| invisible decays.pdf | 196,11 kB | Adobe PDF |  View/Open |
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