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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/22019
Title: Search for Invisible Decays of the Upsilon(1S)
Authors: Babar Collaboration; Azzolini, Virginia; López-March, Neus; Martínez-Vidal, Fernando; Milanés, Diego A.; Oyanguren, Arantza; 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
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.103.251801
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