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Título : Search for Invisible Decays of the Upsilon(1S)
Autor : Babar Collaboration, Azzolini, Virginia, López-March, Neus, Martínez-Vidal, Fernando, Milanés, Diego A., Oyanguren, Arantza, Aubert, B.
Fecha de publicación : 18-Dec-2009
Editor: American Physical Society
Resumen: 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.
Versión del editor: 10.1103/PhysRevLett.103.251801
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.103.251801
Citación : Physical Review Letters 103 (25): 251801 (2009)
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