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Limit on the B-0 ->rho(0)rho(0) branching fraction and implications for the Cabibbo-Kobayashi-Maskawa angle alpha

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BaBar Collaboration (Including: UNSPECIFIED). (2005) Limit on the B-0 ->rho(0)rho(0) branching fraction and implications for the Cabibbo-Kobayashi-Maskawa angle alpha. PHYSICAL REVIEW LETTERS, 94 (13). -. doi:10.1103/PhysRevLett.94.131801 ISSN 0031-9007.

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.94.131801

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Abstract

We search for the decay B-0->rho(0)rho(0) in a data sample of about 227x10(6) Upsilon(4S)-> B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at SLAC. We find no significant signal and set an upper limit of 1.1x10(-6) at 90% C.L. on the branching fraction. As a result, the uncertainty due to penguin contributions on the Cabibbo-Kobayashi-Maskawa unitarity angle alpha measured in B ->rho rho decays is decreased to 11 degrees at 68% C.L.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Journal or Publication Title: PHYSICAL REVIEW LETTERS
Publisher: AMERICAN PHYSICAL SOC
ISSN: 0031-9007
Official Date: 8 April 2005
Dates:
DateEvent
8 April 2005UNSPECIFIED
Volume: 94
Number: 13
Number of Pages: 7
Page Range: -
DOI: 10.1103/PhysRevLett.94.131801
Publication Status: Published

Data sourced from Thomson Reuters' Web of Knowledge

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