Limit on the B⁰ →  ρ⁰ ρ⁰ Branching Fraction and Implications for the Cabibbo-Kobayashi-Maskawa Angle α

B Aubert; Matthew Barrett; Kelly Ford; Theresa Harrison; Alistair Hart; Christopher Hawkes; Sian Morgan; Alan Watson

doi:10.1103/PhysRevLett.94.131801

Limit on the B⁰ → ρ⁰ ρ⁰ Branching Fraction and Implications for the Cabibbo-Kobayashi-Maskawa Angle α

B Aubert, Matthew Barrett, Kelly Ford, Theresa Harrison, Alistair Hart, Christopher Hawkes, Sian Morgan, Alan Watson

Physics and Astronomy

Research output: Contribution to journal › Article

125 Citations (Scopus)

Abstract

We search for the decay B0-->rho(0)rho(0) in a data sample of about 227x10(6) Upsilon(4S)-->BB 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-->rhorho decays is decreased to 11 degrees at 68% C.L.

Original language	English
Pages (from-to)	131801
Number of pages	1
Journal	Physical Review Letters
Volume	94
DOIs	https://doi.org/10.1103/PhysRevLett.94.131801
Publication status	Published - 1 Jan 2005

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title = "Limit on the B⁰ → ρ⁰ ρ⁰ Branching Fraction and Implications for the Cabibbo-Kobayashi-Maskawa Angle α",

abstract = "We search for the decay B0-->rho(0)rho(0) in a data sample of about 227x10(6) Upsilon(4S)-->BB 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-->rhorho decays is decreased to 11 degrees at 68% C.L.",

author = "B Aubert and Matthew Barrett and Kelly Ford and Theresa Harrison and Alistair Hart and Christopher Hawkes and Sian Morgan and Alan Watson",

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AU - Aubert, B

AU - Barrett, Matthew

AU - Ford, Kelly

AU - Harrison, Theresa

AU - Hart, Alistair

AU - Hawkes, Christopher

AU - Morgan, Sian

AU - Watson, Alan

PY - 2005/1/1

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N2 - We search for the decay B0-->rho(0)rho(0) in a data sample of about 227x10(6) Upsilon(4S)-->BB 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-->rhorho decays is decreased to 11 degrees at 68% C.L.

AB - We search for the decay B0-->rho(0)rho(0) in a data sample of about 227x10(6) Upsilon(4S)-->BB 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-->rhorho decays is decreased to 11 degrees at 68% C.L.

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DO - 10.1103/PhysRevLett.94.131801

M3 - Article

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SN - 1079-7114

VL - 94

SP - 131801

JO - Physical Review Letters

JF - Physical Review Letters

ER -

Limit on the B⁰ → ρ⁰ ρ⁰ Branching Fraction and Implications for the Cabibbo-Kobayashi-Maskawa Angle α

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