Observation of a significant excess of π⁰π⁰ events in B meson decays

B Aubert; Theresa Harrison; Kelly Ford; Christopher Hawkes; David Knowles; Sian Morgan; Richard Penny; Alan Watson; Nigel Watson

doi:10.1103/PhysRevLett.91.241801

Observation of a significant excess of π⁰π⁰ events in B meson decays

B Aubert, Theresa Harrison, Kelly Ford, Christopher Hawkes, David Knowles, Sian Morgan, Richard Penny, Alan Watson, Nigel Watson

Physics and Astronomy

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Abstract

We present a study of the decay B0-->pi(0)pi(0) based on a sample of 124 x 10(6) BB pairs recorded by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We observe 46+/-13+/-3 events, where the first error is statistical and the second is systematic, corresponding to a significance of 4.2 standard deviations including systematic uncertainties. We measure the branching fraction B(B0-->pi(0)pi(0))=(2.1+/-0.6+/-0.3)x10(-6), averaged over B0 and B(0) decays.

Original language	English
Pages (from-to)	241801
Number of pages	1
Journal	Physical Review Letters
Volume	91
Issue number	24
Early online date	1 Dec 2003
DOIs	https://doi.org/10.1103/PhysRevLett.91.241801
Publication status	Published - 1 Dec 2003

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10.1103/PhysRevLett.91.241801

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title = "Observation of a significant excess of π⁰π⁰ events in B meson decays",

abstract = "We present a study of the decay B0-->pi(0)pi(0) based on a sample of 124 x 10(6) BB pairs recorded by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We observe 46+/-13+/-3 events, where the first error is statistical and the second is systematic, corresponding to a significance of 4.2 standard deviations including systematic uncertainties. We measure the branching fraction B(B0-->pi(0)pi(0))=(2.1+/-0.6+/-0.3)x10(-6), averaged over B0 and B(0) decays.",

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T1 - Observation of a significant excess of π⁰π⁰ events in B meson decays

AU - Aubert, B

AU - Harrison, Theresa

AU - Ford, Kelly

AU - Hawkes, Christopher

AU - Knowles, David

AU - Morgan, Sian

AU - Penny, Richard

AU - Watson, Alan

AU - Watson, Nigel

PY - 2003/12/1

Y1 - 2003/12/1

N2 - We present a study of the decay B0-->pi(0)pi(0) based on a sample of 124 x 10(6) BB pairs recorded by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We observe 46+/-13+/-3 events, where the first error is statistical and the second is systematic, corresponding to a significance of 4.2 standard deviations including systematic uncertainties. We measure the branching fraction B(B0-->pi(0)pi(0))=(2.1+/-0.6+/-0.3)x10(-6), averaged over B0 and B(0) decays.

AB - We present a study of the decay B0-->pi(0)pi(0) based on a sample of 124 x 10(6) BB pairs recorded by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We observe 46+/-13+/-3 events, where the first error is statistical and the second is systematic, corresponding to a significance of 4.2 standard deviations including systematic uncertainties. We measure the branching fraction B(B0-->pi(0)pi(0))=(2.1+/-0.6+/-0.3)x10(-6), averaged over B0 and B(0) decays.

U2 - 10.1103/PhysRevLett.91.241801

DO - 10.1103/PhysRevLett.91.241801

M3 - Article

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SN - 1079-7114

VL - 91

SP - 241801

JO - Physical Review Letters

JF - Physical Review Letters

IS - 24

ER -

Observation of a significant excess of π⁰π⁰ events in B meson decays

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