Measurement of CP-violating asymmetries in B° decays to CP Eigenstates

B Aubert; Paul Bright-Thomas; Theresa Harrison; Christopher Hawkes; Andrew Kirk; David Knowles; Stephen O'Neale; Alan Watson; Nigel Watson

doi:10.1103/PhysRevLett.86.2515

Measurement of CP-violating asymmetries in B° decays to CP Eigenstates

B Aubert
, Paul Bright-Thomas
, Theresa Harrison
, Christopher Hawkes
, Andrew Kirk
, David Knowles
, Stephen O'Neale
, Alan Watson
, Nigel Watson

Physics and Astronomy

Research output: Contribution to journal › Article

140 Citations (Scopus)

Abstract

We present measurements of time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurement uses a data sample of 23x10(6) Upsilon(4S)-->BbarB decays collected by the BABAR detector at the PEP-II asymmetric B Factory at SLAC. In this sample, we find events in which one neutral B meson is fully reconstructed in a CP eigenstate containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2beta, is derived from the decay time distributions in such events. The result is sin2beta = 0.34+/-0.20 (stat)+/-0.05 (syst).

Original language	English
Pages (from-to)	2515-2522
Number of pages	8
Journal	Physical Review Letters
Volume	86
Issue number	12
Early online date	1 Mar 2001
DOIs	https://doi.org/10.1103/PhysRevLett.86.2515
Publication status	Published - 1 Mar 2001

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10.1103/PhysRevLett.86.2515

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title = "Measurement of CP-violating asymmetries in B° decays to CP Eigenstates",

abstract = "We present measurements of time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurement uses a data sample of 23x10(6) Upsilon(4S)-->BbarB decays collected by the BABAR detector at the PEP-II asymmetric B Factory at SLAC. In this sample, we find events in which one neutral B meson is fully reconstructed in a CP eigenstate containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2beta, is derived from the decay time distributions in such events. The result is sin2beta = 0.34+/-0.20 (stat)+/-0.05 (syst).",

author = "B Aubert and Paul Bright-Thomas and Theresa Harrison and Christopher Hawkes and Andrew Kirk and David Knowles and Stephen O'Neale and Alan Watson and Nigel Watson",

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T1 - Measurement of CP-violating asymmetries in B° decays to CP Eigenstates

AU - Aubert, B

AU - Bright-Thomas, Paul

AU - Harrison, Theresa

AU - Hawkes, Christopher

AU - Kirk, Andrew

AU - Knowles, David

AU - O'Neale, Stephen

AU - Watson, Alan

AU - Watson, Nigel

PY - 2001/3/1

Y1 - 2001/3/1

N2 - We present measurements of time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurement uses a data sample of 23x10(6) Upsilon(4S)-->BbarB decays collected by the BABAR detector at the PEP-II asymmetric B Factory at SLAC. In this sample, we find events in which one neutral B meson is fully reconstructed in a CP eigenstate containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2beta, is derived from the decay time distributions in such events. The result is sin2beta = 0.34+/-0.20 (stat)+/-0.05 (syst).

AB - We present measurements of time-dependent CP-violating asymmetries in neutral B decays to several CP eigenstates. The measurement uses a data sample of 23x10(6) Upsilon(4S)-->BbarB decays collected by the BABAR detector at the PEP-II asymmetric B Factory at SLAC. In this sample, we find events in which one neutral B meson is fully reconstructed in a CP eigenstate containing charmonium and the flavor of the other neutral B meson is determined from its decay products. The amplitude of the CP-violating asymmetry, which in the standard model is proportional to sin2beta, is derived from the decay time distributions in such events. The result is sin2beta = 0.34+/-0.20 (stat)+/-0.05 (syst).

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DO - 10.1103/PhysRevLett.86.2515

M3 - Article

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SN - 1079-7114

VL - 86

SP - 2515

EP - 2522

JO - Physical Review Letters

JF - Physical Review Letters

IS - 12

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Measurement of CP-violating asymmetries in B° decays to CP Eigenstates

Abstract

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