Measurement of the time-dependent CP asymmetry in B⁰ → Φ K⁰ decay

B Aubert; Kelly Ford; Theresa Harrison; Christopher Hawkes; Sian Morgan; Alan Watson

doi:10.1103/PhysRevLett.93.071801

Measurement of the time-dependent CP asymmetry in B⁰ → Φ K⁰ decay

B Aubert, Kelly Ford, Theresa Harrison, Christopher Hawkes, Sian Morgan, Alan Watson

Physics and Astronomy

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Abstract

We present a measurement of the time-dependent CP asymmetry for the neutral B-meson decay B0-->phiK0. We use a sample of approximately 114 x 10(6) B-meson pairs taken at the Upsilon(4S) resonance with the BABAR detector at the PEP-II B-meson factory at SLAC. We reconstruct the CP eigenstates phiK0S and phiK0L, where phi-->K+K-, K0S-->pi+pi-, and K0L is observed via its hadronic interactions. The other B meson in the event is tagged as either a B0 or Bbar0 from its decay products. The values of the CP-violation parameters are SphiK=0.47+/-0.34(stat)+0.08-0.06(syst) and CphiK=0.01+/-0.33(stat)+/-0.10(syst).

Original language	English
Pages (from-to)	071801
Number of pages	1
Journal	Physical Review Letters
Volume	93
Early online date	1 Aug 2004
DOIs	https://doi.org/10.1103/PhysRevLett.93.071801
Publication status	Published - 1 Aug 2004

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title = "Measurement of the time-dependent CP asymmetry in B⁰ → Φ K⁰ decay",

abstract = "We present a measurement of the time-dependent CP asymmetry for the neutral B-meson decay B0-->phiK0. We use a sample of approximately 114 x 10(6) B-meson pairs taken at the Upsilon(4S) resonance with the BABAR detector at the PEP-II B-meson factory at SLAC. We reconstruct the CP eigenstates phiK0S and phiK0L, where phi-->K+K-, K0S-->pi+pi-, and K0L is observed via its hadronic interactions. The other B meson in the event is tagged as either a B0 or Bbar0 from its decay products. The values of the CP-violation parameters are SphiK=0.47+/-0.34(stat)+0.08-0.06(syst) and CphiK=0.01+/-0.33(stat)+/-0.10(syst).",

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

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doi = "10.1103/PhysRevLett.93.071801",

language = "English",

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TY - JOUR

T1 - Measurement of the time-dependent CP asymmetry in B⁰ → Φ K⁰ decay

AU - Aubert, B

AU - Ford, Kelly

AU - Harrison, Theresa

AU - Hawkes, Christopher

AU - Morgan, Sian

AU - Watson, Alan

PY - 2004/8/1

Y1 - 2004/8/1

N2 - We present a measurement of the time-dependent CP asymmetry for the neutral B-meson decay B0-->phiK0. We use a sample of approximately 114 x 10(6) B-meson pairs taken at the Upsilon(4S) resonance with the BABAR detector at the PEP-II B-meson factory at SLAC. We reconstruct the CP eigenstates phiK0S and phiK0L, where phi-->K+K-, K0S-->pi+pi-, and K0L is observed via its hadronic interactions. The other B meson in the event is tagged as either a B0 or Bbar0 from its decay products. The values of the CP-violation parameters are SphiK=0.47+/-0.34(stat)+0.08-0.06(syst) and CphiK=0.01+/-0.33(stat)+/-0.10(syst).

AB - We present a measurement of the time-dependent CP asymmetry for the neutral B-meson decay B0-->phiK0. We use a sample of approximately 114 x 10(6) B-meson pairs taken at the Upsilon(4S) resonance with the BABAR detector at the PEP-II B-meson factory at SLAC. We reconstruct the CP eigenstates phiK0S and phiK0L, where phi-->K+K-, K0S-->pi+pi-, and K0L is observed via its hadronic interactions. The other B meson in the event is tagged as either a B0 or Bbar0 from its decay products. The values of the CP-violation parameters are SphiK=0.47+/-0.34(stat)+0.08-0.06(syst) and CphiK=0.01+/-0.33(stat)+/-0.10(syst).

U2 - 10.1103/PhysRevLett.93.071801

DO - 10.1103/PhysRevLett.93.071801

M3 - Article

C2 - 15324225

SN - 1079-7114

VL - 93

SP - 071801

JO - Physical Review Letters

JF - Physical Review Letters

ER -

Measurement of the time-dependent CP asymmetry in B⁰ → Φ K⁰ decay

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