Observation of the decay B → J/ψηK and search for X(3872) → J/ψη

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

doi:10.1103/PhysRevLett.93.041801

Observation of the decay B → J/ψηK and search for X(3872) → J/ψη

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

Physics and Astronomy

Research output: Contribution to journal › Article

62 Citations (Scopus)

Abstract

We report the observation of the B meson decay B+/- -->J/psietaK+/- and evidence for the decay B0-->J/psietaK0S, using 90 x 10(6) BB; events collected at the Upsilon(4S) resonance with the BABAR detector at the SLAC PEP-II e+e- asymmetric-energy storage ring. We obtain branching fractions of B(B+/- -->J/psietaK+/-) = [10.8 +/- 2.3(stat) +/- 2.4(syst)] x 10(-5) and B(B0-->J/psietaK0S) = [8.4 +/- 2.6(stat) +/- 2.7(syst)] x 10(-5). We search for the new narrow mass state, the X(3872), recently reported by the Belle Collaboration, in the decay B+/- -->X(3872)K+/-,X(3872)-->J/psieta and determine an upper limit of B[B +/- -->X(3872)K+/- -->J/psietaK+/-] <7.7 x 10(-6) at 90% confidence level.

Original language	English
Pages (from-to)	041801
Number of pages	1
Journal	Physical Review Letters
Volume	93
Issue number	4
Early online date	1 Jul 2004
DOIs	https://doi.org/10.1103/PhysRevLett.93.041801
Publication status	Published - 1 Jul 2004

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10.1103/PhysRevLett.93.041801

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@article{2c50c3b06e35457589cdbff6d168ff4b,

title = "Observation of the decay B → J/ψηK and search for X(3872) → J/ψη",

abstract = "We report the observation of the B meson decay B+/- -->J/psietaK+/- and evidence for the decay B0-->J/psietaK0S, using 90 x 10(6) BB; events collected at the Upsilon(4S) resonance with the BABAR detector at the SLAC PEP-II e+e- asymmetric-energy storage ring. We obtain branching fractions of B(B+/- -->J/psietaK+/-) = [10.8 +/- 2.3(stat) +/- 2.4(syst)] x 10(-5) and B(B0-->J/psietaK0S) = [8.4 +/- 2.6(stat) +/- 2.7(syst)] x 10(-5). We search for the new narrow mass state, the X(3872), recently reported by the Belle Collaboration, in the decay B+/- -->X(3872)K+/-,X(3872)-->J/psieta and determine an upper limit of B[B +/- -->X(3872)K+/- -->J/psietaK+/-] <7.7 x 10(-6) at 90\% confidence level.",

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

year = "2004",

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doi = "10.1103/PhysRevLett.93.041801",

language = "English",

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TY - JOUR

T1 - Observation of the decay B → J/ψηK and search for X(3872) → J/ψη

AU - Aubert, B

AU - Ford, Kelly

AU - Harrison, Theresa

AU - Hawkes, Christopher

AU - Morgan, Sian

AU - Watson, Alan

AU - Watson, Nigel

PY - 2004/7/1

Y1 - 2004/7/1

N2 - We report the observation of the B meson decay B+/- -->J/psietaK+/- and evidence for the decay B0-->J/psietaK0S, using 90 x 10(6) BB; events collected at the Upsilon(4S) resonance with the BABAR detector at the SLAC PEP-II e+e- asymmetric-energy storage ring. We obtain branching fractions of B(B+/- -->J/psietaK+/-) = [10.8 +/- 2.3(stat) +/- 2.4(syst)] x 10(-5) and B(B0-->J/psietaK0S) = [8.4 +/- 2.6(stat) +/- 2.7(syst)] x 10(-5). We search for the new narrow mass state, the X(3872), recently reported by the Belle Collaboration, in the decay B+/- -->X(3872)K+/-,X(3872)-->J/psieta and determine an upper limit of B[B +/- -->X(3872)K+/- -->J/psietaK+/-] <7.7 x 10(-6) at 90% confidence level.

AB - We report the observation of the B meson decay B+/- -->J/psietaK+/- and evidence for the decay B0-->J/psietaK0S, using 90 x 10(6) BB; events collected at the Upsilon(4S) resonance with the BABAR detector at the SLAC PEP-II e+e- asymmetric-energy storage ring. We obtain branching fractions of B(B+/- -->J/psietaK+/-) = [10.8 +/- 2.3(stat) +/- 2.4(syst)] x 10(-5) and B(B0-->J/psietaK0S) = [8.4 +/- 2.6(stat) +/- 2.7(syst)] x 10(-5). We search for the new narrow mass state, the X(3872), recently reported by the Belle Collaboration, in the decay B+/- -->X(3872)K+/-,X(3872)-->J/psieta and determine an upper limit of B[B +/- -->X(3872)K+/- -->J/psietaK+/-] <7.7 x 10(-6) at 90% confidence level.

U2 - 10.1103/PhysRevLett.93.041801

DO - 10.1103/PhysRevLett.93.041801

M3 - Article

C2 - 15323749

SN - 1079-7114

VL - 93

SP - 041801

JO - Physical Review Letters

JF - Physical Review Letters

IS - 4

ER -

Observation of the decay B → J/ψηK and search for X(3872) → J/ψη

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