Aubert, B;
Barate, R;
Boutigny, D;
Couderc, F;
Gaillard, JM;
Hicheur, A;
Karyotakis, Y;
... BaBar Collaboration; + view all
(2004)
Observation of the decay B -> J/psi eta K and search for X(3872)-> J/psi eta.
PHYS REV LETT
, 93
(4)
, Article 041801. 10.1103/PhysRevLett.93.041801.
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Abstract
We report the observation of the B meson decay B+/--->J/psietaK(+/-) and evidence for the decay B-0-->J/psietaK(S)(0), using 90x10(6) B(B) over bar events collected at the Y(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)]x10(-5) and B(B-0-->J/psietaK(S)(0))=[8.4+/-2.6(stat)+/-2.7(syst)]x10(-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(+/-)]<7.7x10(-6) at 90% confidence level.
| Type: | Article |
|---|---|
| Title: | Observation of the decay B -> J/psi eta K and search for X(3872)-> J/psi eta |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.93.041801 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.93.041801 |
| Language: | English |
| Additional information: | The American Physical Society |
| Keywords: | MESON DECAYS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1303666 |
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