Observation of the Decay B -> Jpsi eta K and search for the X(3872) -> jpsi eta
- SLAC
The authors report the observation of the B meson decay B{sup {+-}} {yields} J/{psi}{eta}K{sup {+-}} and evidence for the decay B{sup 0} {yields} J/{psi}{eta}K{sub S}{sup 0}, using 90 million B{bar B} events collected at the {Upsilon}(4S) resonance with the BABAR detector at the PEP-II e{sup +}e{sup -} asymmetric-energy storage ring. They obtain branching fractions of {Beta}(B{sup {+-}} {yields} J/{psi}{eta}K{sup {+-}}) = (10.8 {+-} 2.3(stat.) {+-} 2.4(syst.)) x 10{sup -5} and {Beta}(B{sup 0} {yields} J/{psi}{eta}K{sub S}{sup 0}) = (8.4 {+-} 2.6(stat.) {+-} 2.7(syst.)) x 10{sup -5}. They search for the new narrow mass state, the X(3872), recently reported by the Belle Collaboration, in the decay B{sup {+-}} {yields} X(3872)K{sup {+-}}, X(3872) {yields} J/{psi}{eta} and determine an upper limit of {Beta}(B{sup {+-}} {yields} X(3872)K{sup {+-}}) {yields} (J/{psi}{eta}K{sup {+-}}) < 7.7 x 10{sup -6} at 90% C.L.
- Research Organization:
- Stanford Linear Accelerator Center, Menlo Park, CA (US)
- Sponsoring Organization:
- USDOE Office of Science (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 826746
- Report Number(s):
- SLAC-PUB-10332
- Country of Publication:
- United States
- Language:
- English
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