Observation of the Decay B -] Jpsi Eta K and Search for the X(3872) -] Jpsi Eta
Author | : |
Publisher | : |
Total Pages | : 7 |
Release | : 2004 |
ISBN-10 | : OCLC:871238634 |
ISBN-13 | : |
Rating | : 4/5 (34 Downloads) |
Book excerpt: The authors report the observation of the B meson decay B{sup ±} 2!J/[psi][eta]K{sup ±} and evidence for the decay B° 2!J/[psi][eta]K{sub S}°, using 90 million B{bar B} events collected at the [Upsilon](4S) resonance with the BABAR detector at the PEP-II ee− asymmetric-energy storage ring. They obtain branching fractions of [Beta](B{sup ±} 2!J/[psi][eta]K{sup ±}) = (10.8 {+-} 2.3(stat.) {+-} 2.4(syst.)) x 10−5 and [Beta](B° 2!J/[psi][eta]K{sub S}°) = (8.4 {+-} 2.6(stat.) {+-} 2.7(syst.)) x 10−5. They search for the new narrow mass state, the X(3872), recently reported by the Belle Collaboration, in the decay B{sup {+-}} 2!X(3872)K{sup {+-}}, X(3872) 2!J/[psi][eta] and determine an upper limit of [Beta](B{sup {+-}} 2!X(3872)K{sup {+-}}) 2!(J/[psi][eta]K{sup {+-}})