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Evidence for B+ -> J/psi p(Lambda)over-bar and search for B-0 -> J/psi p(p)over-bar

Aubert, B; Barate, R; Boutigny, D; Gaillard, JM; Hicheur, A; Karyotakis, Y; Lees, JP; ... BABAR Collaboration, ; + view all (2003) Evidence for B+ -> J/psi p(Lambda)over-bar and search for B-0 -> J/psi p(p)over-bar. PHYS REV LETT , 90 (23) , Article 231801. 10.1103/PhysRevLett.90.231801. Green open access

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Abstract

We have performed a search for the decays B+-->J/psip (&ULambda;) over bar and B-0-->J/psip (p) over bar in a data set of (88.9+/-1.0)x10(6) Y(4S) decays collected by the BABAR experiment at the PEP-II e(+)e(-) storage ring at the Stanford Linear Accelerator Center. Four charged B candidates have been observed with an expected background of 0.21+/-0.14 events. The corresponding branching fraction is (12(-6)(+9))x10(-6), where statistical and systematic uncertainties have been combined. The result can be interpreted as a 90% confidence level (C.L.) upper limit of 26x10(-6). We also find one B-0 candidate, with an expected background of 0.64+/-0.17 events, implying a 90% C.L. upper limit of 1.9x10(-6).

Type: Article
Title: Evidence for B+ -> J/psi p(Lambda)over-bar and search for B-0 -> J/psi p(p)over-bar
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.90.231801
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.90.231801
Language: English
Additional information: © 2003 The American Physical Society
UCL classification: UCL > Provost and Vice Provost Offices
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 > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Brain Repair and Rehabilitation
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/1303626
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