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Search for the rare decays B -> Kl(+)l(-) and B -> K*l(+)l(-)

Aubert, B; Boutigny, D; Gaillard, JM; Hicheur, A; Karyotakis, Y; Lees, JP; Robbe, P; ... BABAR Collaboration, .; + view all (2002) Search for the rare decays B -> Kl(+)l(-) and B -> K*l(+)l(-). PHYS REV LETT , 88 (24) , Article 241801. 10.1103/PhysRevLett.88.241801. Green open access

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Abstract

We present results from a search for the flavor-changing neutral current decays B --> Kl(+)l(-) and B --> K*l(+)l(-), where l(+)l(-) is either an e(+)e(-) or mu(+)mu(-) pair. The data sample comprises 22.7 x 10(6) Y (4S) --> BB decays collected with the BABAR detector at the PEP-II B Factory. We obtain the 90% C. L. upper limits B (B --> Kl(+)l(-)) <0.51 x 10(-6) and B (B --> K*l(+)l(-)) <3.1 x 10(-6), close to standard model predictions for these branching fractions. We have also obtained limits on the lepton-family-violating decays B --> Ke(+/-) mu(-/+) and B --> K* e(+/-) mu(-/+).

Type: Article
Title: Search for the rare decays B -> Kl(+)l(-) and B -> K*l(+)l(-)
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.88.241801
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.88.241801
Language: English
Keywords: SUM-RULE ANALYSIS, LIGHT-CONE QCD, STANDARD MODEL, B->KL(+)L(-), B->K-ASTERISK-L(+)L(-), B->K(ASTERISK)L(+)L(-)
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/1303607
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