Ishikawa, A;
Abe, K;
Abe, K;
Abe, T;
Adachi, I;
Ahn, BS;
Aihara, H;
... Belle Collaboration; + view all
(2003)
Observation of B -> K(*)l(+)l(-).
PHYS REV LETT
, 91
(26)
, Article 261601. 10.1103/PhysRevLett.91.261601.
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Abstract
We report the observation of the flavor-changing neutral current decay B-->K*l(+l-) and an improved measurement of the decay B-->Kl(+l-), where l represents an electron or a muon, with a data sample of 140 fb(-1) accumulated at the Y(4S) resonance with the Belle detector at KEKB. The results for the branching fractions are B(B-->K*l(+l-))=(11.5(-2.4)(+2.6)+/-0.8+/-0.2)x10(-7) and B(B-->Kl(+l-))=(4.8(-0.9)(+1.0)+/-0.3+/-0.1)x10(-7), where the first error is statistical, the second is systematic and the third is from model dependence.
| Type: | Article |
|---|---|
| Title: | Observation of B -> K(*)l(+)l(-) |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.91.261601 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.91.261601 |
| Language: | English |
| Additional information: | © 2003 The American Physical Society |
| Keywords: | STANDARD MODEL, RARE DECAYS, BELLE DETECTOR, QUARK, SUPERSYMMETRY, SEARCH |
| UCL classification: | UCL 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/1308413 |
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