Observation of the Decay $B \to K \ell^{+} \ell^{-}$
| dc.creator | Abe, K. | |
| dc.date | 2001-09-18 | |
| dc.date | 2001-10-19 | |
| dc.date.accessioned | 2026-07-07T12:01:38Z | |
| dc.date.available | 2026-07-07T12:01:38Z | |
| dc.description | We report a search for the flavor-changing neutral current decay $B \to K^{(*)} \ell^{+} \ell^{-}$ using a 29.1 fb${}^{-1}$ data sample accumulated at the $Υ(4S)$ resonance with the Belle detector at the KEKB $e^{+}e^{-}$ storage ring. We observe the decay process $B\to K\ell^+\ell^- (\ell = e, μ)$, for the first time, with a branching fraction of ${\cal B}(B \to K \ell^{+} \ell^{-}) = (0.75^{+0.25}_{-0.21} \pm 0.09) \times 10^{-6}$. | |
| dc.description | submitted to Physical Review Letter | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0109026 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0109026 | |
| dc.identifier | Phys.Rev.Lett.88:021801,2002 | |
| dc.identifier | doi:10.1103/PhysRevLett.88.021801 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/207162 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Observation of the Decay $B \to K \ell^{+} \ell^{-}$ | |
| dc.type | text |