Measurement of the Differential Branching Fraction and Forward-Backward Asymmetry for B->K(*)l+l-
| dc.creator | The Belle Collaboration | |
| dc.creator | Adachi, I. | |
| dc.date | 2008-10-02 | |
| dc.date.accessioned | 2026-07-07T10:07:01Z | |
| dc.date.available | 2026-07-07T10:07:01Z | |
| dc.description | We study B->K(*)l+l- decays based on a large data sample of 657 million BB pairs collected with the Belle detector at the KEKB e+e- collider. The differential branching fraction, the isospin asymmetry, the K* polarization, and the forward-backward asymmetry (A_FB) as functions of q^2 are reported. The fitted A_FB spectrum tends to be shifted toward the positive side from the SM expectation. The measured branching fractions and lepton flavor ratios (electron/muon) are B(B->K*l+l-)=(10.8+1.1-1.0+-0.9)*10^-7, B(B->Kl+l-)=(4.8+0.5-0.4+-0.3)*10^-7, R_K*=1.21+-0.25+-0.08, and R_K=0.97+-0.18+-0.06, respectively. | |
| dc.description | 8 pages, 5 figures | |
| dc.identifier | https://arxiv.org/abs/0810.0335 | |
| dc.identifier | http://arxiv.org/abs/0810.0335 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/170492 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Measurement of the Differential Branching Fraction and Forward-Backward Asymmetry for B->K(*)l+l- | |
| dc.type | text |