Measurement of the B+ --> eta l+ nu and B+ --> eta' l+ nu Branching Fractions using Upsilon(4S)-->BBbar Events Tagged by a Fully Reconstructed B Meson
| dc.creator | The BABAR Collaboration | |
| dc.creator | Aubert, B. | |
| dc.date | 2006-07-26 | |
| dc.date.accessioned | 2026-07-07T07:16:35Z | |
| dc.date.available | 2026-07-07T07:16:35Z | |
| dc.description | We report preliminary measurements of the exclusive charmless semileptonic branching fractions of the B+ --> eta l+ nu and B+ --> eta' l+ nu decays. These measurements are based on 316 fb-1 of data collected at the Y(4S) resonance by the BABAR detector. In events in which the decay of one B meson to a hadronic final state is fully reconstructed, the semileptonic decay of the recoiling B meson is identified by the detection of a charged lepton and an eta or eta'. We measure the branching fraction BR(B+ --> eta l+ nu) = (0.84 +/- 0.27 +/- 0.21) x 10-4, where the first error is statistical and the second one systematic. We also set an upper limit on the branching fraction of BR(B+ --> eta l+ nu) < 1.4 x 10-4 and BR(B+ --> eta' l+ nu) < 1.3 x 10^-4 at the 90% confidence level. | |
| dc.description | 18 pages, 7 figures, submitted to ICHEP2006 | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0607066 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0607066 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/113640 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Measurement of the B+ --> eta l+ nu and B+ --> eta' l+ nu Branching Fractions using Upsilon(4S)-->BBbar Events Tagged by a Fully Reconstructed B Meson | |
| dc.type | text |