A Search for B+ --> tau+ nu Recoiling Against B- --> D0 l- nubar X
| dc.creator | The BABAR Collaboration | |
| dc.creator | Aubert, B. | |
| dc.date | 2006-08-07 | |
| dc.date.accessioned | 2026-07-07T07:20:15Z | |
| dc.date.available | 2026-07-07T07:20:15Z | |
| dc.description | We present a search for the decay $B^{+} \to τ^{+} ν_τ$ using 288 fb-1 of data collected at the $Υ(4S)$ resonance with the BaBar detector at the SLAC PEP-II $B$-Factory. A sample of events with one reconstructed semileptonic B decay is selected, and in the recoil a search for $B^{+} \to τ^{+} ν_τ$ signal is performed. The $τ$ is identified in the following channels: {τ^+ \to e^+ ν_e \nutb}, {τ^+ \to μ^+ ν_μ \nutb}, {τ^+ \to π^+ \nutb} and {τ^+ \to π^+ π^0 \nutb}. We measure a branching fraction of $\mathcal{B}(B^{+} \to τ^{+} ν_τ)=(0.88^{+0.68}_{-0.67}({stat.}) \pm 0.11 ({syst.})) \times 10^{-4}$ and extract an upper limit on the branching fraction, at the 90% confidence level, of $\mathcal{B}(B^{+} \to τ^{+} ν_τ) < 1.8 \times 10^{-4}$. We calculate the product of the $B$ meson decay constant and $|\Vub|$ to be $f_{B}\cdot|\Vub| = (7.0^{+2.3}_{-3.6}({stat.})^{+0.4}_{-0.5}({syst.}))\times10^{-4}$ GeV \. | |
| dc.description | 22 pages, 11 figures; submitted to the 33rd International Conference on High-Energy Physics (ICHEP 06), Moscow, Russia, July 26-August 2, 2006 | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0608019 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0608019 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/114898 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | A Search for B+ --> tau+ nu Recoiling Against B- --> D0 l- nubar X | |
| dc.type | text |