A Search for B+ --> tau+ nu Recoiling Against B- --> D0 l- nu X
| dc.creator | BABAR Collaboration | |
| dc.creator | Aubert, B. | |
| dc.date | 2003-03-22 | |
| dc.date.accessioned | 2026-07-07T03:35:43Z | |
| dc.date.available | 2026-07-07T03:35:43Z | |
| dc.description | We present a search for the decay $B^{+} \to τ^{+} ν_τ$ in $88.9 \times 10^{6}$ $Υ(4S)$ decays recorded with the BABAR detector at the SLAC $B$-Factory. A sample of semi-exclusive, semi-leptonic B decays ($B^{-} \to D^{0} \ell^{-} \bar{ν_{\ell}}X$), where $X$ is either a photon, $π^{0}$, or nothing, is used to identify the daughter particles that are associated with the other $B$ meson in each event. These particles are searched for evidence of a one-prong leptonic $B^{+} \to τ^{+} ν_τ$ decay. For this data sample we set a preliminary upper limit on the branching fraction of $\mathcal{B}(B^{+} \to τ^{+} ν_τ) < 4.9 \times 10^{-4}$ at the 90% confidence level. This result is then combined with a statistically independent BABAR search for $B^{+} \to τ^{+} ν_τ$ to give a combined preliminary limit of $\mathcal{B}(B^{+} \to τ^{+} ν_τ) < 4.1 \times 10^{-4}$. | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0303034 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0303034 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/37458 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | A Search for B+ --> tau+ nu Recoiling Against B- --> D0 l- nu X | |
| dc.type | text |