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BABAR Collaboration (Including:
). (2007) Search for B+→τ+ν. Physical Review D, Vol.76 (No.5). Article: 052002. ISSN 1550-7998 Full text not available from this repository.
Official URL: http://dx.doi.org/10.1103/PhysRevD.76.052002
Abstract
We present a search for the decay B+->tau(+)nu using 383x10(6)B (B) over bar pairs collected at the Upsilon(4S) resonance with the BABAR detector at the SLAC PEP-II B-Factory. A sample of events with one reconstructed semileptonic B decay (B--> D(0)l - (v) over bar lX) is selected, and in the recoil a search for B+-> tau(+)nu is performed. The tau is identified in the following channels: tau(+)-> e(+)nu(v) over bar, tau(+)->mu(+)nu(v) over bar, tau(+)->pi(+)(v) over bar, and tau(+)->pi(+)pi(0)(v) over bar. We measure a branching fraction of B(B+->tau(+)nu)=(0.9 +/- 0.6(stat.)+/- 0.1(syst.))x10(-4). In the absence of a significant signal, we calculate an upper limit at the 90% confidence level of B(B+->tau(+)nu)< 1.7x10(-4). We calculate the product of the B meson decay constant f(B) and vertical bar V-ub vertical bar to be f(B)center dot vertical bar V-ub vertical bar=(7.2(-2.8)(+2.0)(stat.)+/- 0.2(syst.))x10(-4) GeV.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
| Divisions: | Faculty of Science > Physics |
| Journal or Publication Title: | Physical Review D |
| Publisher: | American Physical Society |
| ISSN: | 1550-7998 |
| Date: | September 2007 |
| Volume: | Vol.76 |
| Number: | No.5 |
| Number of Pages: | 12 |
| Page Range: | Article: 052002 |
| Identification Number: | 10.1103/PhysRevD.76.052002 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| URI: | http://wrap.warwick.ac.uk/id/eprint/31147 |
Data sourced from Thomson Reuters' Web of Knowledge
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