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BABAR Collaboration (Including:
). (2007) Search for B+→τ+ν. Physical Review D, Vol.76 (No.5). Article: 052002. doi:10.1103/PhysRevD.76.052002 ISSN 1550-7998.Research output not available from this repository.
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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 | ||||
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Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Physical Review D | ||||
Publisher: | American Physical Society | ||||
ISSN: | 1550-7998 | ||||
Official Date: | September 2007 | ||||
Dates: |
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Volume: | Vol.76 | ||||
Number: | No.5 | ||||
Number of Pages: | 12 | ||||
Page Range: | Article: 052002 | ||||
DOI: | 10.1103/PhysRevD.76.052002 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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