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Searches for the decays B-0 -> l(+/-)tau(-/+) and B+-> l(+)nu (l = e, mu) using hadronic tag reconstruction
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(2008) Searches for the decays B-0 -> l(+/-)tau(-/+) and B+-> l(+)nu (l = e, mu) using hadronic tag reconstruction. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.77 (No.9). doi:10.1103/PhysRevD.77.091104 Research output not available from this repository, contact author.
Official URL: http://dx.doi.org/10.1103/PhysRevD.77.091104
Abstract
We present searches for the leptonic decays B+-> l(+)nu and the lepton flavor violating decays B-0 -> l(+/-)tau(-/+), where l = e, mu, with data collected by the BABAR experiment at SLAC. This search demonstrates a novel technique in which we fully reconstruct the accompanying (B) over bar in Gamma(4S)-> B (B) over bar events, and look for a monoenergetic lepton from the signal B decay. The signal yield is extracted from a fit to the signal lepton candidate momentum distribution in the signal B rest frame. Using a data sample of approximately 378x10(6) B (B) over bar pairs (342 fb(-1)), we find no evidence of signal in any of the decay modes. Branching fraction upper limits of B(B+ -> e(+)nu) < 5.2 x 10(-6), B(B+ -> mu(+)nu) < 5.6 x 10(-6), B(B-0 -> e(+)tau(-)) < 2.8 x 10(-5) and B(B-0 -> mu(+)tau(-)) < 2.2 x 10(-5), are obtained at 90% confidence level.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
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| Divisions: | Faculty of Science > Physics | ||||
| Journal or Publication Title: | Physical Review D (Particles, Fields, Gravitation and Cosmology) | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 1550-7998 | ||||
| Official Date: | May 2008 | ||||
| Dates: |
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| Volume: | Vol.77 | ||||
| Number: | No.9 | ||||
| Number of Pages: | 9 | ||||
| DOI: | 10.1103/PhysRevD.77.091104 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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