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Search for B+->tau(+)nu decays with hadronic B tags
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. (2008) Search for B+->tau(+)nu decays with hadronic B tags. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.77 (No.1). ISSN 1550-7998 Full text not available from this repository.
Official URL: http://dx.doi.org/10.1103/PhysRevD.77.011107
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. We select a sample of events with one completely reconstructed tag B in a hadronic decay mode (B-->(DX-)-X-(*)0), and examine the rest of the event to search for a B+->tau(+)nu decay. We identify the tau lepton in the following modes: tau(+)-> e(+)nu<overline>nu</overline>, tau(+)->mu(+)nu(nu) over bar, tau(+)->pi(+)(nu) over bar, and tau(+)->pi(+)pi(0)(nu) over bar. We find a 2.2 sigma excess in data and measure a branching fraction of B(B+->tau(+)nu)=(1.8(-0.8)(+0.9)(stat.)+/- 0.4(bkg. syst.)+/- 0.2(other syst.))x10(-4). We calculate the product of the B meson decay constant f(B) and [V-ub] to be f(B)center dot[V-ub]=(10.1(-2.5)(+2.3)(stat.)(-1.5)(+1.2)(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 (Particles, Fields, Gravitation and Cosmology) |
| Publisher: | American Physical Society |
| ISSN: | 1550-7998 |
| Official Date: | January 2008 |
| Volume: | Vol.77 |
| Number: | No.1 |
| Number of Pages: | 9 |
| Identification Number: | 10.1103/PhysRevD.77.011107 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| URI: | http://wrap.warwick.ac.uk/id/eprint/30546 |
Data sourced from Thomson Reuters' Web of Knowledge
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