Aubert, B. et al. (2008) Search for B^{+}→τ^{+}ν decays with hadronic B tags. Physical Review D, 77 (1). 011107. ISSN 1550-7998
Metadata only available from this repository.Abstract
We present a search for the decay B+→τ+ν using 383×106 BB̅ pairs collected at the Υ(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-→D(*)0X-), and examine the rest of the event to search for a B+→τ+ν decay. We identify the τ lepton in the following modes: τ+→e+νν̅ , τ+→μ+νν̅ , τ+→π+ν̅ , and τ+→π+π0ν̅ . We find a 2.2σ excess in data and measure a branching fraction of B(B+→τ+ν)=(1.8-0.8+0.9(stat.)±0.4(bkg. syst.)±0.2(other syst.))×10-4. We calculate the product of the B meson decay constant fB and |Vub| to be fB·|Vub|=(10.1-2.5+2.3(stat.)-1.5+1.2(syst.))×10-4 GeV.
Item Type: | Article |
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Subjects: | Q Science > QC Physics |
Schools: | School of Applied Sciences |
Related URLs: | |
Depositing User: | Sharon Beastall |
Date Deposited: | 07 Jul 2011 08:16 |
Last Modified: | 28 Aug 2021 11:08 |
URI: | http://eprints.hud.ac.uk/id/eprint/10905 |
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