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Observation of the semileptonic decays B→D*τ-ν̄τ and evidence for B→Dτ-ν̄τ

Abstract:

We present measurements of the semileptonic decays B-→D0τ- ν̄τ, B-→D*0τ-ν̄τ, B̄0→D+τ- ν̄τ, and B̄0→D*+τ-ν̄τ, which are potentially sensitive to non-standard model amplitudes. The data sample comprises 232×106 Υ(4S)→BB̄ decays collected with the BABAR detector. From a combined fit to B- and B̄0 channels, we obtain the branching fractions B(B→Dτ-ν̄τ)=(0.86±0.24±0. 11±0.06)% and B(B→D*τ-ν̄τ)=(1.62±0. 31±0.10±0.05)% (normalized for the B̄0), where the uncertainties are statistical, systematic, an...

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Authors


Boutigny, D More by this author
Karyotakis, Y More by this author
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Journal:
Physical Review Letters
Volume:
100
Issue:
2
Publication date:
2008-01-15
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:11070673-35d5-4875-ac59-5f78d2debe95
Source identifiers:
211394
Local pid:
pubs:211394
Language:
English

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