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Measurements of charged current lepton universality and |Vus| using tau lepton decays to e- ν(e) ν(τ), μ- ν(μ) ν(τ), π- ν(τ), and K- ν(τ).

Abstract:

Using 467  fb(-1) of e+e- annihilation data collected with the BABAR detector, we measure (B(τ- → μ- ν(μ) ν(τ)))/(B(τ- → e- ν(e) ν(τ))) =(0.9796±0.0016±0.0036), (B(τ- → π- ν(τ)))/(B(τ- → e- ν(e) ν(τ))) = (0.5945±0.0014±0.0061), and (B(τ- → K- ν(τ)))/(B(τ- → e- ν(e) ν(τ))) = (0.03882±0.00032±0.00057), where the uncertainties are statistical and systematic, respectively. From these precision τ measurements, we test the standard model assumption of μ-e and τ-μ charge current lepton universality ...

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Publication status:
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Authors


Karyotakis, Y More by this author
Poireau, V More by this author
Prencipe, E More by this author
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Journal:
Physical review letters
Volume:
105
Issue:
5
Pages:
051602
Publication date:
2010-07-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:1fee63f2-a019-4e0e-8b5c-870f211f99b7
Source identifiers:
211338
Local pid:
pubs:211338
Language:
English
Keywords:

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