Email RIS file
Bookmark
Report an Issue

Evidence for an excess of B to D(*) Tau Nu decays [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy. Office of Science, 2012.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
8 pages : digital, PDF file
Additional Creators:
SLAC National Accelerator Laboratory, United States. Department of Energy. Office of Science, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access:
Free-to-read Unrestricted online access
Summary:
Based on the full BABAR data sample, we report improved measurements of the ratios R(D{sup (*)}) = Β({bar B} → D{sup (*)} τ⁻{bar ν}{sub τ})/Β({bar B} → D{sup (*)} ℓ⁻{bar ν}{sub ℓ}), where ℓ is either e or μ. These ratios are sensitive to new physics contributions in the form of a charged Higgs boson. We measure R(D) = 0.440 ± 0.058 ± 0.042 and R(D*) = 0.332 ± 0.024 ± 0.018, which exceed the Standard Model expectations by 2.0σ and 2.7σ, respectively. Taken together, our results disagree with these expectations at the 3.4σ level. This excess cannot be explained by a charged Higgs boson in the type II two-Higgs-doublet model. We also report the observation of the decay {bar B} → Dτ⁻ {bar ν}{sub τ}, with a significance of 6.8σ.
Report Numbers:
E 1.99:slac-pub-15028
slac-pub-15028
Subject(s):
Other Subject(s):
Note:
Published through SciTech Connect.
10/09/2012.
"slac-pub-15028"
"arXiv:1205.5442"
Phys.Rev.Lett.109:101802,2012 109 10 ISSN 0031--9007 FT
Lees, J.P.; Poireau, V.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G.; Khan, A.; Schroeder, T.; Blinov, V.E.; Koch, H.; Mattison, T.S.; Hearty, C.; Asgeirsson, D.J.; McKenna, J.A.; So, R.Y.; Brown, David Nathan.
Funding Information:
AC02-76SF00515
View MARC record | catkey: 14705987