TY  - JOUR
AU  - BABAR Collaboration (Lees, J. P. et al
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
PY  - 2012
DA  - 2012//
TI  - Evidence for an Excess of (B)over-bar -> D-(*()) tau(-)(nu)over-bar(tau) Decays
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 101802
EP  - 8pp
VL  - 109
IS  - 10
PB  - Amer Physical Soc
AB  - Based on the full BABAR data sample, we report improved measurements of the ratios R(D-(*())) = B((B) over bar -> D-(*()) tau(-)(nu) over bar (tau))/B((B) over bar -> D-(*()) l(l)(-)(nu) over bar (l), where l is either e or mu. 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 2.0 sigma and 2.7 sigma, respectively. Taken together, our results disagree with these expectations at the 3.4 sigma level. This excess cannot be explained by a charged Higgs boson in the type II two-Higgs-doublet model.
SN  - 0031-9007
UR  - http://arxiv.org/abs/arXiv:1205.5442
UR  - https://doi.org/10.1103/PhysRevLett.109.101802
DO  - 10.1103/PhysRevLett.109.101802
LA  - English
N1  - WOS:000308394900005
ID  - BABARCollaborationLees_etal2012
ER  -