Combined analysis of the decays τ − → K S π − ν τ and τ − → K − ην τ

Effect of H ± on B ± → τ ± ν τ and D ± s → μ ± ν μ , τ ± ν τ

The recent observation of the purely leptonic decay B → τντ at the B factories permits a sizeable contribution from a charged Higgs boson (H). Such a H would also contribute to the decays D s → μ νμ and D ± s → τ ντ , which are being measured with increasing precision at CLEO-c. We show that the branching ratios of D s → μ νμ and D s → τ ντ could be suppressed by up to 10% from the Standard Mod...

τ − ν τ Decays and Implications for Charged Higgs Bosons

A High Statistics Study of the Decay τ − → π − π 0 ν τ

K. Abe, K. Abe, I. Adachi, H. Aihara, K. Aoki, K. Arinstein, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, T. Aziz, S. Bahinipati, A. M. Bakich, V. Balagura, Y. Ban, S. Banerjee, E. Barberio, M. Barbero, A. Bay, I. Bedny, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. Bozek, M. Bračko, 22, 15 J. Brodzicka, T. E. Browder, M.-C. Chang, P. Chang, Y. Chao, A. Chen, K.-F. Chen, W. T. Chen, B....

Search for B^{+}→K^{+}τ^{+}τ^{-} at the BaBar Experiment.

We search for the rare flavor-changing neutral current process B^{+}→K^{+}τ^{+}τ^{-} using data from the BABAR experiment. The data sample, collected at the center-of-mass energy of the ϒ(4S) resonance, corresponds to a total integrated luminosity of 424  fb^{-1} and to 471×10^{6}  BB[over ¯] pairs. We reconstruct one B meson, produced in the ϒ(4S)→B^{+}B^{-} decay, in one of many hadronic deca...

The role of K ∗ 0 ( 1430 ) in D → PK and τ → KPν τ decays

We consider the scalar form factor in the weak current matrix element < PK|jμ|0 >, P = π, η, η′. It obtains the contributions from the scalar meson resonance K∗ 0(1430) and from the scalar projection of the vector meson K∗(892) resonance. We analyze decay amplitudes of the Cabibbo suppressed decays D → KP , P = π, η, η′ using the factorization approach. The form factors of the relevant matrix e...