The ϒ( nS )→ B c D s , B c D d decays with perturbative QCD approach

Determination of the angle γ from nonleptonic B c → D s D 0 decays

We note that the two body nonleptonic pure tree decays B± c → D± s D 0(D̄0) and the corresponding vector-vector modesB± c → D∗± s D∗0(D̄∗0) are well suited to extract the weak phase γ of the unitarity triangle. The CP violating phase γ can be determined without any uncertainties due to the absence of relative strong phase difference and also these decay modes are free from the penguin pollutions.

2 Study of Rare B + c → D ( ∗ ) + d , s l l̄ Decays

We study the rare decays of B + c → D (*)+ q l ¯ l (q = d, s and l = ν l , e, µ, τ) in the standard model. The form factors are evaluated in the light front and constituent quark models, respectively. We find that the decay branching ratios calculated in the two models for B + c → D + q l ¯ l agree well with each other, whereas those for B

in B ± → D ± s D 0 π 0 decays

B Decays to D

The e + e − annihilation data recorded with the BABAR detector has been used to study B 0 decays to D (*)+ s and D * − mesons. The production fraction of inclusive D (*)+ s and the corresponding momentum spectra have been determined. Exclusive decays B 0 → D * − D (*)+ s have been identified with a partial reconstruction technique and their branching ratios have been measured. Fully reconstruct...

6 Rare Kaon Decays B-counter C-counter D-counter

S. Pislak, P. Robmann and P. Tru ol, in collaboration with J. Egger, W. D. Herold, H. Kaspar, and H. Weyer, Paul{Scherrer{Institut, CH-5234 Villigen Brookhaven National Laboratory, Upton, NY-11973, USA University of New Mexico, Albuquerque, NM-87131, USA University of Pittsburgh, Pittsburgh, PA-15260, USA Yale University, Newhaven, CT-06511, USA Institute for Nuclear Research, Academy of Scien...