Extracting beta and the new D_{sJ} resonances

Details Extracting beta and the new D_{sJ} resonances Extracting beta and the new D_{sJ} resonances

2004-07-29

arxiv.org/abs/hep-ph/0407330v1

Int.J.Mod.Phys. A19 (2004) 5501-5512

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, no figures, Talk presented at MRST 2004

Scientific paper

10.1142/S0217751X0402275X

The three body decays $B \to D^{(*)} \bar{D}^{(*)} K_s$ may be used to measure both $\sin{2\beta}$ and $\cos{2\beta}$. Crucial to the $\cos{2\beta}$ measurement is the resonant contribution to the three body decay from p-wave excited $D_s$ states. If these p-wave states are the newly discovered $D_s(2317)$ and $D_s(2460)$ then they are below the $D^{(*)} K$ threshold and hence do not contribute to $B \to D^{(*)} \bar{D}^{(*)} K_s$. The three body decays can then be used to measure $\sin{2\beta}$ without resonant dilution and to look for new physics in $ b \to c \bar{c} s $ transition.

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