# Measurement of $\gamma$ in $B^{\mp} \to D^{(*)} K^{\mp}$ and $B^{\mp} \to D K^{*\mp}$ decays with a Dalitz analysis of $D \to K^0_s \pi^- \pi^+$

Abstract : We present a measurement of the Cabibbo-Kobayashi-Maskawa CP-violating phase gamma with a Dalitz plot analysis of neutral D-meson decays to the Ks pi- pi+ final state from B-+ -> D(*) K-+ and B-+ -> D K*-+ decays, using a sample of 227 million BBbar pairs collected by the BaBar detector. We measure gamma = 67 +/- 28 +/- 13 +/- 11, where the first error is statistical, the second is the experimental systematic uncertainty and the third reflects the Dalitz model uncertainty. This result suffers from a two-fold ambiguity. The contribution to the Dalitz model uncertainty due to the description of the pipi S-wave in D0 -> Ks pi- pi+, evaluated using a K-matrix formalism, is found to be 3 degrees.
Document type :
Conference papers

http://hal.in2p3.fr/in2p3-00025586
Contributor : Dominique Girod <>
Submitted on : Wednesday, February 8, 2006 - 11:27:55 AM
Last modification on : Sunday, June 20, 2021 - 3:34:42 AM

### Citation

B. Aubert, R. Barate, D. Boutigny, F. Couderc, Y. Karyotakis, et al.. Measurement of $\gamma$ in $B^{\mp} \to D^{(*)} K^{\mp}$ and $B^{\mp} \to D K^{*\mp}$ decays with a Dalitz analysis of $D \to K^0_s \pi^- \pi^+$. International Europhysics Conference On High-Energy Physics (HEP 2005), Jul 2005, Lisbon, Portugal. pp.1-22. ⟨in2p3-00025586⟩

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