Measurement of phi1 using B --> D[Ks pi+ pi-] h0

Details Measurement of phi1 using B --> D[Ks pi+ pi-] h0 Measurement of phi1 using B --> D[Ks pi+ pi-] h0

2005-07-14

arxiv.org/abs/hep-ex/0507065v1

Physics

High Energy Physics

High Energy Physics - Experiment

12 pages, 7 figures, submitted to the Lepton Photon 2005 conference in Uppsala, Sweden and to the HEP2005 Europhysics Conferen

Scientific paper

We present a preliminary measurement of the angle phi1 of the CKM Unitarity Triangle using time-dependent analysis of D -> Ks pi+ pi- decays produced in neutral B meson decay to a neutral D meson and a light meson (B -> D h). The method allows one to directly extract the value of 2phi1. The ambiguity between 2phi1 and pi-2phi1 in the measurement of sin(2phi1) can then be resolved. We obtain phi1=16 +- 21 +- 11. The 95% CL region including systematic error is -30

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