Measurement of phi_3 in B->D(*)K Decays at Belle

A. Poluektov

Measurement of phi_3 in B->D(*)K Decays at Belle

High Energy Physics - Experiment 2019-08-14 v1

Authors: A. Poluektov

Abstract

We present a measurement of the unitarity triangle angle phi_3 using a Dalitz plot analysis of the three-body decay of the D0 meson from the B+- -> D(*)K+- process. The method employs the interference between D0 and D0bar to extract both the weak and strong phases. We apply this method to the 140 fb-1 of data collected by Belle experiment. The analysis uses B+- -> DK+- and B+- -> D*K+- with D*->Dpi0 modes, where the neutral D meson decays into K_s pi+ pi-. From a combined maximum likelihood fit of B+- -> DK+- and B+- -> D*K+- modes, we obtain phi_3=81^{\circ}+-19^{\circ}+-13(syst)+-11^{\circ}(model). The 95% confidence interval is 35^{\circ}<phi_3<127^{\circ}.

Keywords

φ3 unitarity triangle Dalitz plot B→D(*)K Belle experiment CP violation

Cite

@article{arxiv.hep-ex/0405048,
  title  = {Measurement of phi_3 in B->D(*)K Decays at Belle},
  author = {A. Poluektov},
  journal= {arXiv preprint arXiv:hep-ex/0405048},
  year   = {2019}
}