English

Results for \phi_1 and \phi_2 from Belle

High Energy Physics - Experiment 2013-01-23 v2 High Energy Physics - Phenomenology

Abstract

We present a summary of measurements sensitive to the CKM angles \phi_1 and \phi_2, performed by the Belle experiment using the final data sample of 772 \times 10^{6} BBˉB\bar{B} pairs at the \Upsilon(4S) resonance produced at the KEK asymmetric e^+e^- collider. We discuss CP asymmetries from the decays B0ccˉK0B^{0}\to c\bar{c} K^{0}, D()+D()D^{(*)+}D^{(*)-} which are sensitive to \phi_1 and from Bπ+πB \to \pi^{+} \pi^{-}, a1±πa_1{\pm}\pi^{\mp} being sensitive to \phi_2. Furthermore the measurement of the branching fraction of B0ρ0ρ0B^{0}\to \rho^0\rho^0 decays and fraction of longitudinal polarization in this decay is presented and used to constrain \phi_2 with an isospin analysis in the BρρB\to \rho\rho system.

Keywords

Cite

@article{arxiv.1301.0434,
  title  = {Results for \phi_1 and \phi_2 from Belle},
  author = {P. Vanhoefer},
  journal= {arXiv preprint arXiv:1301.0434},
  year   = {2013}
}

Comments

Proceedings of CKM2012, the 7th International Workshop on the CKM Unitarity Triangle, Cincinnati, USA, 6-10 September 2012

R2 v1 2026-06-21T23:03:21.411Z