Improved measurement of CP-violating parameters in rho+rho- decays
High Energy Physics - Experiment
2019-08-14 v3
Abstract
We present a measurement of the CP-violating asymmetry in rho+rho- decays using 535 million BBbar pairs collected with the Belle detector at the KEKB e+e- collider. We measure CP-violating coefficients A = 0.16 +- 0.21(stat) +- 0.07 (syst) and S = 0.19 +- 0.30(stat) +- 0.07 (syst}. These values are used to determine the unitarity triangle angle phi_2 using an isospin analysis; the solution consistent with Standard Model lies in the range 53 < phi_2 < 114 deg. at 90 C.L.
Cite
@article{arxiv.hep-ex/0702009,
title = {Improved measurement of CP-violating parameters in rho+rho- decays},
author = {A. Somov and A. J. Schwartz},
journal= {arXiv preprint arXiv:hep-ex/0702009},
year = {2019}
}
Comments
6 pages, 4 figures, presented at JPS/DPF 2006 (Added KEK, BELLE preprint numbers, submitted to PRD(RC))