sin2phi_2(alpha)) from Belle
High Energy Physics - Experiment
2007-05-23 v1
Abstract
We present a measurement of CP-violating asymmetries in B0 -> pi+pi- decays based on 41.8 fb-1 data sample collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. From the asymmetry in the distribution of the time intervals between the two B meson decay points, we obtain the CP-violating asymmetry parameters S_pipi = -1.21 + 0.38 - 0.27 (stat) + 0.16 - 0.13 (syst) and A_pipi = +0.94 + 0.25 - 0.31 (stat) +- 0.09 (syst).
Cite
@article{arxiv.hep-ex/0206066,
title = {sin2phi_2(alpha)) from Belle},
author = {Eunil Won},
journal= {arXiv preprint arXiv:hep-ex/0206066},
year = {2007}
}
Comments
8 pages, 2 figures, Flavor Physics and CP Violation (FPCP) 16-18 May 2002, University of Pennsylvania, Philadelphia, USA