Study of B0ρ+ρ decays and constraints on the CKM angle α

B. Aubert et al. (BABAR Collaboration)
Phys. Rev. D 76, 052007 – Published 28 September 2007

Abstract

We present results from an analysis of B0ρ+ρ decays using (383.6±4.2)×106 BB¯ pairs collected by the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. The measurements of the B0ρ+ρ branching fraction, longitudinal polarization fraction fL, and the CP-violating parameters Slong and Clong are as follows: B(B0ρ+ρ)=(25.5±2.1(stat)3.9+3.6(syst))×106, fL=0.992±0.024(stat)0.013+0.026(syst), Slong=0.17±0.20(stat)0.06+0.05(syst), Clong=0.01±0.15(stat)±0.06(syst). We determine the unitarity triangle angle α, using an isospin analysis of Bρρ decays. One of the two solutions, α=[73.1,117.0]° at 68% confidence level, is compatible with standard model-based fits of existing data. Constraints on the unitarity triangle are also evaluated using an SU(3) symmetry-based approach.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
4 More
  • Received 15 May 2007

DOI:https://doi.org/10.1103/PhysRevD.76.052007

©2007 American Physical Society

Authors & Affiliations

Click to Expand

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 76, Iss. 5 — 1 September 2007

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×