Search:
Computing and Library Services - delivering an inspiring information environment

Evidence for B0→ρ0ρ0 Decays and Implications for the Cabibbo-Kobayashi-Maskawa Angle α

Aubert, B. et al. (2007) Evidence for B0→ρ0ρ0 Decays and Implications for the Cabibbo-Kobayashi-Maskawa Angle α. Physical Review Letters, 98 (11). p. 111801. ISSN 0031-9007

Metadata only available from this repository.

Abstract

We search for the decays B0→ρ0ρ0, B0→ρ0f0(980), and B0→f0(980)f0(980) in a sample of about 384×106 Υ(4S)→BB̅ decays collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at Stanford Linear Accelerator Center. We find evidence for B0→ρ0ρ0 with 3.5σ significance and measure the branching fraction B=(1.07±0.33±0.19)×10-6 and longitudinal polarization fraction fL=0.87±0.13±0.04, where the first uncertainty is statistical, and the second is systematic. The uncertainty on the Cabibbo-Kobayashi-Maskawa quark-mixing matrix unitarity angle α due to penguin contributions in B→ρρ decays is 18° at the 1σ level. We also set upper limits on the B0→ρ0f0(980) and B0→f0(980)f0(980) decay rates.

Item Type: Article
Subjects: Q Science > QC Physics
Schools: School of Applied Sciences
Depositing User: Sharon Beastall
Date Deposited: 31 Mar 2011 12:39
Last Modified: 31 Mar 2011 12:39
URI: http://eprints.hud.ac.uk/id/eprint/9990

Item control for Repository Staff only:

View Item

University of Huddersfield, Queensgate, Huddersfield, HD1 3DH Copyright and Disclaimer All rights reserved ©