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Evidence for B0→ρ0ρ0 decays and implications for the Cabibbo-Kobayashi-Maskawa angle α
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BABAR Collaboration (Including:
). (2007) Evidence for B0→ρ0ρ0 decays and implications for the Cabibbo-Kobayashi-Maskawa angle α. Physical Review Letters, Vol.98 (No.11). Article: 111801. ISSN 0031-9007 Full text not available from this repository.
Official URL: http://dx.doi.org/10.1103/PhysRevLett.98.111801
Abstract
We search for the decays B-0 ->rho(0)rho(0), B-0 ->rho(0)f(0)(980), and B-0 -> f(0)(980)f(0)(980) in a sample of about 384x10(6) Upsilon(4S)-> B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at Stanford Linear Accelerator Center. We find evidence for B-0 ->rho(0)rho(0) with 3.5 sigma significance and measure the branching fraction B=(1.07 +/- 0.33 +/- 0.19)x10(-6) and longitudinal polarization fraction f(L)=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 alpha due to penguin contributions in B ->rho rho decays is 18 degrees at the 1 sigma level. We also set upper limits on the B-0 ->rho(0)f(0)(980) and B-0 -> f(0)(980)f(0)(980) decay rates.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Science > Physics |
| Journal or Publication Title: | Physical Review Letters |
| Publisher: | American Physical Society |
| ISSN: | 0031-9007 |
| Date: | 16 March 2007 |
| Volume: | Vol.98 |
| Number: | No.11 |
| Number of Pages: | 7 |
| Page Range: | Article: 111801 |
| Identification Number: | 10.1103/PhysRevLett.98.111801 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| URI: | http://wrap.warwick.ac.uk/id/eprint/32218 |
Data sourced from Thomson Reuters' Web of Knowledge
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