Aubert, B;
Bona, M;
Boutigny, D;
Karyotakis, Y;
Lees, JP;
Poireau, V;
Prudent, X;
... BABAR Collaboration; + view all
(2007)
Evidence for B-0 ->rho(0)rho(0) decays and implications for the Cabibbo-Kobayashi-Maskawa angle alpha.
PHYS REV LETT
, 98
(11)
, Article 111801. 10.1103/PhysRevLett.98.111801.
![[thumbnail of 1303839.pdf]](https://discovery.ucl.ac.uk/style/images/fileicons/application_pdf.png) Preview |
PDF
1303839.pdf Download (223kB) |
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.
| Type: | Article |
|---|---|
| Title: | Evidence for B-0 ->rho(0)rho(0) decays and implications for the Cabibbo-Kobayashi-Maskawa angle alpha |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.98.111801 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.98.111801 |
| Language: | English |
| Additional information: | © 2007 The American Physical Society |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1303839 |
Archive Staff Only
 |
View Item |
