Aubert, B;
Barate, R;
Boutigny, D;
Couderc, F;
Karyotakis, Y;
Lees, JP;
Poireau, V;
... BaBar Collaboration; + view all
(2005)
Limit on the B-0 ->rho(0)rho(0) branching fraction and implications for the Cabibbo-Kobayashi-Maskawa angle alpha.
PHYS REV LETT
, 94
(13)
, Article 131801. 10.1103/PhysRevLett.94.131801.
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Abstract
We search for the decay B-0->rho(0)rho(0) in a data sample of about 227x10(6) Upsilon(4S)-> B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at SLAC. We find no significant signal and set an upper limit of 1.1x10(-6) at 90% C.L. on the branching fraction. As a result, the uncertainty due to penguin contributions on the Cabibbo-Kobayashi-Maskawa unitarity angle alpha measured in B ->rho rho decays is decreased to 11 degrees at 68% C.L.
| Type: | Article |
|---|---|
| Title: | Limit on the B-0 ->rho(0)rho(0) branching fraction 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.94.131801 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.94.131801 |
| Language: | English |
| Additional information: | © 2005 The American Physical Society |
| Keywords: | DECAYS |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences 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-pp.ucl.ac.uk/id/eprint/1303709 |
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