Aubert, B;
Barate, R;
Boutigny, D;
Couderc, F;
Karyotakis, Y;
Lees, JP;
Poireau, V;
... Neal, H; + view all
(2005)
Improved measurement of the Cabibbo-Kobayashi-Maskawa angle alpha using B-0(B)->rho(+)rho(-) decays.
PHYS REV LETT
, 95
(4)
, Article 041805. 10.1103/PhysRevLett.95.041805.
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Abstract
We present results from an analysis of B-0 ((B) over bar (0)) -> rho(+)p(-) using 232 x 10(6) Upsilon(4S) -> B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We measure the longitudinal polarization fraction f(L) = 0.978 +/- 0.014(stat)(-0.029)(+0.021)(syst) and the CP-violating parameters S-L = -0.33 +/- 0.24(stat)(-0.14)(+0.08)(syst) and C-L = -0.03 +/- 0.18(stat) +/- 0.09(syst). Using an isospin analysis of B -> rho rho decays, we determine the unitarity triangle parameter alpha. The solution compatible with the standard model is alpha = (100 +/- 13)degrees.
| Type: | Article |
|---|---|
| Title: | Improved measurement of the Cabibbo-Kobayashi-Maskawa angle alpha using B-0(B)->rho(+)rho(-) decays |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.95.041805 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.95.041805 |
| Language: | English |
| Additional information: | © 2005 The American Physical Society |
| 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.ucl.ac.uk/id/eprint/1303725 |
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