Aubert, B;
Barate, R;
Boutigny, D;
Couderc, F;
Gaillard, JM;
Hicheur, A;
Karyotakis, Y;
... BABAR Collaboration; + view all
(2004)
Study of the decay B-0((B)over-bar(0))->rho(+)rho(-), and constraints on the Cabibbo-Kobayashi-maskawa angle alpha.
PHYS REV LETT
, 93
(23)
, Article 231801. 10.1103/PhysRevLett.93.231801.
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Abstract
Using a data sample of 89x10(6) Y(4S)-->B (B) over bar decays collected with the BABAR detector at the PEP-II asymmetric B Factory at SLAC, we measure the B-0((B) over bar (0))-->rho(+)rho(-) branching fraction as [30+/-4(stat)+/-5(syst)]x10(-6) and a longitudinal polarization fraction of f(L)=0.99+/-0.03(stat)(-0.03)(+0.04)(syst). We measure the time-dependent-asymmetry parameters of the longitudinally polarized component of this decay as C-L=-0.17+/-0.27(stat)+/-0.14(syst) and S-L=-0.42+/-0.42(stat)+/-0.14(syst). We exclude values of alpha between 19degrees and 71degrees (90% C.L.).
| Type: | Article |
|---|---|
| Title: | Study of the decay B-0((B)over-bar(0))->rho(+)rho(-), and constraints on the Cabibbo-Kobayashi-maskawa angle alpha |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.93.231801 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.93.231801 |
| Language: | English |
| Additional information: | The American Physical Society |
| Keywords: | HIGH-ENERGY-PHYSICS, CP-ASYMMETRIES |
| 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/1303695 |
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