Aubert, B;
Barate, R;
Boutigny, D;
Couderc, F;
Gaillard, JM;
Hicheur, A;
Karyotakis, Y;
... BaBar Collaboration; + view all
(2004)
Search for B-+/-->[K--/+pi(+/-)](D)K-+/- and upper limit on the b -> u amplitude in B-+/--> DK +/-.
PHYS REV LETT
, 93
(13)
, Article 131804. 10.1103/PhysRevLett.93.131804.
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Abstract
We search for B+/--->[K(-/+)pi(+/-)](D)K+/- decays, where [K(-/+)pi(+/-)](D) indicates that the K(-/+)pi(+/-) pair originates from the decay of a D-0 or (D) over bar (0). Results are based on 120x10(6) Y(4S)-->BB<top></top> decays collected with the BABAR detector at SLAC. We set an upper limit on the ratio R-Kpi=[Gamma(B+-->[K(-)pi(+)](D)K+)+Gamma(B--->[K(+)pi(-)](D)K-)][Gamma(B+-->[K(+)pi(-)](D)K+)+Gamma(B--->[K(-)pi(+)](D)K-)]</den></fraction><0.026 (90% C.L.). This constrains the amplitude ratio r(B)equivalent toparallel toA(B--->(DK-)-K-0)/A(B--->(DK-)-K-0)parallel to<0.22 (90% C.L.), consistent with expectations. The small value of r(B) favored by our analysis suggests that the determination of the Cabibbo-Kobayashi-Maskawa phase gamma from B-->DK will be difficult.
| Type: | Article |
|---|---|
| Title: | Search for B-+/-->[K--/+pi(+/-)](D)K-+/- and upper limit on the b -> u amplitude in B-+/--> DK +/- |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.93.131804 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.93.131804 |
| Language: | English |
| Additional information: | The American Physical Society |
| Keywords: | GAMMA |
| 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/1303677 |
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