Aaltonen, T;
Amerio, S;
Amidei, D;
Anastassov, A;
Annovi, A;
Antos, J;
Apollinari, G;
... CDF Collaboration; + view all
(2014)
Measurement of indirect CP-violating asymmetries in D-0 -> K+K- and D-0 -> pi(+)pi(-) decays at CDF.
Physical Review D
, 90
(11)
, Article 111103(R). 10.1103/PhysRevD.90.111103.
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Abstract
We report a measurement of the indirect CP-violating asymmetries (AΓ) between effective lifetimes of anticharm and charm mesons reconstructed in D0→K+K− and D0→π+π− decays. We use the full data set of proton-antiproton collisions collected by the Collider Detector at Fermilab experiment and corresponding to 9.7 fb−1 of integrated luminosity. The strong-interaction decay D*+→D0π+ is used to identify the meson at production as D0 or D¯0. We statistically subtract D0 and D¯0 mesons originating from b-hadron decays and measure the yield asymmetry between anticharm and charm decays as a function of decay time. We measure AΓ(K+K−)=(−0.19±0.15(stat)±0.04(syst))% and AΓ(π+π−)=(−0.01±0.18(stat)±0.03(syst))%. The results are consistent with the hypothesis of CP symmetry and their combination yields AΓ=(−0.12±0.12)%.
| Type: | Article |
|---|---|
| Title: | Measurement of indirect CP-violating asymmetries in D-0 -> K+K- and D-0 -> pi(+)pi(-) decays at CDF |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevD.90.111103 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevD.90.111103 |
| Language: | English |
| Additional information: | Copyright © 2014 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 UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1466290 |
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