Acosta, D;
Affolder, T;
Akimoto, T;
Albrow, MG;
Ambrose, D;
Amerio, S;
Amidei, D;
... CDF Collaboration; + view all
(2005)
Measurement of partial widths and search for direct CP violation in D-0 meson decays to K-K+ and pi(-)pi(+).
Physical Review Letters
, 94
, Article 122001. 10.1103/PhysRevLett.94.122001.
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Abstract
We present a measurement of relative partial widths and decay rate CP asymmetries in K-K+ and pi(-)pi(+) decays of D-0 mesons produced in p(p) over bar collisions at root s = 1.96 TeV. We use a sample of 2x10(5) D*+-> D-0 pi(+) (and charge conjugate) decays with the D-0 decaying to K-pi(+), K-K+, and pi(-)pi(+), corresponding to 123 pb(-1) of data collected by the Collider Detector at Fermilab II experiment at the Fermilab Tevatron collider. No significant direct CP violation is observed. We measure Gamma(D-0 -> K-K+)/Gamma(D-0 -> K-pi(+)) = 0.0992 +/- 0.0011 +/- 0.0012, Gamma(D-0 ->pi(-)pi(+))/Gamma(D-0 -> K-pi(+)) = 0.035 94 +/- 0.000 54 +/- 0.000 40, A(CP)(K-K+) = (2.0 +/- 1.2 +/- 0.6)%, and A(CP)(pi(-)pi(+)) = (1.0 +/- 1.3 +/- 0.6)%, where, in all cases, the first uncertainty is statistical and the second is systematic.
| Type: | Article |
|---|---|
| Title: | Measurement of partial widths and search for direct CP violation in D-0 meson decays to K-K+ and pi(-)pi(+) |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.94.122001 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.94.122001 |
| Language: | English |
| Additional information: | © 2005 The American Physical Society |
| Keywords: | FINAL-STATE INTERACTIONS, NONLEPTONIC DECAYS, CHARMED MESONS, CDF, TRACKER |
| 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/131756 |
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