| Thème(s) : |
 |
Physique/Physique des Hautes Energies - Expérience
|
 |
| Titre : |
 |
Measurement of D0-D0bar Mixing and CP Violation in Two-Body D0 Decays |
 |
| Auteur : |
 |
J. P. Lees1, V. Poireau1, V. Tisserand1, N. Arnaud2, M. Davier2, D. Derkach2, G. Grosdidier2, F. Le Diberder2, A. M. Lutz2, B. Malaescu2, P. Roudeau2, M. H. Schune2, A. Stocchi2, G. Wormser2, D. Bernard3, M. Verderi3, S. Emery4, G. Hamel de Monchenault4, G. Vasseur4, Ch. Yèche4, S. Akar5, E. Ben-Haim5, M. Bomben5, G.R. Bonneaud5, H. Briand5, G. Calderini5, J. Chauvau5, O. Hamon5, Ph. Leruste5, G. Marchiori5, J. Ocariz5, S. Sitt5 |
 |
| Laboratoire : |
 |
|
 |
| Résumé : |
 |
We present a measurement of D0-D0bar mixing and CP violation using the ratio of lifetimes simultaneously extracted from a sample of D0 mesons produced through the flavor-tagged process D*+ -> D0 pi+, where D0 decays to K-+pi+-, K-K+, or pi-pi+, along with the untagged decays D0 -> K-+pi+- and D0 -> K-K+. The lifetimes of the CP-even, Cabibbo-suppressed modes K-K+ and pi-pi+ are compared to that of the CP-mixed mode K-+pi+- in order to measure yCP and DeltaY. We obtain yCP = [0.72 +- 0.18 (stat) +- 0.12 (syst)]% and DeltaY = [0.09 +- 0.26 (stat) +- 0.06 (syst)]%, where DeltaY constrains possible CP violation. The yCP result excludes the null mixing hypothesis at 3.3 sigma significance. This analysis is based on an integrated luminosity of 468 fb-1 collected with the BaBar detector at the PEP-II asymmetric-energy e+e- collider. |
 |
| Collaboration/Projet : |
 |
BABAR |
 |
|
| Type de publication : |
 |
Articles dans des revues avec comité de lecture |
 |
Date de publication ou d'écriture : |
 |
2013 |
 |
| Nom du périodique : |
 |
| Physical Review D (Phys. Rev. D) |
| Publisher |
American Physical Society |
| ISSN |
1550-7998 (eISSN : 1550-2368) |
|
 |
| Volume : |
 |
87 |
 |
| Page/Article : |
 |
012004 |
 |
|
| Commentaire : |
 |
15 pages, 15 postscript figures, submitted to PRD - See paper for full list of authors |
 |