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Limits on D0-macro D0 mixing and CP violation from the ratio of lifetimes for decay to K-pi+, K-K+, and pi- pi+ |
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| Authors: | Aubert B Barate R Boutigny D Gaillard J-M Hicheur A Karyotakis Y Lees J P Robbe P Tisserand V Zghiche A Palano A Pompili A Chen J C Qi N D Rong G Wang P Zhu Y S Eigen G Ofte I Stugu B Abrams G S Borgland A W Breon A B Brown D N Button-Shafer J Cahn R N Charles E Day C T Gill M S Gritsan A V Groysman Y Jacobsen R G Kadel R W Kadyk J Kerth L T Kolomensky Yu G Kral J F Kukartsev G LeClerc C Levi M E Lynch G Mir L M Oddone P J Orimoto T J Pripstein M Roe N A Romosan A Ronan M T Shelkov V G Telnov A V Wenzel W A Ford K Harrison T J Hawkes C M Knowles D J Morgan S E Penny R C Watson A T Watson N K |
| Institution: | Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France. |
| Abstract: | We present a measurement of D0-macro D0 mixing parameters using the ratios of lifetimes extracted from samples of D0 mesons decaying to K-pi(+), K-K+, and pi(-)pi(+). Using 91 fb(-1) of data collected by the BABAR detector at the PEP-II asymmetric-energy B Factory, we obtain a value Y=0.8+/-0.4(stat.)(+0.5)(-0.4)(syst.)]%, which, in the limit of CP conservation, corresponds to the mixing parameter y=Delta Gamma/2 Gamma. Using the difference in lifetimes of D0 and macro D0 mesons, we obtain the CP-violation parameter Delta Y=-0.8+/-0.6(stat.)+/-0.2(syst.)]%. |
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