Using a high statistics sample of photoproduced charm particles from the FOCUS experiment at Fermilab, we compare the lifetimes of neutral D mesons decaying via D0 → K- π+ and K-K+ to measure the lifetime differences between CP even and CP odd final states. These measurements bear on the phenomenology of D0 -D̄0 mixing. If the D0 → K- π+ is an equal mixture of CP even and CP odd eigenstates, we measure y(CP) = (Γ(CP even) - Λ(CP odd))/(Λ(CP even)+ Λ(CP odd)) = 0.0342 ± 0.0139 ± 0.0074. (C) 2000 Elsevier Science B.V.
|Number of pages||9|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 2000 Jul 13|
Bibliographical noteFunding Information:
We wish to acknowledge the assistance of the staffs of Fermi National Accelerator Laboratory, the INFN of Italy, and the physics departments of the collaborating institutions. This research was supported in part by the U.S. National Science Foundation, the U.S. Department of Energy, the Italian Istituto Nazionale di Fisica Nucleare and Ministero dell'Università e della Ricerca Scientifica e Tecnologica, the Brazilian Conselho Nacional de Desenvolvimento Cientı́fico e Tecnológico, CONACyT-México, the Korean Ministry of Education, and the Korean Science and Engineering Foundation.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics