FOCUS Document 731-v1

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A measurement of lifetime differences in the neutral D meson system

Document #:
FOCUS-doc-731-v1
Document type:
Publication
Submitted by:
Jonathan A. Pellish
Updated by:
Jonathan A. Pellish
Document Created:
12 Aug 2004, 10:58
Contents Revised:
12 Aug 2004, 10:58
Metadata Revised:
14 Dec 2000, 11:00
Actually Revised:
25 Aug 2005, 11:02
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Abstract:
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- pi+ and K- K+ to measure the lifetime differences between CP even and CP odd final states. These measurements bear on the phenomenology of D0 - \bar{D0} mixing. If the D0 -> K- pi+ is an equal mixture of CP even and CP odd eigenstates, we measure y_CP = (Gamma(CP even) - Gamma(CP odd))/(Gamma(CP even) + Gamma(CP~odd)) = 0.0342 [+/-] 0.0139 [+/-] 0.0074.
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Published in Phys. Lett. B vol. 491 pg. 232.
Published in hep-ex/0004034.
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