A Study of $D^0$ - $$\overline{D^0}$$ Mixing

Thesis/Dissertation · Tue Mar 01 04:00:00 EST 1988

DOI:https://doi.org/10.2172/1433213· OSTI ID:1433213

Browder, Thomas E. ^[1]

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1. UC, Santa Barbara

We present a study of $D^0$ mixing from Fermilab experiment E691, using events of the type $$D^{*+} \to \pi^+ D^0$$ with $$D^0 \to K^+ \pi^-$$ and $$D^0 \to K^+ \pi^- \pi^+ \pi^-$$. The charge of the bachelor pion tags the charm quantum number of the $D^0$ meson at production. The decay time is used to separate mixing from doubly Cabibbo-suppressed decays. We observe no evidence for mixing in either mode. Combining the results from the two decay modes, we find $$r_M$$ = 0.0005 $$\pm$$ .0020 or $$r_M$$ < .0037 at the 90% confidence level, where $$r_M$$ is the ratio of wrong sign decays from mixing to right sign decays. We al50 present limits on doubly Cabibbo suppressed decays and consider the effect of possible interference.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1433213
• Report Number(s): FERMILAB-THESIS-1988-11; UCSB-HEP-88-4; UMI-89-04124-MC; 261596
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS