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Observation of D0-D?0 mixing using the CDF II detector

Abstract: ABSTRACT: We measure the time dependence of the ratio of decay rates for D0 ! Kþ to the Cabibbo-favored decay D0 ! K þ. The charge conjugate decays are included. A signal of 3:3 104 D þ ! þD0, D0 ! Kþ decays is obtained with D0 proper decay times between 0.75 and 10 mean D0 lifetimes. The data were recorded with the CDF II detector at the Fermilab Tevatron and correspond to an integrated luminosity of 9:6 fb 1 for pp- collisions at s ¼ 1:96 TeV. Assuming CP conservation, we search for D0-D- 0 mixing and measure the mixing parameters to be RD ¼ ð3:51 ± 0:35Þ 10 3, y0 ¼ ð4:3 ± 4:3Þ 10 3, and x02 ¼ ð0:08 ± 0:18Þ 10 3. We report Bayesian probability intervals in the x02-y0 plane and find that the significance of excluding the no-mixing hypothesis is equivalent to 6.1 Gaussian standard deviations, providing the second observation of D0-D- 0 mixing from a single experiment.

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 Autoría: Aaltonen T., Amerio S., Amidei D., Anastassov A., Annovi A., Antos J., Apollinari G., Appel J.A., Arisawa T., Artikov A., Asaadi J., Ashmanskas W., Auerbach B., Aurisano A., Azfar F., Badgett W., Bae T., Barbaro-Galtieri A., Barnes V.E., Barnett B.A., Barria P., Bartos P., Bauce M., Bedeschi F., Behari S., Bellettini G., Bellinger J., Benjamin D., Beretvas A., Bhatti A., Bland K.R., Blumenfeld B., Bocci A., Bodek A., Bortoletto

 Fuente: Physical Review Letters, 2013,111(23), 231802

Editorial: American Physical Society

 Fecha de publicación: 04/12/2013

Nº de páginas: 8

Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevLett.111.231802

ISSN: 0031-9007,1079-7114

Url de la publicación: https://doi.org/10.1103/PhysRevLett.111.231802