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Observation of D0−D ̄ ̄ ̄0 Mixing Using the CDF II Detector

Aaltonen T.
•
Amerio S.
•
Amidei D.
altro
Zucchelli S.
2013
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
We measure the time dependence of the ratio of decay rates for D0→K+π− to the Cabibbo-favored decay D0→K−π+. The charge conjugate decays are included. A signal of 3.3×10^4 D*+→π+D0, D0→K+π− 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=1.96 TeV. Assuming CP conservation, we search for D0-D ̄ ̄ ̄0 mixing and measure the mixing parameters to be RD=(3.51±0.35)×10−3, y′=(4.3±4.3)×10−3, and x'2=(0.08±0.18)×10−3. We report Bayesian probability intervals in the x'2-y′ 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.
DOI
10.1103/PhysRevLett.111.231802
WOS
WOS:000328616300011
Archivio
http://hdl.handle.net/11390/983948
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84890289301
Diritti
metadata only access
Web of Science© citazioni
29
Data di acquisizione
Mar 28, 2024
Visualizzazioni
1
Data di acquisizione
Jun 8, 2022
Vedi dettagli
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