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Measurement of y(CP) in D-0-(D)over-bar(0) oscillation using quantum correlations in e(+)e(-) -> D-0(D)over-bar(0) at root s=3.773 GeV
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Number of Authors: 408
2015 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 744, 339-346 p.Article in journal (Refereed) Published
Abstract [en]

We report a measurement of the parameter y(CP) in D-0-(D) over bar (0) oscillations performed by taking advantage of quantum coherence between pairs of D-0(D) over bar (0) mesons produced in e(+)e(-) annihilations near threshold. In this work, doubly-tagged D-0(D) over bar (0) events, where one D decays to a CP eigenstate and the other D decays in a semileptonic mode, are reconstructed using a data sample of 2.92 fb(-1) collected with the BESIII detector at the center-of-mass energy of root s = 3.773 GeV. We obtain y(CP) = (-2.0 +/- 1.3 +/- 0.7)%, where the first uncertainty is statistical and the second is systematic. This result is compatible with the current world average.

Place, publisher, year, edition, pages
2015. Vol. 744, 339-346 p.
Keyword [en]
BESIII, D-0-(D)over-bar(0) oscillation, y(CP), Quantum correlation
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:uu:diva-255069DOI: 10.1016/j.physletb.2015.04.008ISI: 000353892000054OAI: oai:DiVA.org:uu-255069DiVA: diva2:824709
Available from: 2015-06-22 Created: 2015-06-12 Last updated: 2017-12-04Bibliographically approved

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Johansson, TordKupsc, AndrzejSchönning, KarinWolke, Magnus

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