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Measurement of yCP in D0–D¯0 oscillation using quantum correlations in e+e−→D0D¯0 at s=3.773 GeV
- Source :
- Physics Letters B, Vol 744, Iss , Pp 339-346 (2015)
- Publication Year :
- 2015
- Publisher :
- Elsevier, 2015.
-
Abstract
- We report a measurement of the parameter yCP in D0–D¯0 oscillations performed by taking advantage of quantum coherence between pairs of D0D¯0 mesons produced in e+e− annihilations near threshold. In this work, doubly-tagged D0D¯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 s=3.773 GeV. We obtain yCP=(−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. Keywords: BESIII, D0–D¯0 oscillation, yCP, Quantum correlation
Details
- Language :
- English
- ISSN :
- 03702693
- Volume :
- 744
- Issue :
- 339-346
- Database :
- Directory of Open Access Journals
- Journal :
- Physics Letters B
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.0c0db433e9b04b4496c20375adcfba52
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.physletb.2015.04.008