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New determination of the D0→K -π +π0 and D0→K -π +π +π - coherence factors and average strong-phase d

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Libby, J. (James), Malde, Sneha, Powell, A. (Andrew), Wilkinson, G. (Guy), Asner, D. M., Bonvicini, G., Briere, R. A. (Roy A.), Gershon, T. J., Naik, P. (Paras), Pedlar, T. K., Rademacker, Jonas, Ricciardi, S. and Thomas, C. (Christopher) (2014) New determination of the D0→K -π +π0 and D0→K -π +π +π - coherence factors and average strong-phase d. Physics Letters B, Volume 731 . pp. 197-203. doi:10.1016/j.physletb.2014.02.032

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Official URL: http://dx.doi.org/10.1016/j.physletb.2014.02.032

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Abstract

Measurements of the coherence factors (RKππ0 and R K3π) and the average strong-phase differences (δDKππ0 and δDK3π) for the decays D0→K -π +π0 and D0→K -π +π +π - are presented. These parameters are important inputs to the determination of the unitarity triangle angle γ in B ∓→DK ∓ decays, where D designates a D0 or D-0 meson decaying to a common final state. The measurements are made using quantum correlated DD- decays collected by the CLEO-c experiment at the ψ(3770) resonance, and augment a previously published analysis by the inclusion of new events in which the signal decay is tagged by the mode D→KS0π+π- The measurements also benefit from improved knowledge of external inputs, namely the D0D-0 mixing parameters, rDKπ and several D-meson branching fractions. The measured values are RKππ0=0.82±0.07, δDKππ0=(164-14+20)°, RK3π=0.32-0.28+0.20 and δDK3π=(225-78+21)°. Consideration is given to how these measurements can be improved further by using the larger quantum-correlated data set collected by BESIII.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): CP violation (Nuclear physics), Particles (Nuclear physics) -- Charm
Journal or Publication Title: Physics Letters B
Publisher: Elsevier Science BV
ISSN: 0370-2693
Official Date: 4 April 2014
Dates:
DateEvent
4 April 2014Published
20 February 2014Available
14 February 2014Accepted
9 January 2014Submitted
Volume: Volume 731
Page Range: pp. 197-203
DOI: 10.1016/j.physletb.2014.02.032
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Science and Technology Facilities Council (Great Britain) (STFC)

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