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Model-independent determination of the strong-phase difference between D(0) and (D)over-bar(0) -> KS,L(0)h(+)h(-) (h = pi, K) and its impact on the measurement of the CKM angle gamma/phi(3)

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Libby, J., Kornicer, M., Mitchell, R., Shepherd, M., Tarbert, C., Besson, D., Pedlar, T., Xavier, J., Cronin-Hennessy, D., Hietala, J. et al.
. (2010) Model-independent determination of the strong-phase difference between D(0) and (D)over-bar(0) -> KS,L(0)h(+)h(-) (h = pi, K) and its impact on the measurement of the CKM angle gamma/phi(3). Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.82 (No.11). 112006 . ISSN 1550-7998

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Abstract

We report the first determination of the relative strong-phase difference between D0→KS,L0K+K- and D̅ 0→KS,L0K+K-. In addition, we present updated measurements of the relative strong-phase difference between D0→KS,L0π+π- and D̅ 0→KS,L0π+π-. Both measurements exploit the quantum coherence between a pair of D0 and D̅ 0 mesons produced from ψ(3770) decays. The strong-phase differences measured are important for determining the Cabibbo-Kobayashi-Maskawa angle γ/ϕ3 in B-→K-D˜0 decays, where D˜0 is a D0 or D̅ 0 meson decaying to KS0h+h- (h=π, K), in a manner independent of the model assumed to describe the D0→KS0h+h- decay. Using our results, the uncertainty in γ/ϕ3 due to the error on the strong-phase difference is expected to be between 1.7° and 3.9° for an analysis using B-→K-D˜0, D˜0→KS0π+π- decays, and between 3.2° and 3.9° for an analysis based on B-→K-D˜0, D˜0→KS0K+K- decays. A measurement is also presented of the CP-odd fraction, F-, of the decay D0→KS0K+K- in the region of the ϕ→K+K- resonance. We find that in a region within 0.01  GeV2/c4 of the nominal ϕ mass squared F->0.91 at the 90% confidence level.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Journal or Publication Title: Physical Review D (Particles, Fields, Gravitation and Cosmology)
Publisher: American Physical Society
ISSN: 1550-7998
Official Date: 22 December 2010
Volume: Vol.82
Number: No.11
Number of Pages: 30
Page Range: 112006
Identification Number: 10.1103/PhysRevD.82.112006
Status: Peer Reviewed
Publication Status: Published
Funder: National Science Foundation , U.S. Department of Energy , Natural Sciences and Engineering Research Council of Canada, U.K. Science and Technology Facilities Council
URI: http://wrap.warwick.ac.uk/id/eprint/40172

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