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Determination of the D-0 -> K- pi(+) pi(0) and D-0 -> K- pi(+) pi(+) pi(-) coherence factors and average strong-phase differences using quantum-correlated measurements

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CLEO Collaboration (Including:

Lowrey, N., Mehrabyan, S., Selen, Mats A., Wiss, J., Mitchell, R. E. (Ryan Edward), Shepherd, M. R., Besson, D., Pedlar, T. K., Cronin-Hennessy, D., Gao, K. Y. et al.
). (2009) Determination of the D-0 -> K- pi(+) pi(0) and D-0 -> K- pi(+) pi(+) pi(-) coherence factors and average strong-phase differences using quantum-correlated measurements. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.80 (No.3). article no. 031105 . doi:10.1103/PhysRevD.80.031105

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Official URL: http://dx.doi.org/10.1103/PhysRevD.80.031105

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Abstract

The first measurements of the coherence factors (R-K pi pi 0 and R-K3 pi) and the average strong-phase differences((delta(K pi pi 0)(D) and delta(K3 pi)(D))) for D-0 -> K- pi(+) pi(0) and D-0 -> K- pi(+) pi(+) pi(-) are presented. These parameters can be used to improve the determination of the unitarity triangle angle gamma in B- -> DK- decays, where D is a D-0 or (D) over bar (0) meson decaying to the same final state. The measurements are made using quantum-correlated, fully reconstructed D-0(D) over bar (0) pairs produced in e(+)e(-) collisions at the psi(3770) resonance. The measured values are: R-K pi pi 0 = 0.84 +/- 0.07, delta(K pi pi 0)(D) = (227(-17)(+14))degrees, R-K3 pi = 0.33(-0.23)(+0.20), and delta(K3 pi)(D) = (114(-23)(+26))degrees. These results indicate significant coherence in the decay D-0 -> K- pi(+) pi(0), whereas lower coherence is observed in the decay D-0 -> K- pi(+) pi(+) pi(-). The analysis also results in a small improvement in the knowledge of other D-meson parameters, in particular, the strong-phase difference for D-0 -> K- pi(+), delta(K pi)(D), and the mixing parameter y.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Mesons, Coherence (Nuclear physics), CP violation (Nuclear physics)
Journal or Publication Title: Physical Review D (Particles, Fields, Gravitation and Cosmology)
Publisher: American Physical Society
ISSN: 1550-7998
Official Date: August 2009
Dates:
DateEvent
August 2009Published
Volume: Vol.80
Number: No.3
Number of Pages: 7
Page Range: article no. 031105
DOI: 10.1103/PhysRevD.80.031105
Status: Peer Reviewed
Publication Status: Published
Funder: A.P. Sloan Foundation, National Science Foundation (U.S.) (NSF), United States. Dept. of Energy, Natural Sciences and Engineering Research Council of Canada (NSERC), Science and Technology Facilities Council (Great Britain) (STFC)

Data sourced from Thomson Reuters' Web of Knowledge

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