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Charmed meson decays to two pseudoscalars

by: Bhubanjyoti Bhattacharya, Jonathan L. Rosner
Physical Review D, Vol. 81, No. 1. (14 Nov 2009), doi:10.1103/physrevd.81.014026  Key: citeulike:11924249

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Abstract

A recent update of data on the decays of $D^0$, $D^+$, and $D_s^+$ to pairs of light pseudoscalars calls for a renewed analysis of key decay amplitudes and tests of flavor symmetry. The present data change our previous understanding of relative phases between amplitudes that describe Cabibbo-favored decays of the charmed mesons. The new data also seem to favor a smaller octet-singlet mixing angle for the $η$ and $η'$ mesons when singly-Cabibbo-suppressed processes are taken into account. We also discuss the effects of the new data on interference between Cabibbo-favored and doubly-Cabibbo-suppressed decays.


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