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U-spin symmetry in doubly Cabibbo-suppressed charmed meson decays |
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| Authors: | Michael Gronau Jonathan L. Rosner |
| Affiliation: | a Department of Physics, Technion — Israel Institute of Technology, Technion City, 32000 Haifa, Israel b Enrico Fermi Institute and Department of Physics, University of Chicago, Chicago, IL 60637, USA |
| Abstract: | We prove a U-spin amplitude triangle relation among doubly Cabibbo-suppressed (DCS) charmed meson decays, D0→K+π−,D0→K0π0 and D+s→K0K+, congruent to an isospin relation among corresponding Cabibbo-favored (CF) decays. U-spin breaking in relative phases between CF and DCS amplitudes affects time-dependent studies of D0– mixing. Comparison of final state phase patterns in DCS and CF amplitude triangles, which can shed some light on these phases, is carried out in a phenomenological framework incorporating resonance contributions. |
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