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Rescattering-induced D→SS\\documentclass12pt{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$D\\rightarrow SS$$\\end{document} weak decays
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Rescattering-induced D→SS\\documentclass12pt{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$D\\rightarrow SS$$\\end{document} weak decays
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Rescattering-induced D→SS\\documentclass12pt{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$D\\rightarrow SS$$\\end{document} weak decays
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Journal Article
Rescattering-induced D→SS\\documentclass12pt{minimal} \\usepackage{amsmath} \\usepackage{wasysym} \\usepackage{amsfonts} \\usepackage{amssymb} \\usepackage{amsbsy} \\usepackage{mathrsfs} \\usepackage{upgreek} \\setlength{\\oddsidemargin}{-69pt} \\begin{document}$$D\\rightarrow SS$$\\end{document} weak decays
2026
Overview
We investigate two-body non-leptonic D→SS weak decays, where S denotes a light scalar meson such as a0/a0(980), f0/f0(980), or σ0/f0(500). Short-distance topologies from W-boson emission and annihilation (exchange) are found to be negligible, while long-distance final-state interactions provide the dominant contributions. In particular, triangle rescattering processes, D→πη(′)→σ0a0 and D→a1(1260)η→σ0a0, mediated by pion exchange in πη(′) and a1(1260)η scatterings, respectively, are identified as the leading mechanisms. Our calculations yield branching fractions B(Ds+→σ0a0+)=(1.0±0.2-0.2+0.1)×10-2, B(D+→σ0a0+)=(1.1±0.2-0.2+0.1)×10-3, and B(D0→σ0a00)=(0.9±0.2-0.3+0.2)×10-5. For the Cabibbo-allowed decay mode Ds+→f0a0+, the near-threshold condition mDs≃mf0+ma0 limits the phase space, suppressing the branching fraction to (3.4±0.3-0.9+0.4)×10-4. These results highlight rescattering-induced D→SS decays as promising channels for experimental studies at BESIII, Belle(-II), and LHCb.
