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Exclusive Hadronic D Decays to $eta'$ or $eta$: Addendum on Resonant Final-State Interactions | | Hai-Yang Cheng
; B. Tseng
; | | Date: |
9 Jun 2000 | | Journal: | Chin.J.Phys. 39 (2001) 28-40 | | Subject: | hep-ph | | Abstract: | For hadronic two-body decays of charmed mesons involving $eta$ or $eta’$, resonance-induced final-state interactions (FSI) that mimic the W-exchange or the W-annihilation topology can play an essential role. In particular, the decays $D^0 oar K^0eta’$ and $D^+ opi^+eta$, which are largely suppressed in the absence of FSI, are enhanced dramatically by resonant FSI. It is stressed that the effect of resonant FSI is negligible for $
ho^+(eta,eta’)$ final states because of the mismatch of the G parity of $
ho^+(eta,eta’)$ and the J=0, I=1 meson resonance. We argue that a possible gluon-mediated process in which two gluons couple directly to the gluonic component of the $eta’$, e.g. the gluonium, rather than to the flavor-singlet $eta_0$, can enhance both modes $D_s^+ o
ho^+eta’$ and $D_s^+ o
ho^+eta$, especially the former; that is, this new mechanism can account for the unexpectedly large branching ratio of $
ho^+eta’$ without suppressing $
ho^+eta$. | | Source: | arXiv, hep-ph/0006081 | | Services: | Forum | Review | PDF | Favorites | |
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