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26 April 2024 |
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Article overview
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Non-factorization contributions in $D
ightarrow pi K, KK$ decay | | Xiang-Yao Wu
; Bai-Jun Zhang
; Hai-Bo Li
; Xiao-Jing Liu
; Bing Liu
; Jing-Wu Li
; Yi-Qing Guo
; | | Date: |
1 Apr 2011 | | Abstract: | We have analyzed the $D
ightarrow pi K, KK$ decay with the naive
factorization (NF), QCD factorization (QCDF)and QCD factorization including
soft-gluon exchanges (QCDF+SGE). In these decay channels, the soft-gluon
effects are firstly calculated with light cone QCD sum rules. Comparing the
three kind approaches, we can find the calculation results have made much more
improved QCD factorization (QCDF) than the naive factorization (NF), and the
calculation results have also made improved QCD factorization including
soft-gluon exchanges (QCDF+SGE) than the QCD factorization (QCDF) in the
color-suppressed decay channels. In addition, we find the soft-gluon effects
are larger than the leading order contributions, and the calculation results
are close to the experimental data for the color-suppressed decay channels. In
color-allowed decay channel $D^{0}
ightarrow pi^{+} K^{-}$, the soft-gluon
effects are small and we should consider other power terms, such as final state
interaction and annihilation effects. | | Source: | arXiv, 1104.0135 | | Services: | Forum | Review | PDF | Favorites | |
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