Final-state interaction and B→KK decays in perturbative QCD

Chuan Hung Chen, Hsiang Nan Li

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70 Citations (Scopus)


We predict the branching ratios and CP asymmetries of the B→KK decays using the perturbative QCD factorization theorem, in which tree, penguin, and annihilation contributions, including both factorizable and nonfactorizable ones, are expressed as convolutions of hard six-quark amplitudes with universal meson wave functions. The unitarity angle φ3=90° and the B and K meson wave functions extracted from experimental data of the B→Kπ and ππ decays are employed. Since the B→KK decays are sensitive to final-state interaction effects, the comparision of our predictions with future data can test the neglect of these effects in the above formalism. The CP asymmetry in the B±→K±K0 modes and the Bd0→K±K± branching ratios depend on annihilation and nonfactorizable amplitudes. The B→KK data can also verify the evaluation of these contributions.

Original languageEnglish
Article number014003
JournalPhysical Review D
Issue number1
Publication statusPublished - 2001

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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