Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-07-20
Phys.Rev.D75:014018,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
27 pages, 6 ps/eps figures, more discussions about theoretical uncertainties, final version to appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.75.014018
We calculate the CP averaged branching ratios and CP-violating asymmetries for $B^0 \to \eta \eta, \eta \eta^\prime$ and $\eta^\prime \eta^\prime$ decays by employing the perturbative QCD (pQCD) factorization approach. The pQCD predictions for the CP-averaged branching ratios are $Br(B^0 \to \eta \eta) \approx 0.67 \times 10^{-7}$, $Br(B^0 \to \eta \eta^\prime) \approx 0.18 \times 10^{-7}$, and $Br(B^0 \to \eta^{\prime} \eta^{\prime}) \approx 0.11 \times 10^{-7}$, which are consistent with currently available experimental upper limits. We also predict large CP-violating asymmetries for the considered three decay modes, which can be tested by the future B meson experiments.
Chen Xin-fen
Guo Dong-qin
Xiao Zhen-Jun
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