Branching Ratio and CP Asymmetry of $B^0\to {\eta }^{(\prime )}{\eta }^{(\prime )}$ Decays in the Perturbative QCD Approach

Abstract

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.

27 pages, 6 ps/eps figures, more discussions about theoretical uncertainties, final version to appear in Phys. Rev. D

References in corpus (1)

• Gluonic contribution to $B\to {\eta }^{(\prime )}$ form factors

Cited by in corpus (12)

• Updating B --> PP, VP decays in the framework of flavor symmetry
• Composition of the Pseudoscalar Eta and Eta' Mesons
• Branching ratios and CP asymmetries of $B\to K{\eta }^{(\prime )}$ decays in the pQCD approach
• Charmless two-body $B$ meson decays in perturbative QCD factorization approach
• Hochschild homology, trace map and $\zeta$-cycles
• $B^0\to \omega {\eta }^{(\prime )}$ and $\varphi {\eta }^{(\prime )}$ decays in the perturbative QCD approach
• Branching Ratio and CP Asymmetry of $B_s\to {\pi }^0{\eta }^{(\prime )}$ Decays in the perturbative QCD Approach
• The PQCD approach towards to next-to-leading order: a short review
• Direct $CP$ violation of three bodies decay process from the resonance effect
• $B_{d,s}^0\to f_1{f}_1$ decays with $f_1(1285)-f_1(1420)$ mixing in the perturbative QCD approach
• Charmless hadronic $B\to (f_1(1285),f_1(1420))P$ decays in the perturbative QCD approach
• Study of B^{0}_{s} \rightarrow \ TT(a_{2}(1320),K^{*}_{2}(1430),f_{2}(1270),f^{'}_{2}(1525)) in the perturbative QCD approach