$\text{etap}K$ puzzle of B meson decays and new physics effects in the TC2 model

Abstract

Using the low energy effective Hamiltonian with the generalized factorization, we calculate the new physics contributions to $B\to {\pi }^{+}{\pi }^{-},K\pi$ and $K\text{etap}$ in the Topcolor-assisted-Technicolor(TC2) model, and compare the results with the available data. By using $F_0^{\mathrm{B}\pi }(0)=0.20\pm 0.04$ preferred by the CLEO data of $B\to {\pi }^{+}{\pi }^{-}$ decay, we find that the new physics enhancements to $B\to K\text{etap}$ decays are significant in size, $\sim 50$ with respect to the standard model predictions, insensitive to the variations of input parameters and hence provide a simple and plausible new physics interpretation for the observed unexpectedly large $B\to K\text{etap}$ decay rates.

Comments: Latex file, 16 pages with 2 eps figures. Accepted for publication in Mod.Phys.Lett. A