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

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

2001-03-14

arxiv.org/abs/hep-ph/0103152v1

Mod.Phys.Lett. A16 (2001) 441-456

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1142/S0217732301003115

Using the low energy effective Hamiltonian with the generalized factorization, we calculate the new physics contributions to $B \to \pi^+ \pi^-, K \pi$ and $K \etap$ in the Topcolor-assisted-Technicolor(TC2) model, and compare the results with the available data. By using $F_0^{{\rm B\pi}}(0)=0.20\pm 0.04$ preferred by the CLEO data of $B \to \pi^+ \pi^-$ decay, we find that the new physics enhancements to $B \to K \etap$ 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 $B\to K \etap$ decay rates.

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