$B\to f_0(980)(\pi ,\text{etapp})$ Decays in the PQCD Approach

Abstract

Based on the assumption of two-quark structure of the scalar meson $f_0(980)$, we calculate the branching ratios and CP-violating asymmetries for the four $B\to f_0(980)\pi$ and $B\to f_0(980)\text{etapp}$ decays by employing the perturbative QCD (pQCD) factorization approach. The leading order pQCD predictions for branching ratios are, $Br(B^{-}\to f_0(980){\pi }^{-})\sim 2.5\times 10^{-6}$, $Br({\bar{B}}^0\to f_0(980){\pi }^0)\sim 26\times 10^{-7}$, $Br({\bar{B}}^0\to f_0(980)\eta )\sim 2.5\times 10^{-7}$ and $Br({\bar{B}}^0\to f_0(980){\eta }^{\prime })\sim 6.7\times 10^{-7}$, which are consistent with both the QCD factorization predictions and the experimental upper limits.

Comments: 13 pages, 2 ps figures, RevTex