Study of semi-inclusive production of eta' mesons in B decays
Abstract
We report a measurement of the rate for B \to \eta' X_s transitions where the \eta' meson has center-of-mass momentum in the range 2.0 to 2.7\gevc and X_s represents a system comprising a kaon and up to four pions. Our study is based on 22.2 million B\bar{B} pairs collected at the \Upsilon(4S) with the BABAR detector at the Stanford Linear Accelerator Center. We find \mathcal{B}(B \to \eta' X_s)=(6.8^{+0.7}_{-1.7}(stat)\pm1.0(syst)^{+0.0}_{-0.5}(bkg))\times10^{-4} assuming that the signal is due to b \to sg^* transitions.