Observation of High Momentum $η'$ Production in B Decay

Details Observation of High Momentum $η'$ Production in B Decay Observation of High Momentum $η'$ Production in B Decay

1998-04-30

arxiv.org/abs/hep-ex/9804018v1

Phys.Rev.Lett.81:1786-1790,1998

Physics

High Energy Physics

High Energy Physics - Experiment

14 pages, 4 Postscript figures, postscript file also available through http://w4.lns.cornell.edu/public/CLNS. Submitted to Phy

Scientific paper

10.1103/PhysRevLett.81.1786

We report the first observation of $B\to \eta' X$ transitions with high momentum $\eta'$ mesons. We observe $39.0\pm 11.6$ B decay events with $2.0< p_{\eta'} < 2.7$ GeV/c, the high momentum region where background from $b\to c$ processes is suppressed. We discuss the physical interpretation of the signal, including the possibility that it is due to $b\to s g^*$ transitions. Given that interpretation, we find ${\cal B}(B\to \eta' X_s) = (6.2 \pm 1.6(stat) \pm 1.3(sys)^{+0.0}_{-1.5}(bkg))\times 10^{-4} $ for $2.0

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