Measurement of the e+e- -> B0sB0sX cross section in the energy range from 10.63 to 11.02 GeV using inclusive D+s and D0 production
2023
Abstrakt
We report the first measurement of the inclusive e+e- ! b-b ! D+- s X and e+e- ! b-b ! D0/-D0 X cross sections in the energy range from 10.63 to 11.02 GeV. Based on these results, we determine (e+e- ! B0 s
-B 0 s X) and (e+e- ! B-B X) in the same energy range. We measure the fraction of B0 s events at (10860) to be fs = (22.0+2.0
-2.1)%. We determine also the ratio of the B0 s inclusive branching fractions B(B0 s ! D0/-D 0 X)/B(B0 s !
D+- s X) = 0.416+-0.018+-0.092. The results are obtained using the data collected with the
Belle detector at the KEKB asymmetric-energy e+e- collider.