Measurement of absolute hadronic branching fractions of D0 and D+ and σ(e+e− → DD̄) at Ecm = 3.77 GeV

Abstract

Using 57.2 pb−1 of data collected with the CLEO-c detector at the ψ(3770) resonance, we measure absolute branching fractions for three D0 and two D+ Cabibbo-allowed hadronic decay modes, and the cross section for e+e− → D D̄ at Ecm = 3.77 GeV. We report preliminary measurements of branching fractions ℬ(D0 → K−π+) = (3.92 ± 0.08 ± 0.23)%, ℬ(D0 → K−π+π0) = (14.3 ± 0.3 ± 1.0)%, ℬ(D0 → K−π+π+π−) = (8.1 ± 0.2 ± 0.9)%, ℬ(D+ → K−π+π+) = (9.8 ± 0.4 ± 0.8)%, and ℬ(D+ → KS0π+) = (1.61 ± 0.08 ± 0.15)%. and the cross sections σ(e+e− → DD̄) = (6.06 ± 0.13 ± 0.22) nb.