Measurements of Absolute Hadronic Branching Fractions of D Mesons

TL;DR

This paper reports precise measurements of the absolute hadronic branching fractions of D mesons using e+e- collision data at the psi(3770) resonance, providing key reference values for charm physics.

Contribution

It presents the first precise absolute measurements of D meson branching fractions and cross sections at the psi(3770) resonance, improving the accuracy of charm decay data.

Findings

Measured B(D0 -> K-pi+) = (3.91 ± 0.08 ± 0.09)%

Measured B(D+ -> K-pi+pi+) = (9.5 ± 0.2 ± 0.3)%

Determined e+e- -> DDbar cross sections

Abstract

Using e+e- collisions recorded at the psi(3770) resonance with the CLEO-c detector at the Cornell Electron Storage Ring, we determine absolute hadronic branching fractions of charged and neutral D mesons. Among measurements for both Cabibbo-favored and Cabibbo-suppressed modes, we obtain reference branching fractions B(D0 -> K-pi+)=(3.91 +- 0.08 +- 0.09)% and B(D+ -> K-pi+pi+)=(9.5 +- 0.2 +- 0.3)%, where the uncertainties are statistical and systematic, respectively. Using a determination of the integrated luminosity, we also extract the e+e- -> DDbar cross sections.