# CONSTRAINED FIT INFORMATIONshow precise values?

 An overall fit to total width, partial width, 3 branching ratios uses 23 measurements and one constraint to determine 5 parameters. The overall fit has a $\chi {}^{2}$ = 20.1 for 19 degrees of freedom.

The following off-diagonal array elements are the correlation coefficients <$\mathit \delta$x$_{i}$~$\delta$x$_{j}$> $/$ ($\mathit \delta$x$_{i}\cdot{}\delta$x$_{j}$), in percent, from the fit to parameters ${{\mathit p}_{{i}}}$, including the branching fractions, $\mathit x_{i}$ =$\Gamma _{i}$ $/$ $\Gamma _{total}$. The fit constrains the ${{\mathit x}_{{i}}}$ whose labels appear in this array to sum to one.

 x2 100 x3 100 x8 100 Γ 100 x999 100 x2 x3 x8 Γ x999

 Mode Rate (MeV) Scale factor Γ2 ${{\mathit \psi}{(3770)}}$ $\rightarrow$ ${{\mathit D}^{0}}{{\overline{\mathit D}}^{0}}$ $0.52$ ${}^{+.04}_{-.05}$ 2.0 Γ3 ${{\mathit \psi}{(3770)}}$ $\rightarrow$ ${{\mathit D}^{+}}{{\mathit D}^{-}}$ $0.41$ $\pm0.04$ 2.0 Γ8 ${{\mathit \psi}{(3770)}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ ($9.6$ $\pm0.7$) $\times 10^{-6}$ 1.3