“…The published CDF [12] and D0 [13,14] where Run 1a refers to the 1992 -93 data and Run 1b refers to the 1994 -95 data. The uncertainties are summarized in Table VII. We combine the D0 results from Run 1a and Run 1b taking the systematics due to choice of PDF (0.3%), the uncertainty in M W (0.1%), the uncertainty in the boson p T spectrum (0.1%), clustering algorithm dependence (0.2%), physics generator issues (0.3%), electroweak radiative corrections (1.0%) [19], and Drell-Yan background (0.1%), as correlated error components, to obtain a total correlated uncertainty of 1.1%.…”