Precision electroweak experiments and heavy physics: An update

We update our previous global analysis of weak neutral current and Z and W data in which the parameters h_V and h_A associated with new heavy physics were constrained, by incorporating recent results on Z properties and M_W. We obtain -0.93<h_V<0.33, -1.9<h_AZ<0.27, and -2.5<h_AW<1.5 at 90% C.L., considerably better than the previous limits.