}
else{
Float_t radi = fZsig/(num-1)-fZFound*fZFound/num/(num-1);
// radi = square root of sample variance of Z
if(radi>0.)fZsig=TMath::Sqrt(radi);
}
else{
Float_t radi = fZsig/(num-1)-fZFound*fZFound/num/(num-1);
// radi = square root of sample variance of Z
if(radi>0.)fZsig=TMath::Sqrt(radi);
fCurrentVertex = new AliESDVertex(fZFound,fZsig,num);
fCurrentVertex->SetTitle("vertexer: B");
ResetHistograms();
fCurrentVertex = new AliESDVertex(fZFound,fZsig,num);
fCurrentVertex->SetTitle("vertexer: B");
ResetHistograms();