float GetWeightFLminusFR(float x,float var,LorentzVector p4W, bool Wplus ){
// variable x is cos(theta) here
// TH1F* h_polarization_Wplus[4][3];
// TH1F* h_polarization_Wminus[4][3];
float pt_bins[5] = {50,100,300,500,10000};
float eta_bins[4] = {0,1,2,5};
// TString bin_names_pt[4] = {"pt_50_100_","pt_100_300_","pt_300_500_","pt_500_up_"};
// TString bin_names_eta[3] = {"eta_0_1","eta_1_2","eta_2_5"};
float fl_plus = 0;
float fr_plus = 0;
float f0_plus = 0;
float fl_minus = 0;
float fr_minus = 0;
float f0_minus = 0;
if ( H_polarization_Wplus[0]==0 || H_polarization_Wminus[0]==0 )
LoadPolarizationHistograms();
for(int i=0;i<4;i++){
for(int ii=0;ii<3;ii++){
if(p4W.Pt()>pt_bins[i]&&p4W.Pt()<pt_bins[i+1]&&fabs(p4W.Rapidity())>eta_bins[ii]&&fabs(p4W.Rapidity())<eta_bins[ii+1]){
if(i==3&&ii==2){
//in highest rapidity and highest ptW bin do nothing because the statistics is lousy
}
else{
if(Wplus){
fl_plus = H_polarization_Wplus[0]->GetBinContent(i,ii);
fr_plus = H_polarization_Wplus[1]->GetBinContent(i,ii);
// f0_plus = H_polarization_Wplus[2]->GetBinContent(i,ii);
f0_plus = 1-fl_plus-fr_plus;
}//end of Wplus
if(!Wplus){
fl_minus = H_polarization_Wminus[0]->GetBinContent(i,ii);
fr_minus = H_polarization_Wminus[1]->GetBinContent(i,ii);
// f0_minus = H_polarization_Wminus[2]->GetBinContent(i,ii);
f0_minus = 1-fl_minus-fr_minus;
}//end of Wminus
}//end of requiring that last bin in helicity not be used
}//end of if statement for W pt and helicity
}}//end of for loop
float f0=0;
float fl=0;
float fr=0;
float fl_variation = 0;
float fr_variation = 0;
float original_value = 0;
float new_value = 0;
if(Wplus){f0=f0_plus;fl=fl_plus;fr=fr_plus;
fl_variation = fl+(fl-fr)*var*0.01;
fr_variation = fr-(fl-fr)*var*0.01;
if(fl_variation>1||fr_variation<0){fl_variation=1-f0;fr_variation=0;}
/*
cout<<"W plus event"<<endl;
cout<<"W pt: "<<p4W.Pt()<<endl;
cout<<"W y: "<<fabs(p4W.Rapidity())<<endl;
cout<<"fl original: "<<fl<<", fl vary: "<<fl_variation<<endl;
cout<<"fr original: "<<fr<<", fr vary: "<<fr_variation<<endl;
cout<<"fo original: "<<f0<<endl;
*/
original_value = f0*(1-x*x)+0.5*fl*(1-x)*(1-x)+0.5*fr*(1+x)*(1+x);
new_value = f0*(1-x*x)+0.5*fl_variation*(1-x)*(1-x)+0.5*fr_variation*(1+x)*(1+x);
}
if(!Wplus){f0=f0_minus;fl=fl_minus;fr=fr_minus;
fl_variation = fl+(fl-fr)*var*0.01;
fr_variation = fr-(fl-fr)*var*0.01;
if(fl_variation>1||fr_variation<0){fl_variation=1-f0;fr_variation=0;}
/*
cout<<"W minus event"<<endl;
cout<<"W pt: "<<p4W.Pt()<<endl;
cout<<"W y: "<<fabs(p4W.Rapidity())<<endl;
cout<<"fl original: "<<fl<<", fl vary: "<<fl_variation<<endl;
cout<<"fr original: "<<fr<<", fr vary: "<<fr_variation<<endl;
cout<<"fo original: "<<f0<<endl;
*/
original_value = f0*(1-x*x)+0.5*fr*(1-x)*(1-x)+0.5*fl*(1+x)*(1+x);
new_value = f0*(1-x*x)+0.5*fr_variation*(1-x)*(1-x)+0.5*fl_variation*(1+x)*(1+x);
}
float w = 1;
// cout<<"original_value: "<<original_value<<endl;
// cout<<"new_value: "<<new_value<<endl;
if((f0+fl+fr)!=0){
if(original_value!=0){
w = new_value/original_value; }
else{cout<< "ERROR"<< endl; exit(1);}
}
// cout<<"Weight is: "<<w<<endl;
return w;
}
