This is a simple hack to give event weights to Delphes samples made from snowmass LHE files made using BRIDGE.

Obtain this code:

git clone [email protected]:hatakeyamak/DelphesAnalysisTools.git

For compile: needs -std=c++0x flag

In your analysis code:

#include "Delphes/external/ExRootAnalysis/ExRootTreeReader.h"
#include "Delphes/classes/DelphesClasses.h"
#include "DelWeight.h"

Before event loop:

// For Delphes weights
DelWeight dw;
dw.initialize();
vector<GenParticle> GenParticlevec;

Inside event loop:

GenParticlevec.clear();
for (int i = 0; i < branchParticle->GetEntries(); ++i)
  {
    GenParticle * particle = (GenParticle*)branchParticle->At(i);
    GenParticlevec.push_back(*particle);
  }//end of loop over "particles in history"
int isample = 1; // 1: TTbar, 2: BJ, 0: All other samples
double weight = dw.weight(isample, GenParticlevec)