void histCFDf8_2()
{
	gSystem->Load("../libData.so");
	TFile *f = new TFile("../data/dataDSR4/analysis_08_2.root");
	TTree *t = (TTree*)f->Get("atree");
	TCanvas *c = new TCanvas("CFD canvas");
	c->Divide(2,2);
	c->cd(1);
	t->Draw("Ach0.fTimeCFD","","");
	c->cd(2);
	t->Draw("Ach1.fTimeCFD","","");
	c->cd(3);
	t->Draw("Ach0.fTimeCFD - Ach1.fTimeCFD","","");
	c->cd(4);

}