void ana_etac_task_batch(TString prefix="test", int nevts=0, double pbarmom = 6.232069, int decayMode = 0, int recoilMode = 0, int dataMode=0, TString pidQuality = "All")
{
	InFile=prefix+"_fast.root";
	TString OutFile = prefix+ "_" + pidQuality + TString::Format("_d%dr%d_m%d", decayMode, recoilMode, dataMode) + "_taskana.root"; // cut away input path

	// *** initialization
	FairLogger::GetLogger()->SetLogToFile(kFALSE);

	FairRunAna* fRun = new FairRunAna();
	fRun->SetWriteRunInfoFile(kFALSE);
	fRun->SetInputFile(InFile);
	fRun->SetOutputFile(prefix+"_dummy.root");

	// *** take constant field; needed for PocaVtx
	RhoCalculationTools::ForceConstantBz(20.0);

	// *** HERE OUR ANALYSIS TASK GOES!
	PndScrutJpsiEtacTask *scrutTask = new PndScrutJpsiEtacTask(pbarmom, OutFile, decayMode, recoilMode, dataMode, pidQuality);
	fRun->AddTask(scrutTask);

	// *** and run analysis
	fRun->Init();
	fRun->Run(0,nevts);
}