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Fast Simulation- neutral particle [message #16126] Mon, 31 March 2014 16:24 Go to previous message
Lu Cao is currently offline  Lu Cao
Messages: 77
Registered: February 2013
continuous participant
From: *ikp.kfa-juelich.de
Hi all,

I try to do fast simulation with this decay chain: pbp->Ds+ Ds-; Ds- ->K+K-pi-; Ds+ ->e+ nv eta; eta->pi+pi-pi0 (gamma gamma). From the examples in macro/scrut, I got some problems for simulating the neutral channel:
1) in simulation macro:
  // generate electro-magnetic / hadronic split offs in the EMC? switch off when running w/o EMC
  Bool_t enableSplitoff   = kFALSE;

  //enable the producting of parametrized neutral (hadronic) split offs
  if (enableSplitoff)
    fastSim->EnableSplitoffs(BaseDir+"/fsim/splitpars.dat");

From the comments there, if I understand correctly, the "enableSplitoff" seems should be switched on for eta->pi+pi-pi0 (gamma gamma). I tried kTRUE, but it crashed.

2) in analysis:
	// *** name of the only PidAlgo TClonesArray in fsim
	TString pidalg = "PidChargedProbability";


Does it mean no neutral algorithm in fast simulation? then, how to fill the neutral list?

Thanks in advance.

Lu
 
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