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Can we get asymmetry in Re{A11} from GenBod?

Updated on Mon, 2007-11-26 01:03. Originally created by chajecki on 2007-11-21 15:18.

The goal of this study: 

Asymmetry in Re{A11}

PYTHIA

In unlike-sign pion correlations from pythia we see an asymmetry in Al=1,m components.

  • p+p : asymmetry in Re{A11} - because of different pT distribution (average pT) for positive and negative pions
  • p+pbar : asymmetry in Re{A10} - because asymmetry in rapidity

See Figure below

 

GenBod

So we should see similar asymmetry in results from GenBod if we consider e.g. pion-proton system where both particle species should have different pT distribution

 LCMS Frame

Lab Frame

PR Frame

GenBod : Observations of asymmetry in Re{A11}

  • LCMS Frame
    • no asymmetry in GCF (GenBod correlation function)
    • asymmetry in EMCICs
  • Lab Frame
    • small asymmetry in GCF
    • asymmetry in EMCICs but different sign than asymmetry in GCF
  • PR Frame
    • asymmetry in both GCF and EMCICs
      - small discrepancy probably because EMCICs formula is not pefect
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