Difference: 02012012 (17 vs. 18)

Revision 182012-02-03 - Ssakai

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META TOPICPARENT name="Analysis"
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      • the V0 efficiency from data (c-t matching) shows a dependence as for inclusive track-matching (any particle - so in electron jargon : hadron contaminated) - somewhat below 0.8
      • whereas the efficiency from MC shows values typical for purified electron candidates - above 0.8
    • The above observation points to MC efficiency is to be used, however, of course the efficiency for V0s in MC will be investigated and compared to data - to be done right away. Also the closer investigation of at the E/p within the V0 sample in data will be made - this would be a good consistency check for the contamination of the electron sample in V0 selections.
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      • However, the E/p in V0 indicates the sample is very clean
 
  • The resulting x-section is shown.
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    • calculated for MC driven efficiency and V0 driven efficiency which are consistent within the systematic uncertainties. The resolution to the question of the residuals should indicate which of the curves are to be used as THE result.
    • stable in 20 % uncertainty in inclusive electron level. Large discrepancy at low pT due to the large HFE contribution
 

Hadron contamination & electron yields from E/p distribution

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  HFE spectrum (corrected with 10f6a MB MC)
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Pic_eop_fit_expgau_v2.png"
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Pic_eop_fit_expgau_v2.png"
 

Further checks (Done)

 
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