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ITTF Tracking Efficiency

ITTF Tracking Efficiency. 200GeV AuAu central, Minbias data run321,274. Lots of help from ITTF code developers and J. Lauret. Outline . Selection of track (cuts) in analysis Comparison between ITTF and TPT tracks Multiplicity (centrality cuts) Nftpnts distribution Global dca distribution

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ITTF Tracking Efficiency

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  1. ITTF Tracking Efficiency 200GeV AuAu central, Minbias datarun321,274 Lots of help from ITTF code developers and J. Lauret Zhangbu Xu (BNL)

  2. Outline • Selection of track (cuts) in analysis • Comparison between ITTF and TPT tracks • Multiplicity (centrality cuts) • Nftpnts distribution • Global dca distribution • Efficiency vspT, eta, centrality Zhangbu Xu (BNL)

  3. CUTS • Centrality (Nch):|eta|<0.5,|z|<25cm, nFtPnts>=10, primary • pT Spectra:|eta|<0.5,|z|<25cm, nFtPnts>15, primary • dEdx bands:|eta|<0.5,|z|<25cm, nFtPnts>=25 Zhangbu Xu (BNL)

  4. Multiplicity Overall Efficiency: ITTF/TPT=85% Centrality definition Is different between ITTF and TPT Using CTB multiplicity CTB/50Nch Zhangbu Xu (BNL)

  5. Global DCA ITTF>TPT Zhangbu Xu (BNL)

  6. FitPoints Distribution Inefficiency at low nftpnts low pT central minbias Zhangbu Xu (BNL)

  7. dEdx Clear dEdx bandswork in progress Zhangbu Xu (BNL)

  8. Efficiency vs pT Central midcentral Zhangbu Xu (BNL)

  9. HIJING Pion Efficiency Zhangbu Xu (BNL)

  10. Efficiency vs eta Flat for |eta|<0.75 Decrease faster than TPT Zhangbu Xu (BNL)

  11. Conclusions • ITTF performs well! • 97%104% (ITTF/TPT) with pT>0.5GeV/c|eta|<0.75 • Things to be tuned: • Low pT Efficiency • High eta Efficiency • dEdx • Track Quality Definition (chi2, dca?) Zhangbu Xu (BNL)

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