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HMPID weekly meeting. Update on Pb-Pb spectra. G. Volpe. CERN, 19 /09/2013. Updates. Monte Carlo statistics to evaluate PID efficiency has been increased. Corrected spectra evaluated in central and semi-central collisions (0 – 50 %). - PowerPoint PPT Presentation
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Update on Pb-Pb spectra
HMPID weekly meeting
CERN, 19/09/2013
G. Volpe
Updates
• Monte Carlo statistics to evaluate PID efficiency has been increased.
• Corrected spectra evaluated in central and semi-central collisions (0 – 50 %)
Spectra in Pb-Pb collisions: pions (0-50 % centr.)
Corrected spectra
PRELIMINARY
Centrality bins:0 – 5 %5 – 10 %10 – 20 %20 – 30 %30 – 40 %40 – 50 %
Spectra in Pb-Pb collisions: kaons (0-50 % centr.)
Corrected spectra
PRELIMINARY
Centrality bins:0 – 5 %5 – 10 %10 – 20 %20 – 30 %30 – 40 %40 – 50 %
Spectra in Pb-Pb collisions: kaons (0-50 % centr.)
Corrected spectra
PRELIMINARY
Centrality bins:0 – 5 %5 – 10 %10 – 20 %20 – 30 %30 – 40 %40 – 50 %
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Conclusions
• Pb-Pb corrected spectra have been evaluated in central and semi-central collisions (0-50%).
• Main corrections have been applied (tracking eff., PID eff., distance cut).
• To do: • Further increase Monte Carlo statistic for PID efficiency
evaluation. • Cross check PID efficiency from MC with that extracted from real
data (V0’s decays).• Estimate feed-down correction.
Backup
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Spctra in Pb-Pb collisions: fit exapmples
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Spectra in Pb-Pb collisions: pions raw yields
Centrality bins:0 – 5 %5 – 10 %10 – 20 %20 – 30 %30 – 40 %40 – 50 %
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Spectra in Pb-Pb: kaons raw yields
Centrality bins:0 – 5 %5 – 10 %10 – 20 %20 – 30 %30 – 40 %40 – 50 %
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Spectra in Pb-Pb collsions: protons raw yields
Centrality bins:0 – 5 %5 – 10 %10 – 20 %20 – 30 %30 – 40 %40 – 50 %
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Spectra in Pb-Pb collisions: tracking efficiency
Tracking efficiency convoluted with the detector acceptance in the required rapidity range(MC prod. : LHC12a17a_fix)
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Spectra in Pb-Pb collisions: PID efficiency (0-5 % centr.)
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Spectra in Pb-Pb collisions: PID efficiency (5-10 % centr.)
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Spectra in Pb-Pb collisions: PID efficiency
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Spectra in Pb-Pb collisions: distance cut correction
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Primary tracks multiplicity