HMPID plenary meeting. HMPID offline and analysis status report. G . Volpe. CERN, 22 /03/2013. HMPID offline update. Correction factor for the Cherenkov angle resolution implemented and committed to the trunk.
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HMPID offline and analysis status report
Nfreon = f(Temp,Ephoton)
Radiator vessel 1
Radiator vessel 2
Radiator vessel 3
Cherenkov signal vs momentum for pions, kaons and protons selected using n-sigmas cut, calculated with the new code. The plot refer to ≈ 300000 p-p 7 TeV events.
Important: HMPID analysis should migrate on AODs, in this way will be much faster!!
Number of reconstructed photo-electros vs sin2(qckov) in data and Monte Carlo
Rapidity distribution for protons in HMPID acceptance. Comparison data Monte Carlo. In data protons have been selected using track-by-track HMPID PID (real acceptance).
pbar/p ratio in Pb-Pb collisions provided by means of statistical unfolding in HMPID corrected for tracking efficiencies.
pbar/p ration in pPb collisions provided by means of statistical unfolding in TOF. Small decreasing is present, very likely due to wrong efficiencies corrections.
TOF ratio evaluated using n-sigma method. 2 sigmas cut has been applied
Tracking efficiency convoluted with HMPID acceptance for two different anchor MC productions. No difference between protons and anti-protons, also a low momenta?!
PID efficiency for protons and anti-protons, extracted by means of V0s selection. Difference between the two charge is present.
Correction factor due to distance track-MIP cut, for negative and positive tracks.
pbar/p ratio corrected for PID efficiency and cut distance correction factor
Total negative/total positive tracks in HMPID acceptance
Position of TPC membrane