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HBD Run-9 data analysis

This reminder provides important information on data selection criteria, electron identification, and improvements for HBD Run 9 data analysis. Includes details on vertex cuts, DC quality cuts, matching cuts, RICH and EMC criteria. Changes in equilibration and its impact on clusters efficiency are highlighted.

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HBD Run-9 data analysis

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  1. HBD Run-9 data analysis I. Ravinovich WIS I. Ravinovich

  2. Data selection and electron ID:quick reminder • CNT files, 18 runs • Vertex cut: +/- 20 cm. • 142.6M MB events before vertex cut, 88.4M events after +/- 20 cm cut. • DC quality cut: 31 or 63. • 3s matching cuts on DF and DZ to EMC. • RICH: n0>0 • EMC: 0.6 < E/p < 1.0 for PbGl 0.2 < E/p < 0.6 for PbSc • Todd produced one run with new libraries ana.129, the suspicion is that E. Kistenev made some changes. I. Ravinovich

  3. Pad to pad equilibration: two extremes from DB have shown below. The average RMS/Mean over all 19 modules w/o equilibration is 14.7%, w/ from DB is 13.7%, a new equilibration gives 4.5%. I. Ravinovich

  4. Resolved single clusters w/ equilibration from DB and w/ a new one. Note that it is strongly affected the efficiency by almost a factor of 2. I. Ravinovich

  5. Unresolved double clusters w/ equilibration from DB and w/ a new one. The efficiency have been increased by ~50%. I. Ravinovich

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