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Jet + Gap Events

Jet + Gap Events. Tamsin Edwards University of Manchester QCD 7 th Sep 2003. Jet + Gap triggered data. Use skimmed thumbnails from Pavel Demine reconstructed with p13 whole skim is Apr 15-Jun 24 2003 (trigger lists v8-11).

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Jet + Gap Events

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  1. Jet + Gap Events Tamsin Edwards University of Manchester QCD7th Sep 2003

  2. Jet + Gap triggered data • Use skimmed thumbnails from Pavel Demine • reconstructed with p13 • whole skim is Apr 15-Jun 24 2003 (trigger lists v8-11) • This talk: part of skim, Runs 175757 - 178102 (probably not all events in these runs if skim is randomised) • Analyse jet+gap triggers: • JT_25TT_NG - 25GeV jet • JT_25TT_GAPN - 25GeV jet + North Luminosity Monitor off • JT_25TT_GAPS - 25GeV jet + South LM off • JT_35TT_GAPSN - 25GeV jet + both LM off T.Edwards QCD

  3. Event selection Made four exclusive samples from these: # events • JT_25TT_NG 7602 • that did not fire a GAP trigger 195 • - add GAP triggers that also fired fastz/ahalo/phalo 225538 • TOTAL no gap:225733 • JT_25TT_GAPN 491096 • that did not fire GAPSN trigger 396432 • that also did not fire fastz/ahalo/phalo = TOTAL GAP N: 222164 • JT_25TT_GAPS 494173 • - that did not fire GAPSN trigger 399509 • - that also did not fire fastz/ahalo/phalo = TOTAL GAP S: 348454 • JT_25TT_GAPSN 95466 • - that did not fire fastz/ahalo/phalo = TOTAL GAP SN: 95251 T.Edwards QCD

  4. Number of cone jets no gap gap south/north gap north gap south T.Edwards QCD

  5. pT of cone jets no gap gap south/north gap north gap south T.Edwards QCD

  6. Eta of cone jets no gap gap south/north gap north gap south T.Edwards QCD

  7. METC no gap gap south/north gap north gap south T.Edwards QCD

  8. METx no gap gap south/north gap north gap south T.Edwards QCD

  9. METy no gap gap south/north gap north gap south T.Edwards QCD

  10. SETC no gap gap south/north gap north gap south T.Edwards QCD

  11. Number of vertices no gap gap south/north gap north gap south T.Edwards QCD

  12. Forward energy in calorimeter • Energy sum and Multiplicity of calorimeter cells: • in EMlayers or EM+FH layers • in forward region 2.7 < |η| < 4.45 • above energy threshold: • EM E > 50MeV • FH E >100MeV T.Edwards QCD

  13. EM energy sum no gap gap south/north south north T.Edwards QCD

  14. EM+FH energy sum no gap gap south/north south north T.Edwards QCD

  15. EM energy sum gap south gap north south north T.Edwards QCD

  16. EM+FH energy sum gap south gap north south north T.Edwards QCD

  17. EM Multiplicity no gap gap south/north south north T.Edwards QCD

  18. EM Multiplicity gap south gap north south north T.Edwards QCD

  19. EM Multiplicity vs Energy sum no gap gap south/north south north T.Edwards QCD

  20. EM+FH Multiplicity vs Energy sum no gap gap south/north south north T.Edwards QCD

  21. EM Multiplicity vs Energy sum gap south gap north south north T.Edwards QCD

  22. EM+FH Multiplicity vs Energy sum gap south gap north south north T.Edwards QCD

  23. Next step • Re-run over full p13 sample: • only use JET/MET good runs • only look at JET/MET good jets • apply calorimeter gap definition to confirm LM gaps T.Edwards QCD

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