Study the pile-up simulation for 2022 CMS proton-proton collisions dataMaedeh Khalifeh, Hamed Bakhshian 30 April 2024Approach:detailsSimulationDataZeroBias MINIAOD Run2022 PromptReco (B to G eras)The Era B of data is selected as representative ​​ This data have 7 erasEra B contains 51 runs ​​ It's luminosity is between 10^-3 and 24 (nb.s)^-1in simulationProbability(14.167 , 15.347)(16.477 , 17.733)(15.347 , 16.477)(17.733 , 23.811)Mixing data andData distributionsProbability - g(l)dl= 40 (1/nb 1/s)Number of Events(16.477 , 17.733)(17.733 , 23.811)(14.167 , 15.347)(15.347 , 16.477) (15.347 , 16.477) LuminosityVariableswe chose LumiBin 4 and will show that in detail:0.001 < luminosity (1/nb 1/s) < 23.811 ​​First LumiBin0.210.180.150.120.090.060.03First lumibin contains 7% of luminosity probability Remaining 93% divided into 5 equal-sized lumibins.Era BCompare distributionsCross section1. SingleNeutrino_E-10-gun 2. Run3 Winter22 MiniAOD 3. Flat pile up distribution is in range of 0 to 99 Era BReliability:Selected VariablesnVertices​nGoodVertices​nChargedHadrons​fixedGridRhoFastjetCentral​Post fit: Data Vs. PredictionWeighted Fit QualityPull plot for nVerticesAverage of fit quality for each VariableExtracted cross section for era BThe error bar represents variancePullResults:73.64 ± 3.5 (mb)Proposedcross section​Run 2Run 3 Cross section(mb)Anomalies:Except these 8 variables we've studied + 7 variables but all of them were put aside because of reasons:​nNeutralHadrons fit quality​Variables with good fit quality (less than 10) but terrifying cross section (greater than 90)​nLostTracksIIIIIIWhile fit a linear regression for x-sect – Lumi plot, it shows that the value of x-sect depends on the luminosity!!​ y = - 0.295319x + 79.1734​Thank you for your attention
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  1. Background
  2. ApproachBegan
  3. Simulation
  4. details
  5. SimulationPic
  6. Simulation2
  7. Data
  8. DataDistribution
  9. Luminosity
  10. PU
  11. GetDis2
  12. GetDisVariables
  13. Var1
  14. Var2
  15. DataDistribution2
  16. DataDistribution2
  17. Mixing
  18. Mixing 2
  19. Mixing 3
  20. 2Dis
  21. Compare
  22. ComparePic2
  23. Compare2
  24. CS
  25. CS2
  26. CS3
  27. BackToStart
  28. Reliability
  29. PostFit
  30. PullPlot
  31. FitQuality
  32. SelectedVariables
  33. reliability2
  34. Etracted CS for era B
  35. BackToStart2
  36. Results
  37. SelectedVar for all eras
  38. CS for all eras
  39. Results2
  40. BackToStart3
  41. Anomalies
  42. Explain
  43. Anomalies2
  44. collage
  45. Anomaly 1
  46. Anomaly 2
  47. Anomaly 3
  48. Anomalies3
  49. BackToStart4
  50. Final