HERWIG validation report ATLAS MC Validation Meeting 24

HERWIG validation report ATLAS MC Validation Meeting, 24 May 2011 Responsibles: Jon Butterworth (UCL), Claire Gwenlan (Oxford), Daniela Rebuzzi (Pavia, INFN) Today: validation for MC 11 (16. 6. 5. Y, AUET 2 -LO** tune, HERWIG 6. 520) (SM validation: D. Rebuzzi; SUSY validation: C. Gwenlan)

Fortran HERWIG validation AIM • Validation of athena 16. 6. 5. Y (including MC 10 Job. Options to MC 11 Job. Options migration, change to new evgen transform Generate_trf. py, HERWIG version update and new AUET 2 -LO** tune) for MC 11 production • Check impact of new “AUET 2 -LO**” tune for Herwig/Jimmy – details documented in ATL-PHYS-PUB-2011 -008 validation samples NB HERWIG version updated to 6. 520 for MC 11 [majority of updates in 6. 520 already in our patches for 6. 510 ] 1. 15. 6. 14. 7, MC 10 Job. Options, AUET 1 tune (Baseline MC 10 sample) 2. 16. 6. 5. 3, MC 11 Job. Options, AUET 1 tune [checking athena and HW version updates only] 3. 16. 6. 5. 3, MC 11 Job. Options, AUET 2 -LO** tune Conclusion: no problematic issues observed 1

HERWIG SUSY validation • Validation Sample. Bs (50 k events) – mc 10_valid. 105403. SU 3_jimmy_susy. recon. AOD. e 787_a 124 (MC 10 JOs, 15. 6. 14. 7, AUET 1 tune) – private samples (MC 11 JOs, 16. 6. 5. 3, HW 6. 520, AUET 1 tune) – mc 11_valid. 105403. SU 3_jimmy_susy. recon. AOD. e 789_a 124 (MC 11 JOs, 16. 6. 5. 3, HW 6. 520, AUET 2) example: dilepton mass (OSSF) ratio of black/red SUSY validation: all distributions looks sensible and within expectations (one small issue I would like to understand a bit better – see later) 2

HERWIG SUSY validation electrons number of events MET Anti-Kt 4 truth jets number of events Some more examples (further plots in extras) – look OK 3

HERWIG SUSY validation Possibly some observable difference in e. g. jet multiplicity • Trend appears more to do with athena/HERWIG update than due to PDF/tune change number of events i. e. green and black, run in same athena version but with different tunes, look similar p. T > 20 Ge. V, |eta|<5 Anti-Kt 4 4

Summary validation status: • 16. 6. 5. 3 (MC 11 Job. Options) checked against baseline of 15. 6. 14. 7 (MC 10 Job. Options) – Log files visually checked to ensure correct parameter settings ✔ – Distributions look sensible given new PDF/tune (and HERWIG version) • AUET 2 -LO** tune vs AUET 1 -LO* (using 16. 6. 5. 3; MC 11 Job. Options) – Some differences observed in e. g. jet multiplicities – appears to be to do with (athena/)HERWIG update rather than tune • (differences are likely understandable; will perform some more checks to pin down in next couple of days) 5

Extras 6

HERWIG SUSY validation (cont. ) Sample. B plots using Evgen_trf. py (r 15) or Generate_trf. py (r 16) @ 7 Te. V (followed by csc_add. Truth. Jet. Met_trf. py) config tags: 1. e 787 (MC 10 JOs, 15. 6. 14. 7, AUET 1 -LO* tune) 2. private samples (MC 11 JOs, 16. 6. 5. 3, AUET 1 -LO* tune) 3. e 789 (MC 11 JOs, 16. 6. 5. 3, AUET 2 -LO** tune) 28 July'08 7

HERWIG SUSY validation number of events MET quantities ratios of black/red 8

number of events HERWIG SUSY validation electron quantities 9

HERWIG SUSY validation electron quantities ratios of black/red 10

number of events HERWIG SUSY validation muon quantities 11

HERWIG SUSY validation muon quantities ratios of black/red 12

number of events HERWIG SUSY validation photon quantities 13

HERWIG SUSY validation photon quantities ratios of black/red 14

HERWIG SUSY validation OSSF electrons number of events OSSF elecs+muons number of events dilepton masses SSSF elecs+muons OSSF muons 15

HERWIG SUSY validation dilepton masses ratios of black/red 16

HERWIG SUSY validation number of events p. T > 20 Ge. V, |eta|<5 number of events jets quantities: anti-kt 4 17

HERWIG SUSY validation jets quantities: anti-kt 4 ratios of black/red 18

HERWIG SUSY validation number of events p. T > 20 Ge. V, |eta|<5 number of events jets quantities: cone 4 19

HERWIG SUSY validation jets quantities: cone 4 ratios of black/red 20

HERWIG SUSY validation number of events SUSY “ 4 -jet, 0 -lepton” analysis (anti-kt 4 jets) 21

HERWIG SUSY validation SUSY “ 4 -jet, 0 -lepton” analysis (anti-kt 4 jets) ratios of black/red 22