73X Validation, Feb. 23 rd, 2015 Robert Schöfbeck, Mariarosaria D’Alfonso, Matthias Weber report on 73X rereco Feb. 23 th, 2015 Robert Schoefbeck, Mariarosaria D’Alfonso, Matthias Weber

2 73X Validation, Feb. 23 rd, 2015 Robert Schöfbeck, Mariarosaria D’Alfonso, Matthias Weber 8 TeV samples o 1M JetHT, 1.6M zMu skim of DoubleMu Run2012D rerecoed with HCAL method 2 in 7_3_2_patch1 o DAS link

3 73X Validation, Feb. 23 rd, 2015 Robert Schöfbeck, Mariarosaria D’Alfonso, Matthias Weber o study MET resolution in Z to μμ o more plots: o resolution (RMS/scale) comparable between 53X and 73X o ~6-10% lower scale attributed to calorimetry changes o not the final PF calibration, small trend in tkMET under study o more plots: DoubleMu zSkim rereco’d 53X 73X

4 73X Validation, Feb. 23 rd, 2015 Robert Schöfbeck, Mariarosaria D’Alfonso, Matthias Weber MET tail: JetHT 53X vs. 73X o picked run o comparing 73X JetHT HcalExtValid v2 RECO against 53X Jan22 rereco in AOD o MET filters applied in both 53X and 73X o JSON applied: gives ~6k events o these data are available on EOS in 53X and 73X o aim of the study: identify sumET and MET outliers also for sub-sums according to pfCand species

5 MET and sum(E T ) scatter plots immediate observations: 1.seemingly smallish correlation in bulk MET region (blue arrow) 2.different events in the MET tails (red arrows) 3.sum(E T ) relatively well under control (right plot)

6 o look at φ (MET) in order to understand the seemingly small correlation in bulk MET o Conclusion: correlation is OK, looks as expected MET phi MET(53X)>50 all events

7 o What is the energy composition of events in the tails? o First, disentangle pfCandidate species and look at sum(Pt) and sub-MET scatter plots o While there are sum(E T ) outliers from h0, the MET looks under control. Suggest DPGs investigate a few off-diagonal events. MET outliers from neutrals neutrals ‘h0’

8 o What is the energy composition of events in the tails? o charged sumPt much higher (as usual) o sum(Pt) relatively well under control, few outliers in MET, suggest DPGs investigate a few off-diagonal events. MET outliers from charged charged ‘h’

9 o What is the energy composition of events in the tails? o HF (here showing charged component) seems fine o No issues observed in HF whatsoever MET outliers from HF ‘h_HF’

10 MET outliers from gammas/e ‘gamma’ ‘e’ same events as on p3 Energy is going back and forth between e and gamma. Correlated with MET outliers.

11 event lists o created lists of outliers in MET and sumPt for all species: (open file w/o line wrap) o example: outliers in total MET (c/p the event numbers from the text file)

12 debugging MET tails Quoting always “53X → 73X” 1.pfMET 28.1 → : sumPt(h0) → 46.0 (MET(h0) small), sumPt(gamma) 250 → 570, MET(gamma) : 25.6 → pfMET 11.7 → (similar characteristics), MET(gamma): 12.8 → pfMET 42.0 → 211.6; MET(h) → 208.6, MET(h0) → 37.7,MET(gamma) → 50.9 sumPt(h) → pfMET 4.7 → (h ~ unchanged, MET(h0) unchanged, small), MET(gamma) 12.3 → pfMET 84.4 → MET(h) → 201.0, MET(mu) 140 → 0 6.pfMET 66.8 → (?) 200 GeV change in sumPt(h), several smaller changes 7.pfMET → MET(gamma) 20.1 → pfMET 12.9 → MET(gamma) 21.8 → pfMET 34.8 → small changes in h0, h, gamma are adding up 10.pfMET → 33.2, MET(h) → pfMET → 43.8, MET(h) → pfMET → 12.6, MET(h) 24.6 → pfMET → 8.7, MET(gamma) → 43.7, MET(mu) 47.2 → X > 53X 73X < 53X event numbers of prominent outliers

13 o Energy going back and forth between e and gamma. This feature is related to the most prominent outliers in the total MET. o one event (208352:15: ) with a 140 GeV muon apparently lost in 73X (seems to create MET) o several events have significantly less MET in 73X (seems related to charged hadrons ‘h’) o retrieved 73X outliers on next slide for further study in cmsShow etc. /eos/cms/store/group/phys_jetmet/schoef/pickEvents/73X-RECO-pickEvents more on MET tails

14 list of events with large MET(gamma) o top half: more MET(gamma) in 73X. Up to 400 GeV difference. picture is similar for sumPt and for electrons o bottom half: less MET(gamma) in 73X. Up to 230 GeV diff. o go here to c/p list:

15 Summary o Spotted several differences in the 53X and 73X MET tails related to e/gamma, mu, h o apparently less issues with h0, no problems with HF o event lists are ready for DPGs to study o MET scale and resolution seem under control

16 Backup

17 73X Validation, Feb. 23 rd, 2015 Robert Schöfbeck, Mariarosaria D’Alfonso, Matthias Weber sanity check: DQM o compare with 71X relvals and compare broad characteristics of reconstruction methods. o reference sample: /JetHT/CMSSW_7_1_0- GR_R_71_V6_RelVal_jet2012D-v1/DQM Expect to see changes related to: o timing HCAL and ECAL o PFcalibration (hadrons and egamma) o link to central DQM GUI (thanks to Matthias!!) GR_R_73_V0_HcalExtValid_RelVal_jet2012D- v1/DQMIO;sampletype=offline_data;filter=all;referencepos=overlay;referenceshow=all;referenceobj1=other::/JetHT/CMSSW_7_1_0- GR_R_71_V6_RelVal_jet2012D- v1/DQM:;referenceobj2=none;referenceobj3=none;referenceobj4=none;search=;striptype=object;stripruns=;stripaxis=run;stripomit=non e;workspace=Everything;size=M;root=JetMET/MET/pfMet/Cleaned;focus=JetMET/MET/pfMet/Cleaned/PfNeutralHadronEt;zoom=no;

18 sanity check vs. 71X DQM/MET JetHT run HcalExtValid JetHT run CMSSW_7_1_0-GR_R_71_V6_RelVal

19 73X Validation, Feb. 23 rd, 2015 Robert Schöfbeck, Mariarosaria D’Alfonso, Matthias Weber o MET agrees within stat. MET tail not worrisome o plot on previous slide is for a dijet selection o lower photon ET (as expected) o lower neutral ET (as expected) o higher HF hadron ET o was this expected? o sumET reduced by ~1.5% o other fractions vary consistently sanity check vs. 71X DQM/MET

20 73X Validation, Feb. 23 rd, 2015 Robert Schöfbeck, Mariarosaria D’Alfonso, Matthias Weber JetHT run HcalExtValid JetHT run CMSSW_7_1_0-GR_R_71_V6_RelVal sanity check vs. 71X DQM/Jets (AK4PF) o lower neutral hadron energy o higher HF energy o improvement of eta ‘horns’

21 jetHT rereco’d o looking for spectacular mis-reco o comparing: 1. HLT_HT750 triggered data 2. applying recommended MET filters 3. applying offline HT + dijet requirement filters remove high MET noise noise removed

22 jetHT rereco’d o left: p T of leading jet o middle: neutral had. e.f. (nhef) of leading jet o right: max (nhef) per event for all jets > 100 GeV o Summary: HCAL noise effectively removed, no sign of residual noise. No hints of unforseen effects found. Note: This study is not sensitive to % level effects in calo reco o more plots:

23 73X Validation, Feb. 23 rd, 2015 Robert Schöfbeck, Mariarosaria D’Alfonso, Matthias Weber Conclusion o Checked JetHT and DoubleMu zSkim rereco’d data o JetHT o Nothing worrying found, observed changes in line with reconstruction o Double Mu zSkim Run2012D o MET resolution comparable o MET scale 6-10% lower in 73X