1 / 18

Fake Lepton Rate in EXO Seesaw Type III

Fake Lepton Rate in EXO Seesaw Type III . Ezio Torassa (INFN Padova) Andrea Gozzelino (INFN LNL). Outline. References General overview Objects definition Data sample and trigger Method details Manpower. References. List of analyses using the method described in the rest of the talk.

eugene
Download Presentation

Fake Lepton Rate in EXO Seesaw Type III

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Fake leptons working group Fake Lepton Rate in EXO Seesaw Type III Ezio Torassa (INFN Padova) Andrea Gozzelino (INFN LNL)

  2. Fake leptons working group Outline • References • General overview • Objects definition • Data sample and trigger • Method details • Manpower

  3. Fake leptons working group References List of analyses using the method described in the rest of the talk. Pointers to CADI lines and relevant ANs. • No yet CADI line for PAS • CMS AN-2013/135 in WorkingGroup: EXO, EXO non hadronic sub group • Title: Search for heavy lepton partners of neutrinos in pp collisions at 8 TeV, in the context of Type III seesaw mechanism http://cms.cern.ch:80/iCMS/jsp/openfile.jsp?tp=draft&files=AN2013_135_v2.pdf • Fakeestimationissimilar to the methodused in the seesawtype III paperpublished in 2013 with 7 TeV data. • http://cms.cern.ch/iCMS/analysisadmin/cadi?ancode=EXO-11-073 • http://arxiv.org/pdf/1210.1797v1.pdf

  4. Fake leptons working group General overview STEP 1: Fake leptons rate STEP 2: Apply FR to three leptons final state Analysis objects (A) Fake objects (F) FR(electron) FR(muon) FR(lepton) is medium value Fake contributions are backgrounds, in addition to SM processes and Dalitz events.

  5. Fake leptons working group Analysis objects (A) Fake objects (F) Muon < 50 < 0.2 cm < 0.40

  6. Fake leptons working group Analysis objects (A) Fake objects (F) Electron Remove selection < 0.60

  7. Fake leptons working group Data and triggers for FR JetHT Primary Dataset (8 TeV data collected in 2012) Single lepton prescaled triggers MC samples and closure test No MC control samples are used. No closure test on MC samples is done.

  8. Fake leptons working group Step 1 • Events with atleastonelepton (single leptontriggersthresolds); • Opposite jet with momentumabove 60 GeV; • Missingtransverseenergybelow 20 GeV; • Transverse mass betweenmissingtransverseenergy and leptonbelow 20 GeV; • Reduce contamination from electroweakprocesses (W and Z bosons) • Filter on events with opposite signsameflavorleptonsinvariant mass in Z peak. • Reduce contamination from electroweakprocesses (Z boson) • (similar veto in the analysis) Calculation is done on a sample with non prompt leptons (leptons not coming from primary vertex); in the analysis Double Mu, Double Ele and MuEG primary dataset are used. Selections are quite similar to what is applied in the analysis flow.

  9. Fake leptons working group Step 1 results Muon Electron Pt > 10 GeV Pt > 10 GeV

  10. Fake leptons working group Step 1 uncertainty Conservative estimation based on references  50 % Systematic source is dominant. All 2012 data are taken in account.

  11. Fake leptons working group Step 2 results

  12. Fake leptons working group Manpower and future What is the manpower available in your group for the next 2-3 months? What are the developments to your fake lepton estimate that you envisage to focus on in the short-medium term? In next two-three months, Padua group has no manpower available for the FR studies. A PhD thesis about seesaw type III in three leptons final state is ending (Jan 30 th 2014), updated FR estimation could be included in the future PAS.

  13. Fake leptons working group Thank you very much !!!

  14. Fake leptons working group Backup slides

  15. Fake leptons working group EXO seesaw type III

  16. Fake leptons working group EXO seesaw type III

  17. Fake leptons working group

  18. Fake leptons working group

More Related