1 / 13

Diphoton + MET: Revised QCD Background Estimates

Diphoton + MET: Revised QCD Background Estimates. Bruce Schumm Ben Auerbach UC Santa Cruz / SCIPP ANL 23 May 2013 Informal Photons + MET meeting. Control Sample Definitions. Remember: Using MetRefFinal, and QCDtg: One tight, one control QCDg: No tight, once control Also can have

cjonas
Download Presentation

Diphoton + MET: Revised QCD Background Estimates

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. Diphoton + MET: Revised QCD Background Estimates Bruce Schumm Ben Auerbach UC Santa Cruz / SCIPP ANL 23 May 2013 Informal Photons + MET meeting

  2. Control Sample Definitions • Remember: Using MetRefFinal, and • QCDtg: One tight, one control • QCDg: No tight, once control • Also can have • 50 or 75 GeV ET cut on all (pseudo) photons • Isolation cut or not on pseudo photon (“t” photon is isolated) • Nominal control sample is QCDtg50NoIso • MC studies indicate good reproduction of tight-tight MET distribution • MC studies also suggest QCDg is OK for LocHadTopo

  3. SP1, SP2 Direct Estimates

  4. SP1 Extrapolations PARABOLIC LINEAR EXPONENTIAL

  5. SP2 Extrapolations PARABOLIC LINEAR EXPONENTIAL

  6. Also… LocHadTopo Put it all together: SP1: 0.10 +- 0.10 events SP2: 0.15 +- 0.15 events See Note for incontrovertible reasoning.

  7. WP1 QCD Background  All alternative estimates high; inflate error  WP1 background of 0.40 +- 0.40 events

  8. WP2 QCD Background  All consistent with nominal (green)  WP2 background of 0.90 +- 0.35 events

  9. MIS QCD Background  All consistent with nominal (green)  WP2 background of 0.70 +- 0.30 events

  10. Summary of QCD Background Results

More Related