The lepton+jets Selection and Determination of the Lepton Fake Rate with the Full RunIIb Data Set

Thesis/Dissertation · Tue Jan 01 00:00:00 EST 2013

DOI:https://doi.org/10.3929/ethz-a-009789965· OSTI ID:1437294

Meister, Daniel ^[1]

---

1. Zurich, ETH

This thesis presents the combined single top and $$ t\overline{ }\ t $$ lepton+jets selection for the full RunIIb dataset of the DØ detector. The selection uses the newest soft- ware versions including all standard central object identifications and corrections and has various additions and improvements compared to the previous 7 . 3 fb - 1 $$ t\overline{ }\ t $$ selection and the previous single top selection in order to accommodate even more different analyses. The lepton fake rate $$\epsilon_{\rm QCD}$$ and the real lepton efficiency $$\epsilon_{\rm sig}$$ are estimated using the matrix method and different variations are considered in order to determine the systematic errors. The calculation has to be done for each run period and every set of analysis cuts separately. In addition the values for the exclusive jet bins and for the new single top analysis cuts have been derived and the thesis shows numerous control plots to demonstrate the excellent agreement between data and Monte Carlo.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1437294
• Report Number(s): FERMILAB-MASTERS-2013-10; 1672450
• Country of Publication: United States
• Language: English