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Energy Calibration of the Tile L1Calo and data driven estimation of non-prompt $e$, $\mu$ and $\tau$ background using data from the ATLAS detector.
Stockholm University, Faculty of Science, Department of Physics. (Elementarpartikelfysik)ORCID iD: 0000-0001-9358-3505
2018 (English)Licentiate thesis, monograph (Other academic)
Abstract [en]

The ATLAS detector located at the Large Hadron Collider (LHC) on the border of Switzerland and France is a multipurpose particle detector that is used to probe the Universe's tiniests constituents. Following the discovery of the Higgs boson in 2012, physicists at the LHC are searching for physics beyond the Standard model and doing precision measurements. One major background to the signal for many analyses is the misidentification of objects in the detector. This non-prompt background is estimated in this thesis using a data driven method called the Matrix Method for $e$, $\mu$ and $\tau$ leptons. For the estimation, 36 $\mathrm{ fb^{-1}}$ of proton-proton collisions at $\sqrt{s} = 13$ TeV data recorded by the ATLAS detector is used. The estimation is successfully implemented and agrees well with data.

Place, publisher, year, edition, pages
Stockholm University, 2018.
National Category
Subatomic Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-155092OAI: oai:DiVA.org:su-155092DiVA, id: diva2:1197160
Presentation
2018-05-08, 13:00 (English)
Supervisors
Available from: 2019-06-11 Created: 2018-04-12 Last updated: 2019-06-11Bibliographically approved

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