Abstract
The uncertainty of the measurement of the jet kinematics after the calibration (jet energy scale uncertainty, or JES uncertainty) is the dominant experimental uncertainty for numerous physics results and for the inclusive jet cross section measurement discussed in this thesis.
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Notes
- 1.
This is the largest fully instrumented region where test-beam information is available, as detailed in Sect. 6.2.2.
- 2.
The truth isolation cut has a negligible impact on the average jet response given that truth jets are matched to isolated reconstructed jets.
- 3.
This means that one multiplies the value of the centre of the bin (in terms of truth jet \(p_{T}\)) by the average response so to transform the coordinate of the x axis into \(p_\mathrm{T}^{\mathrm {jet}} \). This procedure is described in detail in Ref. [13].
- 4.
This is a ‘bootstrapping’ problem since jets that are used to derive new calibration constants still must satisfy the \(p_{T}>\)7 GeV reconstruction threshold. A solution to this could be to decrease the reconstruction threshold and/or use two iterations for deriving the calibration so that all jets with \(p_{T}>\)7 GeV used for physics analysis are correctly calibrated, but it wasn’t considered practical in the timescale needed to provide the calibration constants for the reprocessing.
- 5.
Time-dependent noise changes for single cells in data are accounted for using periodic measurements of the cell noise.
- 6.
Preliminary studies have been performed to estimate the bin-to-bin correlations for the dead material component using separate subsamples. These are not reported here, but they can be found in the presentation given in [27].
- 7.
The reference bin is chosen where the uncertainty is largest to keep the correlations as faithful as possible in the neighboring bins.
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Doglioni, C. (2012). Jet Energy Scale Uncertainty. In: Measurement of the Inclusive Jet Cross Section with the ATLAS Detector at the Large Hadron Collider. Springer Theses. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-30538-2_6
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