Luminosity determination using Z boson production at the CMS experiment
Name
10052_2023_Article_12268.pdf
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2.69 MB
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Adobe PDF
Checksum (MD5)
685faac8059233fc1160018e25211a85
Date Issued
January 10, 2024
Publisher
Springer Berlin Heidelberg
Citation
The European Physical Journal C. 2024 Jan 10;84(1):26
Version
Final published version
Abstract
The measurement of Z boson production is presented as a method to determine the integrated luminosity of CMS data sets. The analysis uses proton–proton collision data, recorded by the CMS experiment at the CERN LHC in 2017 at a center-of-mass energy of 13
$$\,\text {Te\hspace{-.08em}V}$$
Te
V
. Events with Z bosons decaying into a pair of muons are selected. The total number of Z bosons produced in a fiducial volume is determined, together with the identification efficiencies and correlations from the same data set, in small intervals of 20
$$\,\text {pb}^{-1}$$
pb
-
1
of integrated luminosity, thus facilitating the efficiency and rate measurement as a function of time and instantaneous luminosity. Using the ratio of the efficiency-corrected numbers of Z bosons, the precisely measured integrated luminosity of one data set is used to determine the luminosity of another. For the first time, a full quantitative uncertainty analysis of the use of Z bosons for the integrated luminosity measurement is performed. The uncertainty in the extrapolation between two data sets, recorded in 2017 at low and high instantaneous luminosity, is less than 0.5%. We show that the Z boson rate measurement constitutes a precise method, complementary to traditional methods, with the potential to improve the measurement of the integrated luminosity.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1140/epjc/s10052-023-12268-2
