Projects per year
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 TeV. 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 2 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.
Original language | English |
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Article number | 26 |
Number of pages | 28 |
Journal | Eur. Phys. J. C |
Volume | 84 |
Issue number | 2024 |
DOIs | |
Publication status | Published - 10 Jan 2024 |
Bibliographical note
Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/LUM-21-001 (CMS Public Pages)Keywords
- hep-ex
- physics.ins-det
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EU674: iSAS: Innovate for Sustainable Accelerating Systems
D'Hondt, J., Tytgat, M. & D'Hondt, J.
1/03/24 → 29/02/28
Project: Fundamental
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iBOF/23/074: Unlocking the charm-Higgs coupling at the LHC
Lowette, S., D'Hondt, J., D'Hondt, J., Lowette, S., Van Mechelen, P. & Dobur, D.
1/01/23 → 31/12/26
Project: Fundamental