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Luminosity determination using Z boson production at the CMS experiment

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 20 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.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: European Physical Journal C, 2024, 84(1), 26

Editorial: Springer New York LLC

 Fecha de publicación: 01/01/2024

Nº de páginas: 28

Tipo de publicación: Artículo de Revista

 DOI: 10.1140/epjc/s10052-023-12268-2

ISSN: 1434-6044,1434-6052

Url de la publicación: https://doi.org/10.1140/epjc/s10052-023-12268-2

Autoría

HAYRAPETYAN A.

SANDEEP BHOWMIK

SERGIO BLANCO FERNANDEZ

JAVIER ANDRES BROCHERO CIFUENTES

MARCOS FERNANDEZ GARCIA

CLARA LASAOSA GARCIA

PABLO MATORRAS CUEVAS

EFREN NAVARRETE RAMOS

CEDRIC GERALD PRIEELS