Projects per year
Abstract
A precise measurement of the invisible width of the Z boson produced in proton-proton collisions at a center-of-mass energy of 13 TeV is presented using data recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 36.3 fb$^{-1}$. The result is obtained from a simultaneous fit to kinematic distributions for two data samples of Z boson plus jets: one dominated by Z boson decays to invisible particles and the other by Z boson decays to muon and electron pairs. The invisible width is measured to be 523 $\pm$ 3 (stat) $\pm$ 16 (syst) MeV. This result is the first precise measurement of the invisible width of the Z boson at a hadron collider, and is the single most precise direct measurement to date, competitive with the combined result of the direct measurements from the LEP experiments.
Original language | English |
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Article number | 137563 |
Number of pages | 22 |
Journal | Phys. Lett. B |
Volume | 842 |
Issue number | 2023 |
DOIs | |
Publication status | Published - 10 Jul 2023 |
Bibliographical note
Replaced with the published version. Added the journal reference. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SMP-18-014 (CMS Public Pages)Keywords
- hep-ex
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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
Datasets
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Precision measurement of the Z boson invisible width in pp collisions at $\sqrt{s}$ = 13 TeV
Blekman, F. (Creator), Bols, E. S. (Creator), D'Hondt, J. (Creator), Delcourt, M. (Creator), El Faham, H. (Creator), Lowette, S. (Creator), Moortgat, S. (Creator), Morton, A. (Creator), Müller, D. (Creator), Sahasransu, A. R. (Creator), Tavernier, S. (Creator), Van Doninck, W. (Creator) & Stylianou, N. (Creator), HEPData, 20 Jun 2022
DOI: 10.17182/hepdata.130965, https://www.hepdata.net/record/ins2096380
Dataset