Precision measurement of the Z boson invisible width in pp collisions at $\sqrt{s}$ = 13 TeV

CMS Collaboration

doi:10.1016/j.physletb.2022.137563

Precision measurement of the Z boson invisible width in pp collisions at $\sqrt{s}$ = 13 TeV

CMS Collaboration

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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
Article number	137563
Number of pages	22
Journal	Phys. Lett. B
Volume	842
Issue number	2023
DOIs	https://doi.org/10.1016/j.physletb.2022.137563
Publication status	Published - 10 Jul 2023

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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)

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hep-ex

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10.1016/j.physletb.2022.137563Licence: CC BY

1-s2.0-S0370269322006979-mainFinal published version, 867 KBLicence: CC BY

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@article{81fd2556eace498381637b3b1bdf1e69,

title = "Precision measurement of the Z boson invisible width in pp collisions at \$\textbackslash{}sqrt\{s\}\$ = 13 TeV",

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\$\textasciicircum{}\{-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 \$\textbackslash{}pm\$ 3 (stat) \$\textbackslash{}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. ",

keywords = "hep-ex",

author = "\{CMS Collaboration\} and Freya Blekman and Jorgen D'Hondt and Martin Delcourt and \{El Faham\}, Hesham and Steven Lowette and Alexander Morton and Denise M{\"u}ller and Sahasransu, \{Abanti Ranadhir\} and Stefaan Tavernier and \{Van Doninck\}, Walter and Bols, \{Emil S{\o}rensen\} and Seth Moortgat and Nicolas Stylianou",

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)",

year = "2023",

month = jul,

day = "10",

doi = "10.1016/j.physletb.2022.137563",

language = "English",

volume = "842",

journal = "Phys. Lett. B",

issn = "0370-2693",

publisher = "Elsevier",

number = "2023",

}

TY - JOUR

T1 - Precision measurement of the Z boson invisible width in pp collisions at $\sqrt{s}$ = 13 TeV

AU - CMS Collaboration

AU - Blekman, Freya

AU - D'Hondt, Jorgen

AU - Delcourt, Martin

AU - El Faham, Hesham

AU - Lowette, Steven

AU - Morton, Alexander

AU - Müller, Denise

AU - Sahasransu, Abanti Ranadhir

AU - Tavernier, Stefaan

AU - Van Doninck, Walter

AU - Bols, Emil Sørensen

AU - Moortgat, Seth

AU - Stylianou, Nicolas

N1 - 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)

PY - 2023/7/10

Y1 - 2023/7/10

N2 - 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.

AB - 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.

KW - hep-ex

UR - https://www.scopus.com/pages/publications/85162818851

U2 - 10.1016/j.physletb.2022.137563

DO - 10.1016/j.physletb.2022.137563

M3 - Article

SN - 0370-2693

VL - 842

JO - Phys. Lett. B

JF - Phys. Lett. B

IS - 2023

M1 - 137563

ER -

Precision measurement of the Z boson invisible width in pp collisions at $\sqrt{s}$ = 13 TeV

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