Name: Measurement of the Z boson invisible width at $\sqrt{s}=13$ TeV with the ATLAS detector
Creator: ATLAS Collaboration
Published: 2024

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Aad, Georges et al.
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Accessed 177 times Last updated on 2024-06-28 11:14

Measurement of the Z boson invisible width at

\sqrt{s} = 13

TeV with the ATLAS detector

The ATLAS collaboration

Aad, Georges , Abbott, Braden Keim , Abeling, Kira , Abicht, Nils Julius , Abidi, Haider , Aboulhorma, Asmaa , Abramowicz, Halina , Abreu, Henso , Abulaiti, Yiming , Acharya, Bobby Samir

Phys.Lett.B 854 (2024) 138705, 2024.

https://doi.org/10.17182/hepdata.151651.v1

Abstract (data abstract)

CERN-LHC. A measurement of the invisible width of the

Z

boson using events with jets and missing transverse momentum is presented using 37

fb^{- 1}

of 13 TeV proton--proton data collected by the ATLAS detector in 2015 and 2016. The ratio of

Z \to inv

Z \to ℓ ℓ

events, where inv refers to non-detected particles and

ℓ

is either an electron or a muon, is measured and corrected for detector effects. Events with at least one energetic central jet with

p_{T} \geq 110

GeV are selected for both the

Z \to inv

and

Z \to ℓ ℓ

final states to obtain a similar phase space in the ratio. The invisible width is measured to be

506 \pm 2 (stat.) \pm 12 (syst.)

MeV and is the single most precise recoil-based measurement. The result is in agreement with the most precise determination from LEP and the Standard Model prediction based on three neutrino generations.

Table 1

10.17182/hepdata.151651.v1/t1

Measured invisible width of the $Z$ boson, $Γ (Z \to inv)$ .
Table 2

Data from Figure 3 (left), located on page 7.

10.17182/hepdata.151651.v1/t2

Measured $R_{e e}^{miss}$ .
Table 3

Data from Figure 3 (right), located on page 7.

10.17182/hepdata.151651.v1/t3

Measured $R_{μ μ}^{miss}$ .
Table 4

Data from Table 1, located on page 6.

10.17182/hepdata.151651.v1/t4

Impact of systematic uncertainties on measured invisible width of the Z boson.

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