TY - JOUR
T1 - Measurement of the Z boson invisible width at s=13 TeV with the ATLAS detector
AU - Aad, G.
AU - Åkesson, T.P.A.
AU - Doglioni, C.
AU - Ekman, P.A.
AU - Hedberg, V.
AU - Herde, H.
AU - Konya, B.
AU - Lytken, E.
AU - Poettgen, R.
AU - Simpson, N.D.
AU - Smirnova, O.
AU - Zwalinski, L.
AU - ATLAS Collaboration
PY - 2024
Y1 - 2024
N2 - 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→inv to Z→ℓℓ 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 pT≥110 GeV are selected for both the Z→inv and Z→ℓℓ final states to obtain a similar phase space in the ratio. The invisible width is measured to be 506±2(stat.)±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. © 2024 The Author(s)
AB - 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→inv to Z→ℓℓ 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 pT≥110 GeV are selected for both the Z→inv and Z→ℓℓ final states to obtain a similar phase space in the ratio. The invisible width is measured to be 506±2(stat.)±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. © 2024 The Author(s)
U2 - 10.1016/j.physletb.2024.138705
DO - 10.1016/j.physletb.2024.138705
M3 - Article
SN - 0370-2693
VL - 854
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
M1 - 138705
ER -