cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.100351.v2/t57
title: "Table 57" of "Measurements of the inclusive and differential production cross sections of a top-quark-antiquark pair in association with a $Z$ boson at $\sqrt{s} = 13$ TeV with the ATLAS detector"

description: The total correlation matrix of the absolute particle-level differential cross-section measured in the fiducial phase-space as a function of the $p_{\textrm{T}}$ of the $Z$ boson in the 3$\ell$+4$\ell$ channel.
description: CERN-LHC-ATLAS. Measurements of the inclusive and differential fiducial cross-sections for $t\bar{t}+Z$ production in proton-proton collisions at a centre-of-mass energy of 13 TeV with 139 fb−1 of data collected between 2015 and 2018. 

The fiducial regions for the trilepton channel are defined as:
- Exactly 3 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 20 GeV for leading, subleading and third lepton, respectively.
- The sum of the three lepton charges is required to be $\pm$1.
- At least one opposite-sign-same-flavour (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Two orthogonal regions combined for inclusive measurement, different region for differential measurement.
- $b$-jets requirements: pseudo-continuous $b$-tagging with different working points for inclusive measurement, fixed 85% $b$-tagging working point for differential measurement. 
- At least 3 (inclusive and differential region) or 4 (inclusive region) jets

The fiducial regions for the tetralepton channel are defined as:
- Exactly 4 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 10, 7 GeV for leading, subleading, third and fourth lepton, respectively.
- The sum of the four lepton charges is required to be zero.
- At least one opposite-sign-same-flavor (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Four regions separated based on $b$-jets multiplicity (1$b$ or 2$b$ jets at 85% $b$-tagging working point) and flavour composition of the non-$Z$ lepton pair (same flavour, different flavour).
- At least 2 jets.
- $E_{T}^{miss}$ requirements (depending on the region) for suppresion of $ZZ$+jets background.
DOI: 10.17182/hepdata.100351.v2/t58
title: "Table 58" of "Measurements of the inclusive and differential production cross sections of a top-quark-antiquark pair in association with a $Z$ boson at $\sqrt{s} = 13$ TeV with the ATLAS detector"

description: The total correlation matrix of the absolute particle-level differential cross-section measured in the fiducial phase-space as a function of the absolute value of rapidity of the $Z$ boson in the 3$\ell$+4$\ell$ channel.
description: CERN-LHC-ATLAS. Measurements of the inclusive and differential fiducial cross-sections for $t\bar{t}+Z$ production in proton-proton collisions at a centre-of-mass energy of 13 TeV with 139 fb−1 of data collected between 2015 and 2018. 

The fiducial regions for the trilepton channel are defined as:
- Exactly 3 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 20 GeV for leading, subleading and third lepton, respectively.
- The sum of the three lepton charges is required to be $\pm$1.
- At least one opposite-sign-same-flavour (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Two orthogonal regions combined for inclusive measurement, different region for differential measurement.
- $b$-jets requirements: pseudo-continuous $b$-tagging with different working points for inclusive measurement, fixed 85% $b$-tagging working point for differential measurement. 
- At least 3 (inclusive and differential region) or 4 (inclusive region) jets

The fiducial regions for the tetralepton channel are defined as:
- Exactly 4 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 10, 7 GeV for leading, subleading, third and fourth lepton, respectively.
- The sum of the four lepton charges is required to be zero.
- At least one opposite-sign-same-flavor (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Four regions separated based on $b$-jets multiplicity (1$b$ or 2$b$ jets at 85% $b$-tagging working point) and flavour composition of the non-$Z$ lepton pair (same flavour, different flavour).
- At least 2 jets.
- $E_{T}^{miss}$ requirements (depending on the region) for suppresion of $ZZ$+jets background.
DOI: 10.17182/hepdata.100351.v2/t59
title: "Table 59" of "Measurements of the inclusive and differential production cross sections of a top-quark-antiquark pair in association with a $Z$ boson at $\sqrt{s} = 13$ TeV with the ATLAS detector"

description: The total correlation matrix of the absolute particle-level differential cross-section measured in the fiducial phase-space as a function of the $p_{\textrm{T}}^{l \textrm{non-}Z}$ in the 3$\ell$ channel.
description: CERN-LHC-ATLAS. Measurements of the inclusive and differential fiducial cross-sections for $t\bar{t}+Z$ production in proton-proton collisions at a centre-of-mass energy of 13 TeV with 139 fb−1 of data collected between 2015 and 2018. 

The fiducial regions for the trilepton channel are defined as:
- Exactly 3 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 20 GeV for leading, subleading and third lepton, respectively.
- The sum of the three lepton charges is required to be $\pm$1.
- At least one opposite-sign-same-flavour (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Two orthogonal regions combined for inclusive measurement, different region for differential measurement.
- $b$-jets requirements: pseudo-continuous $b$-tagging with different working points for inclusive measurement, fixed 85% $b$-tagging working point for differential measurement. 
- At least 3 (inclusive and differential region) or 4 (inclusive region) jets

The fiducial regions for the tetralepton channel are defined as:
- Exactly 4 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 10, 7 GeV for leading, subleading, third and fourth lepton, respectively.
- The sum of the four lepton charges is required to be zero.
- At least one opposite-sign-same-flavor (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Four regions separated based on $b$-jets multiplicity (1$b$ or 2$b$ jets at 85% $b$-tagging working point) and flavour composition of the non-$Z$ lepton pair (same flavour, different flavour).
- At least 2 jets.
- $E_{T}^{miss}$ requirements (depending on the region) for suppresion of $ZZ$+jets background.
DOI: 10.17182/hepdata.100351.v2/t60
title: "Table 60" of "Measurements of the inclusive and differential production cross sections of a top-quark-antiquark pair in association with a $Z$ boson at $\sqrt{s} = 13$ TeV with the ATLAS detector"

description: The total correlation matrix of the absolute particle-level differential cross-section measured in the fiducial phase-space as a function of the $|\Delta \phi (Z, t_{\textrm{lep}})|/\pi$ in the 3$\ell$ channel.
description: CERN-LHC-ATLAS. Measurements of the inclusive and differential fiducial cross-sections for $t\bar{t}+Z$ production in proton-proton collisions at a centre-of-mass energy of 13 TeV with 139 fb−1 of data collected between 2015 and 2018. 

The fiducial regions for the trilepton channel are defined as:
- Exactly 3 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 20 GeV for leading, subleading and third lepton, respectively.
- The sum of the three lepton charges is required to be $\pm$1.
- At least one opposite-sign-same-flavour (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Two orthogonal regions combined for inclusive measurement, different region for differential measurement.
- $b$-jets requirements: pseudo-continuous $b$-tagging with different working points for inclusive measurement, fixed 85% $b$-tagging working point for differential measurement. 
- At least 3 (inclusive and differential region) or 4 (inclusive region) jets

The fiducial regions for the tetralepton channel are defined as:
- Exactly 4 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 10, 7 GeV for leading, subleading, third and fourth lepton, respectively.
- The sum of the four lepton charges is required to be zero.
- At least one opposite-sign-same-flavor (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Four regions separated based on $b$-jets multiplicity (1$b$ or 2$b$ jets at 85% $b$-tagging working point) and flavour composition of the non-$Z$ lepton pair (same flavour, different flavour).
- At least 2 jets.
- $E_{T}^{miss}$ requirements (depending on the region) for suppresion of $ZZ$+jets background.
DOI: 10.17182/hepdata.100351.v2/t61
title: "Table 61" of "Measurements of the inclusive and differential production cross sections of a top-quark-antiquark pair in association with a $Z$ boson at $\sqrt{s} = 13$ TeV with the ATLAS detector"

description: The total correlation matrix of the absolute particle-level differential cross-section measured in the fiducial phase-space as a function of the $|\Delta y (Z, t_{\textrm{lep}})|/\pi$ in the 3$\ell$ channel.
description: CERN-LHC-ATLAS. Measurements of the inclusive and differential fiducial cross-sections for $t\bar{t}+Z$ production in proton-proton collisions at a centre-of-mass energy of 13 TeV with 139 fb−1 of data collected between 2015 and 2018. 

The fiducial regions for the trilepton channel are defined as:
- Exactly 3 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 20 GeV for leading, subleading and third lepton, respectively.
- The sum of the three lepton charges is required to be $\pm$1.
- At least one opposite-sign-same-flavour (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Two orthogonal regions combined for inclusive measurement, different region for differential measurement.
- $b$-jets requirements: pseudo-continuous $b$-tagging with different working points for inclusive measurement, fixed 85% $b$-tagging working point for differential measurement. 
- At least 3 (inclusive and differential region) or 4 (inclusive region) jets

The fiducial regions for the tetralepton channel are defined as:
- Exactly 4 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 10, 7 GeV for leading, subleading, third and fourth lepton, respectively.
- The sum of the four lepton charges is required to be zero.
- At least one opposite-sign-same-flavor (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Four regions separated based on $b$-jets multiplicity (1$b$ or 2$b$ jets at 85% $b$-tagging working point) and flavour composition of the non-$Z$ lepton pair (same flavour, different flavour).
- At least 2 jets.
- $E_{T}^{miss}$ requirements (depending on the region) for suppresion of $ZZ$+jets background.
DOI: 10.17182/hepdata.100351.v2/t62
title: "Table 62" of "Measurements of the inclusive and differential production cross sections of a top-quark-antiquark pair in association with a $Z$ boson at $\sqrt{s} = 13$ TeV with the ATLAS detector"

description: The total correlation matrix of the absolute particle-level differential cross-section measured in the fiducial phase-space as a function of the number of jets in the 3$\ell$ channel.
description: CERN-LHC-ATLAS. Measurements of the inclusive and differential fiducial cross-sections for $t\bar{t}+Z$ production in proton-proton collisions at a centre-of-mass energy of 13 TeV with 139 fb−1 of data collected between 2015 and 2018. 

The fiducial regions for the trilepton channel are defined as:
- Exactly 3 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 20 GeV for leading, subleading and third lepton, respectively.
- The sum of the three lepton charges is required to be $\pm$1.
- At least one opposite-sign-same-flavour (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Two orthogonal regions combined for inclusive measurement, different region for differential measurement.
- $b$-jets requirements: pseudo-continuous $b$-tagging with different working points for inclusive measurement, fixed 85% $b$-tagging working point for differential measurement. 
- At least 3 (inclusive and differential region) or 4 (inclusive region) jets

The fiducial regions for the tetralepton channel are defined as:
- Exactly 4 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 10, 7 GeV for leading, subleading, third and fourth lepton, respectively.
- The sum of the four lepton charges is required to be zero.
- At least one opposite-sign-same-flavor (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Four regions separated based on $b$-jets multiplicity (1$b$ or 2$b$ jets at 85% $b$-tagging working point) and flavour composition of the non-$Z$ lepton pair (same flavour, different flavour).
- At least 2 jets.
- $E_{T}^{miss}$ requirements (depending on the region) for suppresion of $ZZ$+jets background.
DOI: 10.17182/hepdata.100351.v2/t63
title: "Table 63" of "Measurements of the inclusive and differential production cross sections of a top-quark-antiquark pair in association with a $Z$ boson at $\sqrt{s} = 13$ TeV with the ATLAS detector"

description: The total correlation matrix of the absolute particle-level differential cross-section measured in the fiducial phase-space as a function of the $|\Delta \phi (l_{t}^{+}, l_{\bar{t}}^{-})|/\pi$ in the 4$\ell$ channel.
description: CERN-LHC-ATLAS. Measurements of the inclusive and differential fiducial cross-sections for $t\bar{t}+Z$ production in proton-proton collisions at a centre-of-mass energy of 13 TeV with 139 fb−1 of data collected between 2015 and 2018. 

The fiducial regions for the trilepton channel are defined as:
- Exactly 3 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 20 GeV for leading, subleading and third lepton, respectively.
- The sum of the three lepton charges is required to be $\pm$1.
- At least one opposite-sign-same-flavour (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Two orthogonal regions combined for inclusive measurement, different region for differential measurement.
- $b$-jets requirements: pseudo-continuous $b$-tagging with different working points for inclusive measurement, fixed 85% $b$-tagging working point for differential measurement. 
- At least 3 (inclusive and differential region) or 4 (inclusive region) jets

The fiducial regions for the tetralepton channel are defined as:
- Exactly 4 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 10, 7 GeV for leading, subleading, third and fourth lepton, respectively.
- The sum of the four lepton charges is required to be zero.
- At least one opposite-sign-same-flavor (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Four regions separated based on $b$-jets multiplicity (1$b$ or 2$b$ jets at 85% $b$-tagging working point) and flavour composition of the non-$Z$ lepton pair (same flavour, different flavour).
- At least 2 jets.
- $E_{T}^{miss}$ requirements (depending on the region) for suppresion of $ZZ$+jets background.
DOI: 10.17182/hepdata.100351.v2/t64
title: "Table 64" of "Measurements of the inclusive and differential production cross sections of a top-quark-antiquark pair in association with a $Z$ boson at $\sqrt{s} = 13$ TeV with the ATLAS detector"

description: The total correlation matrix of the absolute particle-level differential cross-section measured in the fiducial phase-space as a function of the $|\Delta \phi (t\bar{t}, Z)|/\pi$ in the 4$\ell$ channel.
description: CERN-LHC-ATLAS. Measurements of the inclusive and differential fiducial cross-sections for $t\bar{t}+Z$ production in proton-proton collisions at a centre-of-mass energy of 13 TeV with 139 fb−1 of data collected between 2015 and 2018. 

The fiducial regions for the trilepton channel are defined as:
- Exactly 3 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 20 GeV for leading, subleading and third lepton, respectively.
- The sum of the three lepton charges is required to be $\pm$1.
- At least one opposite-sign-same-flavour (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Two orthogonal regions combined for inclusive measurement, different region for differential measurement.
- $b$-jets requirements: pseudo-continuous $b$-tagging with different working points for inclusive measurement, fixed 85% $b$-tagging working point for differential measurement. 
- At least 3 (inclusive and differential region) or 4 (inclusive region) jets

The fiducial regions for the tetralepton channel are defined as:
- Exactly 4 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 10, 7 GeV for leading, subleading, third and fourth lepton, respectively.
- The sum of the four lepton charges is required to be zero.
- At least one opposite-sign-same-flavor (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Four regions separated based on $b$-jets multiplicity (1$b$ or 2$b$ jets at 85% $b$-tagging working point) and flavour composition of the non-$Z$ lepton pair (same flavour, different flavour).
- At least 2 jets.
- $E_{T}^{miss}$ requirements (depending on the region) for suppresion of $ZZ$+jets background.
DOI: 10.17182/hepdata.100351.v2/t65
title: "Table 65" of "Measurements of the inclusive and differential production cross sections of a top-quark-antiquark pair in association with a $Z$ boson at $\sqrt{s} = 13$ TeV with the ATLAS detector"

description: The total correlation matrix of the absolute particle-level differential cross-section measured in the fiducial phase-space as a function of the $p_{\textrm{T}}^{t\bar{t}}$ in the 4$\ell$ channel.
description: CERN-LHC-ATLAS. Measurements of the inclusive and differential fiducial cross-sections for $t\bar{t}+Z$ production in proton-proton collisions at a centre-of-mass energy of 13 TeV with 139 fb−1 of data collected between 2015 and 2018. 

The fiducial regions for the trilepton channel are defined as:
- Exactly 3 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 20 GeV for leading, subleading and third lepton, respectively.
- The sum of the three lepton charges is required to be $\pm$1.
- At least one opposite-sign-same-flavour (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Two orthogonal regions combined for inclusive measurement, different region for differential measurement.
- $b$-jets requirements: pseudo-continuous $b$-tagging with different working points for inclusive measurement, fixed 85% $b$-tagging working point for differential measurement. 
- At least 3 (inclusive and differential region) or 4 (inclusive region) jets

The fiducial regions for the tetralepton channel are defined as:
- Exactly 4 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 10, 7 GeV for leading, subleading, third and fourth lepton, respectively.
- The sum of the four lepton charges is required to be zero.
- At least one opposite-sign-same-flavor (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Four regions separated based on $b$-jets multiplicity (1$b$ or 2$b$ jets at 85% $b$-tagging working point) and flavour composition of the non-$Z$ lepton pair (same flavour, different flavour).
- At least 2 jets.
- $E_{T}^{miss}$ requirements (depending on the region) for suppresion of $ZZ$+jets background.
DOI: 10.17182/hepdata.100351.v2/t66
title: "Table 66" of "Measurements of the inclusive and differential production cross sections of a top-quark-antiquark pair in association with a $Z$ boson at $\sqrt{s} = 13$ TeV with the ATLAS detector"

description: The total correlation matrix of the absolute particle-level differential cross-section measured in the fiducial phase-space as a function of the number of jets in the 4$\ell$ channel.
description: CERN-LHC-ATLAS. Measurements of the inclusive and differential fiducial cross-sections for $t\bar{t}+Z$ production in proton-proton collisions at a centre-of-mass energy of 13 TeV with 139 fb−1 of data collected between 2015 and 2018. 

The fiducial regions for the trilepton channel are defined as:
- Exactly 3 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 20 GeV for leading, subleading and third lepton, respectively.
- The sum of the three lepton charges is required to be $\pm$1.
- At least one opposite-sign-same-flavour (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Two orthogonal regions combined for inclusive measurement, different region for differential measurement.
- $b$-jets requirements: pseudo-continuous $b$-tagging with different working points for inclusive measurement, fixed 85% $b$-tagging working point for differential measurement. 
- At least 3 (inclusive and differential region) or 4 (inclusive region) jets

The fiducial regions for the tetralepton channel are defined as:
- Exactly 4 leptons ($e$ or $\mu$) with transverse momentum greater than 27, 20, 10, 7 GeV for leading, subleading, third and fourth lepton, respectively.
- The sum of the four lepton charges is required to be zero.
- At least one opposite-sign-same-flavor (OSSF) lepton pair (considered to be lepton pair from $Z$ boson) with invaraint mass compatible with $Z$ boson ($|m_{\ell\ell}^{Z}-m_{Z}|&lt;10$ GeV) and $m_{OSSF}&gt;10$ GeV for each OSSF lepton pair.
- Four regions separated based on $b$-jets multiplicity (1$b$ or 2$b$ jets at 85% $b$-tagging working point) and flavour composition of the non-$Z$ lepton pair (same flavour, different flavour).
- At least 2 jets.
- $E_{T}^{miss}$ requirements (depending on the region) for suppresion of $ZZ$+jets background.