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Measurements of the production cross-section for a $Z$ boson in association with $b$-jets in proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector

The collaboration
JHEP 07 (2020) 044, 2020.

Abstract (data abstract)
This paper presents the first measurement of the production cross-section of a $Z$ boson in association with $b$-jets, in proton-proton collisions at $\sqrt{s}$​ = 13 TeV. The measurement has been completed at the ATLAS experiment at the Large Hadron Collider using data corresponding to an integrated luminosity of 35.6 fb$^{−1}$. Inclusive and differential cross-sections are measured for events containing a $Z$ boson decaying into electrons or muons and produced in association with at least one or at least two b-jets with transverse momentum $p_{\text{T}}​>$ 20 GeV and rapidity $|y| <$2.5. Fiducial region definition commont to all measured cross-sections: - 2 electrons or 2 muons of opposite charge, $p_{\text{T}}>$27 GeV, $|\eta|<2.5$, $76<M_{\ell\ell}<106$ GeV - At least one jet, reconstructed using anti-kT of R=0.4, of $p_{\text{T}}>20$ GeV, |y|<2.5, $\Delta$ $R(jet, lepton)>0.4$ - b-jets defined as jets containing at least one b-hadron of $p_{\text{T}}>5$ GeV within $\Delta$ $R(jet, b-hadron)>0.3$

• Table 1

Figure 7 of the article

10.17182/hepdata.94219.v1/t1

Measured fiducial cross sections for events with $Z(\rightarrow ll)\ge+1$ b-jets or with $Z(\rightarrow ll)\ge+2$ b-jets. The statistical uncertainties and the...

• Table 2

Figure 8 (left) of the article

10.17182/hepdata.94219.v1/t2

Differential fiducial cross section of the Z boson $p_{\text{T}}$ in events with $Z(\rightarrow ll)\ge+1$ b-jets. The statistical uncertainties and the...

• Table 3

Figure 8 (right) of the article

10.17182/hepdata.94219.v1/t3

Differential fiducial cross section of the leading b-jet $p_{\text{T}}$ in events with $Z(\rightarrow ll)\ge+1$ b-jets. The statistical uncertainties and the...

• Table 4

Figure 9 (left) of the article

10.17182/hepdata.94219.v1/t4

Differential fiducial cross section of the Z boson $|y|$ in events with $Z(\rightarrow ll)\ge+1$ b-jets. The statistical uncertainties and the...

• Table 5

Figure 9 (right) of the article

10.17182/hepdata.94219.v1/t5

Differential fiducial cross section of the leading b-jet $|y|$ in events with $Z(\rightarrow ll)\ge+1$ b-jets. The statistical uncertainties and the...

• Table 6

Figure 10 (left) of the article

10.17182/hepdata.94219.v1/t6

Differential fiducial cross section of the $\Delta \phi$ between Z boson and leading $b$-jet in events with $Z(\rightarrow ll)\ge+1$ b-jets....

• Table 7

Figure 10 (right) of the article

10.17182/hepdata.94219.v1/t7

Differential fiducial cross section of the $\Delta y$ between Z boson and leading $b$-jet in events with $Z(\rightarrow ll)\ge+1$ b-jets....

• Table 8

Figure 11 of the article

10.17182/hepdata.94219.v1/t8

Differential fiducial cross section of the $\Delta R$ between Z boson and leading $b$-jet in events with $Z(\rightarrow ll)\ge+1$ b-jets....

• Table 9

Figure 12 (left) of the article

10.17182/hepdata.94219.v1/t9

Differential fiducial cross section of the $\Delta \phi$ between the first two leading $b$-jets in events with $Z(\rightarrow ll)\ge+2$ b-jets....

• Table 10

Figure 12 (right) of the article

10.17182/hepdata.94219.v1/t10

Differential fiducial cross section of the $\Delta y$ between the first two leading $b$-jets in events with $Z(\rightarrow ll)\ge+2$ b-jets....

• Table 11

Figure 13 (left) of the article

10.17182/hepdata.94219.v1/t11

Differential fiducial cross section of the $\Delta R$ between the first two leading $b$-jets in events with $Z(\rightarrow ll)\ge+2$ b-jets....

• Table 12

Figure 13 (right) of the article

10.17182/hepdata.94219.v1/t12

Differential fiducial cross section of the invariant mass of the first two leading $b$-jets in events with $Z(\rightarrow ll)\ge+2$ b-jets....

• Table 13

Figure 14 (left) of the article

10.17182/hepdata.94219.v1/t13

Differential fiducial cross section of the Z boson $p_{\text{T}}$ in events with $Z(\rightarrow ll)\ge+2$ b-jets. The statistical uncertainties and the...

• Table 14

Figure 14 (right) of the article

10.17182/hepdata.94219.v1/t14

Differential fiducial cross section of the $p_{\text{T}}$ of the first two leading $b$-jets in events with $Z(\rightarrow ll)\ge+2$ b-jets. The...

• Table 15

Figure 15 of the article

10.17182/hepdata.94219.v1/t15

Differential fiducial cross section of the ratio between the $p_{\text{T}}$ and the invariant mass of the first two leading $b$-jets...