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Measurement of the four-lepton invariant mass spectrum in 13 TeV proton-proton collisions with the ATLAS detector

The collaboration
No Journal Information, 2019

Abstract (data abstract)
CERN-LHC. A measurement of the four-lepton invariant mass spectrum is made with the ATLAS detector, using an integrated luminosity of 36.1 fb$^{-1}$ of proton-proton collisions at $\sqrt{s}$=13 TeV delivered by the Large Hadron Collider. The differential cross section is measured for events containing two same-flavour opposite-sign lepton pairs, and is corrected for detector effects. It exhibits a rich structure, with different mass regions dominated in the Standard Model by single Z production, Higgs production, and Z boson pair production, and non-negligible interference effects at high invariant masses. In addition, there may be contributions from beyond-the-Standard Model (BSM) physics. The measurement is compared to state-of-the-art Standard Model calculations, which are found to be consistent with the data. These calculations are used to interpret the data in terms of $gg\to ZZ \to 4\ell$ and $Z \rightarrow 4\ell$ subprocesses, and to place constraints on a possible BSM contribution.

• #### Table 1

Data from F10

10.17182/hepdata.84818.v1/t1

Measured and expected differential cross-section $\text{d}\sigma / \text{d} m_{4l}$ as a function of $m_{4l}$

• #### Table 2

Data from F11

10.17182/hepdata.84818.v1/t2

Measured and expected differential cross-section $\text{d}\sigma / \text{d} m_{4l}$ as a function of $m_{4l}$ in bin of 0$< p_{T}^{4l} <$20...

• #### Table 3

Data from F11

10.17182/hepdata.84818.v1/t3

Measured and expected differential cross-section $\text{d}\sigma / \text{d} m_{4l}$ as a function of $m_{4l}$ in bin of 20$< p_{T}^{4l} <$50...

• #### Table 4

Data from F11

10.17182/hepdata.84818.v1/t4

Measured and expected differential cross-section $\text{d}\sigma / \text{d} m_{4l}$ as a function of $m_{4l}$ in bin of 50$< p_{T}^{4l} <$100...

• #### Table 5

Data from F11

10.17182/hepdata.84818.v1/t5

Measured and expected differential cross-section $\text{d}\sigma / \text{d} m_{4l}$ as a function of $m_{4l}$ in bin of 100$< p_{T}^{4l} <$600...

• #### Table 6

Data from F12

10.17182/hepdata.84818.v1/t6

• #### Table 8

Data from F12

10.17182/hepdata.84818.v1/t8

• #### Table 10

Data from F13

10.17182/hepdata.84818.v1/t10

Measured and expected double differential cross-section $\text{d}\sigma / \text{d} m_{4l}$ as a function of $m_{4l}$ for MELA$<$1.4 bin

• #### Table 11

Data from F13

10.17182/hepdata.84818.v1/t11

Measured and expected double differential cross-section $\text{d}\sigma / \text{d} m_{4l}$ as a function of $m_{4l}$ for MELA$>$1.4 bin

• #### Table 12

Data from F14

10.17182/hepdata.84818.v1/t12

Measured and expected double differential cross-section $\text{d}\sigma / \text{d} m_{4l}$ as a function of $m_{4l}$ for $\mu\mu\mu\mu$ events

• #### Table 13

Data from F14

10.17182/hepdata.84818.v1/t13

Measured and expected double differential cross-section $\text{d}\sigma / \text{d} m_{4l}$ as a function of $m_{4l}$ for $eeee$ events

• #### Table 14

Data from F14

10.17182/hepdata.84818.v1/t14

Measured and expected double differential cross-section $\text{d}\sigma / \text{d} m_{4l}$ as a function of $m_{4l}$ for $ee\mu\mu$ events

• #### Table 15

Data from AUX

10.17182/hepdata.84818.v1/t15

Systematic covariance matrix for the differential $m_{4l}$ distribution.

• #### Table 16

Data from AUX

10.17182/hepdata.84818.v1/t16

Statistical covariance matrix for the differential $m_{4l}$ distribution.

• #### Table 17

Data from AUX

10.17182/hepdata.84818.v1/t17

Background covariance matrix for the differential $m_{4l}$ distribution.

• #### Table 18

Data from AUX

10.17182/hepdata.84818.v1/t18

Systematic covariance matrix for the differential $m_{4l}$-$p_{T}^{4l}$ distribution.<br><br> Bins labelled 1-9 correspond to the 0$< p_{T}^{4l} <$20 GeV bin...

• #### Table 19

Data from AUX

10.17182/hepdata.84818.v1/t19

Statistical covariance matrix for the differential $m_{4l}$-$p_{T}^{4l}$ distribution. <br><br> Bins labelled 1-9 correspond to the 0$< p_{T}^{4l} <$20 GeV...

• #### Table 20

Data from AUX

10.17182/hepdata.84818.v1/t20

Background covariance matrix for the differential $m_{4l}$-$p_{T}^{4l}$ distribution. <br><br> Bins labelled 1-9 correspond to the 0$< p_{T}^{4l} <$20 GeV...

• #### Table 21

Data from AUX

10.17182/hepdata.84818.v1/t21

Systematic covariance matrix for the differential $m_{4l}$-$y_{4l}$ distribution. <br><br> Bins labelled 1-9 correspond to the 0.0$< y_{4l} <$0.4 bin...

• #### Table 22

Data from AUX

10.17182/hepdata.84818.v1/t22

Statistical covariance matrix for the differential $m_{4l}$-$y_{4l}$ distribution. <br><br> Bins labelled 1-9 correspond to the 0.0$< y_{4l} <$0.4 bin...

• #### Table 23

Data from AUX

10.17182/hepdata.84818.v1/t23

Background covariance matrix for the differential $m_{4l}$-$y_{4l}$ distribution. <br><br> Bins labelled 1-9 correspond to the 0.0$< y_{4l} <$0.4 bin...

• #### Table 24

Data from AUX

10.17182/hepdata.84818.v1/t24

Systematic covariance matrix for the differential $m_{4l}$-MELA distribution. <br><br> Bins labelled 1-7 correspond to the MELA$<$ 0.4 bin with $m_{4l}$...

• #### Table 25

Data from AUX

10.17182/hepdata.84818.v1/t25

Statistical covariance matrix for the differential $m_{4l}$-MELA distribution. <br><br> Bins labelled 1-7 correspond to the MELA$<$ 0.4 bin with $m_{4l}$...

• #### Table 26

Data from AUX

10.17182/hepdata.84818.v1/t26

Background covariance matrix for the differential $m_{4l}$-MELA distribution. <br><br> Bins labelled 1-7 correspond to the MELA$<$ 0.4 bin with $m_{4l}$...

• #### Table 27

Data from AUX

10.17182/hepdata.84818.v1/t27

Systematic covariance matrix for the differential $m_{4l}$-lepton flavour distribution. <br><br> Bins labelled 1-9 correspond to $\mu\mu\mu\mu$ events with $m_{4l}$ values...

• #### Table 28

Data from AUX

10.17182/hepdata.84818.v1/t28

Statistical covariance matrix for the differential $m_{4l}$-lepton flavour distribution. <br><br> Bins labelled 1-9 correspond to $\mu\mu\mu\mu$ events with $m_{4l}$ values...

• #### Table 29

Data from AUX

10.17182/hepdata.84818.v1/t29

Background covariance matrix for the differential $m_{4l}$-lepton flavour distribution. <br><br> Bins labelled 1-9 correspond to $\mu\mu\mu\mu$ events with $m_{4l}$ values...