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Search for new non-resonant phenomena in high-mass dilepton final states with the ATLAS detector

The collaboration
2020.

Abstract (data abstract)
CERN-LHC. Limits set on 2q2l contact interactions, and limits set on the visible cross section times branching ratio to two leptons, in proton-proton collisions at a centre-of-mass energy of 13 TeV with 139 fb$^{-1}$ of data collected by ATLAS. The final states used are 2 electrons, and 2 muons. This result uses the same dataset, with the same acceptance and efficiency, as the earlier search for high-mass dielectron and dimuon resonances: https://www.hepdata.net/record/88425. The ee-const fiducial region is defined as: - Two electrons, any charge - Electron $E_T>30$ GeV - Electron $|\eta|>1.37$ or $1.52<|\eta|<2.47$ - Highest $E_T$ electron pair selected - The electron pair's invariant mass $2200<m_{ee}<6000$ GeV The ee-dest fiducial region is defined as: - Two electrons, any charge - Electron $E_T>30$ GeV - Electron $|\eta|>1.37$ or $1.52<|\eta|<2.47$ - Highest $E_T$ electron pair selected - The electron pair's invariant mass $2770<m_{ee}<6000$ GeV The mm-const fiducial region is defined as: - Not satisfying an electron fiducial region - Two muons, opposite charge - Muon $p_T>30$ GeV - Muon $|\eta|>2.5$ - Highest $p_T$ opposite charged muon pair selected - The muon pair's invariant mass $2070<m_{\mu\mu}<6000$ GeV The mm-dest fiducial region is defined as: - Not satisfying an electron fiducial region - Two muons, opposite charge - Muon $p_T>30$ GeV - Muon $|\eta|>2.5$ - Highest $p_T$ opposite charged muon pair selected - The muon pair's invariant mass $2570<m_{\mu\mu}<6000$ GeV

• #### Figure 2 (Signal Regions)

Data from Figure 2 of the paper

10.17182/hepdata.94786.v1/t1

Expected and observed event yields in each signal bin.

• #### Figure 3

Data from Figure 3 of the paper

10.17182/hepdata.94786.v1/t2

Model-independent upper limits at 95% CL on the number of signal events in the (constructive/destructive interference) SRs used in the...

• #### Figure 4 (a)

Data from Figure 4 (a) of the paper

10.17182/hepdata.94786.v1/t3

Lower limits at 95$\%$ CL on $\Lambda$ for the dielectron channel for different signal chiralities in the (constructive/destructive interference) SRs...

• #### Figure 4 (b)

Data from Figure 4 (b) of the paper

10.17182/hepdata.94786.v1/t4

Lower limits at 95$\%$ CL on $\Lambda$ for the dimuon channel for different signal chiralities in the (constructive/destructive interference) SRs...

• #### Figure 4 (c)

Data from Figure 4 (c) of the paper

10.17182/hepdata.94786.v1/t5

Lower limits at 95$\%$ CL on $\Lambda$ for the dilepton combination for different signal chiralities in the (constructive/destructive interference) SRs...

• #### Auxiliary Figure 5

Data from Figure 5 of the auxiliary material

10.17182/hepdata.94786.v1/t6

The dielectron data events passing the full selection.

• #### Auxiliary Figure 6

Data from Figure 6 of the auxiliary material

10.17182/hepdata.94786.v1/t7

The dimuon data events passing the full selection.