Search for high-mass dilepton resonances using 139 fb$^{-1}$ of $pp$ collision data collected at $\sqrt{s}=$13 TeV with the ATLAS detector

The ATLAS collaboration
Phys.Lett. B796 (2019) 68-87, 2019

Abstract (data abstract)
A search for high-mass dielectron and dimuon resonances in the mass range of 250 GeV to 6 TeV is presented. The data were recorded by the ATLAS experiment in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}$=13 TeV during Run 2 of the Large Hadron Collider and correspond to an integrated luminosity of 139 fb$^{-1}$. Limits are set on the fiducial cross-section times branching ratio to dielectrons and dimuons for generic resonances with a relative natural width in the range of zero to 10%. Limits on the Heavy Vector Triplet model couplings and on the masses of vector resonances are inferred.

  • Dielectron invariant mass spectrum

    Data from figure 1a

    10.17182/hepdata.88425.v3/t1

    Distribution of the dielectron invariant mass for events passing the full selection.

  • Dimuon invariant mass spectrum

    Data from figure 1b

    10.17182/hepdata.88425.v3/t2

    Distribution of the dimuon invariant mass for events passing the full selection.

  • Expected dilepton cross-section limits

    Data from figure 3

    10.17182/hepdata.88425.v3/t3

    Expected upper limits at 95% CL on the fiducial cross-section times branching ratio as a function of pole mass for...

  • Observed dilepton cross-section limits

    Data from figure 3

    10.17182/hepdata.88425.v3/t4

    Observed upper limits at 95% CL on the fiducial cross-section times branching ratio as a function of pole mass for...

  • Expected dielectron cross-section limits

    Data from auxiliary figures 3a and 4a

    10.17182/hepdata.88425.v3/t5

    Expected upper limits at 95% CL on the fiducial cross-section times branching ratio as a function of pole mass for...

  • Observed dielectron cross-section limits

    Data from auxiliary figures 3a and 4a

    10.17182/hepdata.88425.v3/t6

    Observed upper limits at 95% CL on the fiducial cross-section times branching ratio as a function of pole mass for...

  • Expected dimuon cross-section limits

    Data from auxiliary figures 3b and 4b

    10.17182/hepdata.88425.v3/t7

    Expected upper limits at 95% CL on the fiducial cross-section times branching ratio as a function of pole mass for...

  • Observed dimuon cross-section limits

    Data from auxiliary figures 3b and figure 4b

    10.17182/hepdata.88425.v3/t8

    Observed upper limits at 95% CL on the fiducial cross-section times branching ratio as a function of pole mass for...

  • Ratio of observed limits to SSM cross section

    Data from auxiliary figure 7

    10.17182/hepdata.88425.v3/t9

    Ratio of the observed limit to the Z'$_\mathrm{SSM}$ cross-section for the combination of the dielectron and dimuon channels. A number...

  • Observed exclusion contours on HVT $\{g_h,g_f\}$ at 3 TeV

    Data from figure 4a

    10.17182/hepdata.88425.v3/t10

    Observed 95% exclusion contours in the HVT parameter space $\{g_h,g_f\}$ with $g_f\equiv g_l=g_q$ for a resonance mass of 3 TeV...

  • Observed exclusion contours on HVT $\{g_h,g_f\}$ at 4 TeV

    Data from figure 4a

    10.17182/hepdata.88425.v3/t11

    Observed 95% exclusion contours in the HVT parameter space $\{g_h,g_f\}$ with $g_f\equiv g_l=g_q$ for a resonance mass of 4 TeV...

  • Observed exclusion contours on HVT $\{g_h,g_f\}$ at 5 TeV

    Data from figure 4a

    10.17182/hepdata.88425.v3/t12

    Observed 95% exclusion contours in the HVT parameter space $\{g_h,g_f\}$ with $g_f\equiv g_l=g_q$ for a resonance mass of 5 TeV...

  • Observed exclusion contours on HVT $\{g_q,g_l\}$ at 3 TeV

    Data from figure 4b

    10.17182/hepdata.88425.v3/t13

    Observed 95% exclusion contours in the HVT parameter space $\{g_q,g_l\}$ with $g_h$ set to zero for a resonance mass of...

  • Observed exclusion contours on HVT $\{g_q,g_l\}$ at 4 TeV

    Data from figure 4b

    10.17182/hepdata.88425.v3/t14

    Observed 95% exclusion contours in the HVT parameter space $\{g_q,g_l\}$ with $g_h$ set to zero for a resonance mass of...

  • Observed exclusion contours on HVT $\{g_q,g_l\}$ at 5 TeV

    Data from figure 4b

    10.17182/hepdata.88425.v3/t15

    Observed 95% exclusion contours in the HVT parameter space $\{g_q,g_l\}$ with $g_h$ set to zero for a resonance mass of...

  • Expected exclusion contours on HVT $\{g_h,g_f\}$ at 3 TeV

    Data from auxiliary figure 14a

    10.17182/hepdata.88425.v3/t16

    Expected 95% exclusion contours in the HVT parameter space $\{g_h,g_f\}$ with $g_f\equiv g_l=g_q$ for a resonance mass of 3 TeV...

  • Expected exclusion contours on HVT $\{g_h,g_f\}$ at 4 TeV

    Data from auxiliary figure 14a

    10.17182/hepdata.88425.v3/t17

    Expected 95% exclusion contours in the HVT parameter space $\{g_h,g_f\}$ with $g_f\equiv g_l=g_q$ for a resonance mass of 4 TeV...

  • Expected exclusion contours on HVT $\{g_h,g_f\}$ at 5 TeV

    Data from auxiliary figure 14a

    10.17182/hepdata.88425.v3/t18

    Expected 95% exclusion contours in the HVT parameter space $\{g_h,g_f\}$ with $g_f\equiv g_l=g_q$ for a resonance mass of 5 TeV...

  • Expected exclusion contours on HVT $\{g_q,g_l\}$ at 3 TeV

    Data from auxiliary figure 14b

    10.17182/hepdata.88425.v3/t19

    Expected 95% exclusion contours in the HVT parameter space $\{g_q,g_l\}$ with $g_h$ set to zero for a resonance masses of...

  • Expected exclusion contours on HVT $\{g_q,g_l\}$ at 4 TeV

    Data from auxiliary figure 14b

    10.17182/hepdata.88425.v3/t20

    Expected 95% exclusion contours in the HVT parameter space $\{g_q,g_l\}$ with $g_h$ set to zero for a resonance masses of...

  • Expected exclusion contours on HVT $\{g_q,g_l\}$ at 5 TeV

    Data from auxiliary figure 14b

    10.17182/hepdata.88425.v3/t21

    Expected 95% exclusion contours in the HVT parameter space $\{g_q,g_l\}$ with $g_h$ set to zero for a resonance masses of...

  • Selection efficiency for spin-0, spin-1 and spin-2 resonances

    Data from auxiliary figure 16

    10.17182/hepdata.88425.v3/t22

    Dielectron and dimuon selection efficiency as a function of pole mass for spin-0, spin-1 and spin-2 resonances. Drell-Yan MC samples...

  • Relative dielectron mass resolution parameters

    Data from auxiliary figure 10

    10.17182/hepdata.88425.v3/t23

    Description of the $m_{\ell\ell}^{\mathrm{true}}$-dependence for the seven relative mass resolution parameters in the dielectron channel.

  • Relative dimuon mass resolution parameters

    Data from auxiliary figure 11

    10.17182/hepdata.88425.v3/t24

    Description of the $m_{\ell\ell}^{\mathrm{true}}$-dependence for the seven relative mass resolution parameters in the dimuon channel.

Version 3 modifications: Added two resource files containing pseudo-code with the parametrizations for the mass resolution and background functions.

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