Search for dark matter in association with an energetic photon in pp collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector

The ATLAS collaboration
CERN-EP-2020-178, 2020.

Abstract (data abstract)
CERN-LHC, ATLAS. A search for dark matter is conducted in final states containing a photon and missing transverse momentum in proton-proton collisions at 13 TeV. The data, collected during 2015-2018 by the ATLAS experiment at the CERN LHC, correspond to an integrated luminosity of 139 fb$^{-1}$. No deviations are observed relative to the predictions of the Standard Model. The results are interpreted as exclusion limits in models where weakly interacting dark-matter candidates are pair-produced via an axial-vector or a vector mediator in the s-channel. Results are also expressed in terms of 95% confidence level limits on the parameters of a model with an axion-like particle produced in association with a photon.

  • Missign Transverse Momentum - SRs

    Data from Figure 4 (top left).

    10.17182/hepdata.96846.v1/t1

    Distribution of $E^{miss}_T$ in data and for the expected SM background in the SRs after performing the 'simplified shape fit'....

  • Missign Transverse Momentum - Single-Muon CR

    Data from Figure 4 (top right).

    10.17182/hepdata.96846.v1/t2

    Distribution of $E^{miss}_T$ in data and for the expected SM background in the Single-Muon CR after performing the 'simplified shape...

  • Missign Transverse Momentum - Two-Muon CR

    Data from Figure 4 (bottom left).

    10.17182/hepdata.96846.v1/t3

    Distribution of $E^{miss}_T$ in data and for the expected SM background in the Two-Muon CR after performing the 'simplified shape...

  • Missign Transverse Momentum - Two-Electron CR

    Data from Figure 4 (bottom right).

    10.17182/hepdata.96846.v1/t4

    Distribution of $E^{miss}_T$ in data and for the expected SM background in the Two-Electron CR after performing the 'simplified shape...

  • Observed exclusion for A1 model

    Data from Figure 5 (top left).

    10.17182/hepdata.96846.v1/t5

    The observed exclusion contours on the $m_{\chi} - m_{med}$ plane for a simplified DM model involving an axial-vector mediator with...

  • Expected exclusion A1 model

    Data from Figure 5 (top left).

    10.17182/hepdata.96846.v1/t6

    The expected exclusion contours on the $m_{\chi} - m_{med}$ plane for a simplified DM model involving an axial-vector mediator with...

  • Expected + 1 sigma exclusion for A1 model

    Data from Figure 5 (top left).

    10.17182/hepdata.96846.v1/t7

    The expected + 1 sigma exclusion contours on the $m_{\chi} - m_{med}$ plane for a simplified DM model involving an...

  • Expected - 1 sigma exclusion for A1 model

    Data from Figure 5 (top left).

    10.17182/hepdata.96846.v1/t8

    The expected - 1 sigma exclusion contours on the $m_{\chi} - m_{med}$ plane for a simplified DM model involving an...

  • Observed exclusion for A2 model

    Data from Figure 5 (top right).

    10.17182/hepdata.96846.v1/t9

    The observed exclusion contours on the $m_{\chi} - m_{med}$ plane for a simplified DM model involving an axial-vector mediator with...

  • Expected exclusion for A2 model

    Data from Figure 5 (top right).

    10.17182/hepdata.96846.v1/t10

    The expected exclusion contours on the $m_{\chi} - m_{med}$ plane for a simplified DM model involving an axial-vector mediator with...

  • Expected + 1 sigma exclusion A2 model

    Data from Figure 5 (top right).

    10.17182/hepdata.96846.v1/t11

    The expected + 1 sigma exclusion contours on the $m_{\chi} - m_{med}$ plane for a simplified DM model involving an...

  • Expected - 1 sigma exclusion for A2 model

    Data from Figure 5 (top right).

    10.17182/hepdata.96846.v1/t12

    The expected - 1 sigma exclusion contours on the $m_{\chi} - m_{med}$ plane for a simplified DM model involving an...

  • Observed exclusion contour for vector mediator, V1 model

    Data from Figure 5 (bottom left).

    10.17182/hepdata.96846.v1/t13

    The observed exclusion contours on the $m_{\chi} - m_{med}$ plane for a vector mediator with couplings $g_{\chi}$ = 1, $g_q$...

  • Expected exclusion for V1 model

    Data from Figure 5 (bottom left).

    10.17182/hepdata.96846.v1/t14

    The expected exclusion contours on the $m_{\chi} - m_{med}$ plane for a vector mediator with couplings $g_{\chi}$ = 1, $g_q$...

  • Expected + 1 sigma exclusion for V1 model

    Data from Figure 5 (bottom left).

    10.17182/hepdata.96846.v1/t15

    The expected + 1 sigma exclusion contours on the $m_{\chi} - m_{med}$ plane for a vector mediator with couplings $g_{\chi}$...

  • Expected - 1 sigma exclusion for V1 model

    Data from Figure 5 (bottom left).

    10.17182/hepdata.96846.v1/t16

    The expected - 1 sigma exclusion contours on the $m_{\chi} - m_{med}$ plane for a vector mediator with couplings $g_{\chi}$...

  • Observed exclusion for vector mediator, V2 model

    Data from Figure 5 (bottom right).

    10.17182/hepdata.96846.v1/t17

    The observed exclusion contours on the $m_{\chi} - m_{med}$ plane for a vector mediator with couplings and $g_{\chi}$ = 1,...

  • Expected exclusion for vector mediator, V2 model

    Data from Figure 5 (bottom right).

    10.17182/hepdata.96846.v1/t18

    The expected exclusion contours on the $m_{\chi} - m_{med}$ plane for a vector mediator with couplings $g_{\chi}$ = 1, $g_q$...

  • Expected + 1 sigma exclusion contour for V2 model

    Data from Figure 5 (bottom right).

    10.17182/hepdata.96846.v1/t19

    The expected + 1 sigma exclusion contours on the $m_{\chi} - m_{med}$ plane for a vector mediator with couplings $g_{\chi}$...

  • Expected - 1 sigma exclusion for V2 model

    Data from Figure 5 (bottom right).

    10.17182/hepdata.96846.v1/t20

    The expected - 1 sigma exclusion contours on the $m_{\chi} - m_{med}$ plane for a vector mediator with couplings $g_{\chi}$...

  • Exclusion on $\chi$-proton for A1 model.

    Data from Figure 6 (top left).

    10.17182/hepdata.96846.v1/t21

    The 90% CL exclusion limit on $\chi$-proton spin-dependent scattering cross section in an axial-vector model with couplings $g_{\chi}$ = 1,...

  • Exclusion on $\chi$-neutron for A1 model.

    Data from Figure 6 (top right).

    10.17182/hepdata.96846.v1/t22

    The 90% CL exclusion limit on $\chi$-neutron spin-dependent scattering cross section in an axial-vector model with couplings $g_{\chi}$ = 1,...

  • Exclusion on $\chi$-nucleon for V1 model, spin-independent.

    Data from Figure 6 (bottom).

    10.17182/hepdata.96846.v1/t23

    The 90% CL exclusion limit on $\chi$-nucleon spin-independent scattering cross section in a vector model with couplings $g_{\chi}$ = 1,...

  • ALPs observed and expected exclusion.

    Data from Figure 7.

    10.17182/hepdata.96846.v1/t24

    Observed and expected exclusion at 95% CL on the coupling $c_W$ as a function of the effective scale $f_a$ for...

  • Observed upper limits on signal strenght for A1 model.

    Data from Figure 1 (Auxiliary matterial).

    10.17182/hepdata.96846.v1/t25

    The observed 95% CL upper limits on signal strength $\mu$, the ratio of the experimental limit to the predicted signal...

  • Observed upper limits on cross section for A1 model.

    Data from Figure 2 (Auxiliary matterial).

    10.17182/hepdata.96846.v1/t26

    The observed 95% CL upper limits on cross section for a simplified model of dark matter production involving an axial-vector...

  • Acceptance for A1 model in inclusive SRs

    Data from Table 2 (Auxiliary matterial).

    10.17182/hepdata.96846.v1/t27

    Acceptance in % for a simplified model of dark matter production involving an axial-vector operator with couplings $g_{\chi}$ = 1,...

  • Acceptance for A1 model in exclusive SR.

    Data from Table 3 (Auxiliary matterial).

    10.17182/hepdata.96846.v1/t28

    Acceptance in % for a simplified model of dark matter production involving an axial-vector operator with couplings $g_{\chi}$ = 1,...

  • Efficiencies for A1 model in inclusive SRs

    Data from Table 4 (Auxiliary matterial).

    10.17182/hepdata.96846.v1/t29

    Efficiencies for a simplified model of dark matter production involving an axial-vector operator with couplings $g_{\chi}$ = 1, $g_q$ =...

  • Efficiencies for A1 model in exclusive SRs.

    Data from Table 5 (Auxiliary matterial).

    10.17182/hepdata.96846.v1/t30

    Efficiencies for a simplified model of dark matter production involving an axial-vector operator with couplings $g_{\chi}$ = 1, $g_q$ =...

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