Search for light long-lived neutral particles produced in $pp$ collisions at $\sqrt{s} =$ 13 TeV and decaying into collimated leptons or light hadrons with the ATLAS detector

The ATLAS collaboration
No Journal Information, 2019

Abstract (data abstract)
CERN-LHC. Search for long-lived dark photons produced from the decay of a Higgs boson or a heavy scalar boson and decaying into displaced collimated Standard Model fermions. The search uses data corresponding to an integrated luminosity of 36.1/fb collected in proton-proton collisions at 13 TeV center-of-mass energy and recorded in 2015-2016 with the ATLAS detector at the Large Hadron Collider. The observed number of events is consistent with the expected background, and limits on the production cross section times branching fraction as a function of the proper decay length of the dark photon are reported. Detection efficiency as a function of the proper decay lenght are also reported.

  • Table 1

    Data from Figure 5a

    10.17182/hepdata.91132.v1/t1

    Upper limits at 95% CL on the cross section times branching fraction for the process $H \to 2\gamma_d + X$...

  • Table 2

    Data from Figure 5b

    10.17182/hepdata.91132.v1/t2

    Upper limits at 95% CL on the cross section times branching fraction for the process $H \to 4\gamma_d + X$...

  • Table 3

    Data from Figure 6a

    10.17182/hepdata.91132.v1/t3

    Upper limits at 95% CL on the cross section times branching fraction for the process $H \to 2\gamma_d + X$...

  • Table 4

    Data from Figure 6b

    10.17182/hepdata.91132.v1/t4

    Upper limits at 95% CL on the cross section times branching fraction for the process $H \to 2\gamma_d + X$...

  • Table 5

    Data from Figure 9 of auxiliary material

    10.17182/hepdata.91132.v1/t5

    Upper limits at 95% CL on the cross section times branching fraction for the process $H \to 2\gamma_d + X$...

  • Table 6

    Data from Figure 10a of auxiliary material

    10.17182/hepdata.91132.v1/t6

    Upper limits at 95% CL on the cross section times branching fraction for the process $H \to 4\gamma_d + X$...

  • Table 7

    Data from Figure 10b of auxiliary material

    10.17182/hepdata.91132.v1/t7

    Upper limits at 95% CL on the cross section times branching fraction for the process $H \to 4\gamma_d + X$...

  • Table 8

    Data from Figure 10c of auxiliary material

    10.17182/hepdata.91132.v1/t8

    Upper limits at 95% CL on the cross section times branching fraction for the process $H \to 4\gamma_d + X$...

  • Table 9

    Data from Figure 4a

    10.17182/hepdata.91132.v1/t9

    Extrapolated signal efficiencies as a function of proper decay length of the dark photon for the $H \to 4\gamma_d +...

  • Table 10

    Data from Figure 4a

    10.17182/hepdata.91132.v1/t10

    Extrapolated signal efficiencies as a function of proper decay length of the dark photon for the $H \to 2\gamma_d +...

  • Table 11

    Data from Figure 4a

    10.17182/hepdata.91132.v1/t11

    Extrapolated signal efficiencies as a function of proper decay length of the dark photon for the $H \to 2\gamma_d +...

  • Table 12

    Data from Figure 4a

    10.17182/hepdata.91132.v1/t12

    Extrapolated signal efficiencies as a function of proper decay length of the dark photon for the $H \to 4\gamma_d +...

  • Table 13

    Data from Figure 4b

    10.17182/hepdata.91132.v1/t13

    Extrapolated signal efficiencies as a function of proper decay length of the dark photon for the $H \to 4\gamma_d +...

  • Table 14

    Data from Figure 4b

    10.17182/hepdata.91132.v1/t14

    Extrapolated signal efficiencies as a function of proper decay length of the dark photon for the $H \to 2\gamma_d +...

  • Table 15

    Data from Figure 4b

    10.17182/hepdata.91132.v1/t15

    Extrapolated signal efficiencies as a function of proper decay length of the dark photon for the $H \to 2\gamma_d +...

  • Table 16

    Data from Figure 4b

    10.17182/hepdata.91132.v1/t16

    Extrapolated signal efficiencies as a function of proper decay length of the dark photon for the $H \to 4\gamma_d +...

  • Table 17

    Data from Figure 4c

    10.17182/hepdata.91132.v1/t17

    Extrapolated signal efficiencies as a function of proper decay length of the dark photon for the $H \to 2\gamma_d +...

  • Table 18

    Data from Figure 4c

    10.17182/hepdata.91132.v1/t18

    Extrapolated signal efficiencies as a function of proper decay length of the dark photon for the $H \to 2\gamma_d +...

  • Table 19

    Data from Figure 4c

    10.17182/hepdata.91132.v1/t19

    Extrapolated signal efficiencies as a function of proper decay length of the dark photon for the $H \to 4\gamma_d +...

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