• Browse all
Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in pp collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector

The ATLAS collaboration
Phys.Rev. D92 (2015) 072004, 2015

Abstract (data abstract)
CERN-LHC. Many extensions of the Standard Model posit the existence of heavy particles with long lifetimes. This article presents the results of a search for events containing at least one long-lived particle that decays at a significant distance from its production point into two leptons or into five or more charged particles. This analysis uses a data sample of proton-proton collisions at $\sqrt{s}$ = 8 TeV corresponding to an integrated luminosity of 20.3 fb$^{-1}$ collected in 2012 by the ATLAS detector operating at the Large Hadron Collider. No events are observed in any of the signal regions, and limits are set on model parameters within supersymmetric scenarios involving R-parity violation, split supersymmetry, and gauge mediation. In some of the search channels, the trigger and search strategy are based only on the decay products of individual long-lived particles, irrespective of the rest of the event. In these cases, the provided limits can easily be reinterpreted in different scenarios.

  • Table 1

    Data from Figure 3a

    10.17182/hepdata.68777.v1/t1

    Vertex-level efficiency as a function of the vertex radial position for an RPV SUSY model of squark production with $\tilde{q}\to...

  • Table 2

    Data from Figure 3a

    10.17182/hepdata.68777.v1/t2

    Vertex-level efficiency as a function of the vertex radial position for an RPV SUSY model of squark production with $\tilde{q}\to...

  • Table 3

    Data from Figure 3b

    10.17182/hepdata.68777.v1/t3

    Vertex-level efficiency as a function of the vertex radial position for an RPV SUSY model of squark production with $\tilde{q}\to...

  • Table 4

    Data from Auxiliary Figure 1

    10.17182/hepdata.68777.v1/t4

    Vertex-level efficiency if no re-tracking is performed, as a function of the vertex radial position for an RPV SUSY model...

  • Table 5

    Data from Figure 12a

    10.17182/hepdata.68777.v1/t5

    Upper limits (95% CL) on the number of DV+muon displaced vertices in 20.3 fb$^{-1}$ and the corresponding vertex-level efficiencies (from...

  • Table 6

    Data from Figure 12b

    10.17182/hepdata.68777.v1/t6

    Upper limits (95% CL) on the number of DV+muon displaced vertices in 20.3 fb$^{-1}$ and the corresponding vertex-level efficiencies (from...

  • Table 7

    Data from Figure 12c

    10.17182/hepdata.68777.v1/t7

    Upper limits (95% CL) on the number of DV+electron displaced vertices in 20.3 fb$^{-1}$ and the corresponding vertex-level efficiencies (from...

  • Table 8

    Data from Figure 12d

    10.17182/hepdata.68777.v1/t8

    Upper limits (95% CL) on the number of DV+electron displaced vertices in 20.3 fb$^{-1}$ and the corresponding vertex-level efficiencies (from...

  • Table 9

    Data from Figure 13a

    10.17182/hepdata.68777.v1/t9

    Upper limits (95% CL) on the number of dilepton $e^+e^-$ displaced vertices in 20.3 fb$^{-1}$ and the corresponding vertex-level efficiencies...

  • Table 10

    Data from Figure 13b

    10.17182/hepdata.68777.v1/t10

    Upper limits (95% CL) on the number of dilepton $e^{\pm}\mu^{\mp}$ displaced vertices in 20.3 fb$^{-1}$ and the corresponding vertex-level efficiencies...

  • Table 11

    Data from Figure 13c

    10.17182/hepdata.68777.v1/t11

    Upper limits (95% CL) on the number of $\mu^+\mu^-$ displaced vertices in 20.3 fb$^{-1}$ and the corresponding vertex-level efficiencies (from...

  • Table 12

    Data from Figure 13d

    10.17182/hepdata.68777.v1/t12

    Upper limits (95% CL) on the number of dilepton ($e^+e^-+e^{\pm}\mu^{\mp}+\mu^+\mu^-$) displaced vertices in 20.3 fb$^{-1}$ and the corresponding vertex-level efficiencies...

  • Table 13

    Data from Figure 13d

    10.17182/hepdata.68777.v1/t13

    Upper limits (95% CL) on the number of dilepton ($e^+e^-+e^{\pm}\mu^{\mp}+\mu^+\mu^-$) displaced vertices in 20.3 fb$^{-1}$ and the corresponding vertex-level efficiencies...

  • Table 14

    Data from Figure 14a

    10.17182/hepdata.68777.v1/t14

    Upper limits (95% CL) from the dilepton $e^+e^-+e^{\pm}\mu^{\mp}$ channels on the production cross-section and the corresponding event-level efficiencies (from Auxiliary...

  • Table 15

    Data from Figure 14b

    10.17182/hepdata.68777.v1/t15

    Upper limits (95% CL) from the dilepton $e^{\pm}\mu^{\mp}+\mu^+\mu^-$ channels on the production cross-section and the corresponding event-level efficiencies (from Auxiliary...

  • Table 16

    Data from Figure 15

    10.17182/hepdata.68777.v1/t16

    Upper limits (95% CL) from the dilepton $e^+e^-+e^{\pm}\mu^{\mp}+\mu^+\mu^-$ channels on the production cross-section and the corresponding event-level efficiencies (from Auxiliary...

  • Table 17

    Data from Figure 15

    10.17182/hepdata.68777.v1/t17

    Upper limits (95% CL) from the dilepton $e^+e^-+e^{\pm}\mu^{\mp}+\mu^+\mu^-$ channels on the production cross-section and the corresponding event-level efficiencies (from Auxiliary...

  • Table 18

    Data from Figure 16a

    10.17182/hepdata.68777.v1/t18

    Upper limits (95% CL) from the DV+jets channel on the production cross-section and the corresponding event-level efficiencies (from Auxiliary Figure...

  • Table 19

    Data from Figure 16b

    10.17182/hepdata.68777.v1/t19

    Upper limits (95% CL) from the DV+jets channel on the production cross-section and the corresponding event-level efficiencies (from Auxiliary Figure...

  • Table 20

    Data from Figure 17a

    10.17182/hepdata.68777.v1/t20

    Upper limits (95% CL) from the DV+$E_T^{miss}$ channel on the production cross-section and the corresponding event-level efficiencies (from Auxiliary Figure...

  • Table 21

    Data from Figure 17b

    10.17182/hepdata.68777.v1/t21

    Upper limits (95% CL) from the DV+jets channel on the production cross-section and the corresponding event-level efficiencies (from Auxiliary Figure...

  • Table 22

    Data from Figure 18a

    10.17182/hepdata.68777.v1/t22

    Upper limits (95% CL) from the DV+$E_T^{miss}$ channel on the production cross-section and the corresponding event-level efficiencies (from Auxiliary Figure...

  • Table 23

    Data from Figure 18b

    10.17182/hepdata.68777.v1/t23

    Upper limits (95% CL) from the DV+jets channel on the production cross-section and the corresponding event-level efficiencies (from Auxiliary Figure...

  • Table 24

    Data from Figure 18c

    10.17182/hepdata.68777.v1/t24

    Upper limits (95% CL) from the DV+$E_T^{miss}$ channel on the production cross-section and the corresponding event-level efficiencies (from Auxiliary Figure...

  • Table 25

    Data from Figure 18d

    10.17182/hepdata.68777.v1/t25

    Upper limits (95% CL) from the DV+jets channel on the production cross-section and the corresponding event-level efficiencies (from Auxiliary Figure...

  • Table 26

    Data from Figure 18e

    10.17182/hepdata.68777.v1/t26

    Upper limits (95% CL) from the DV+$E_T^{miss}$ channel on the production cross-section and the corresponding event-level efficiencies (from Auxiliary Figure...

  • Table 27

    Data from Figure 18f

    10.17182/hepdata.68777.v1/t27

    Upper limits (95% CL) from the DV+jets channel on the production cross-section and the corresponding event-level efficiencies (from Auxiliary Figure...

  • Table 28

    Data from Figure 19

    10.17182/hepdata.68777.v1/t28

    Observed 95% CL exclusion contour in the $m(\tilde{g})$-$c\tau$ plane for the split-SUSY model with gluino production, $[\tilde{g}\to g/qq \tilde{\chi}_1^0]$ decays...

  • Table 29

    Data from Figure 19

    10.17182/hepdata.68777.v1/t29

    Expected 95% CL exclusion contour in the $m(\tilde{g})$-$c\tau$ plane for the split-SUSY model with gluino production, $[\tilde{g}\to g/qq \tilde{\chi}_1^0]$ decays...

  • Table 30

    Data from Figure 20a

    10.17182/hepdata.68777.v1/t30

    Observed 95% CL exclusion contour in the $m(\tilde{g})$-$c\tau$ plane for the split-SUSY model with gluino production, $[\tilde{g}\to tt \tilde{\chi}_1^0]$ decays...

  • Table 31

    Data from Figure 20a

    10.17182/hepdata.68777.v1/t31

    Expected 95% CL exclusion contour in the $m(\tilde{g})$-$c\tau$ plane for the split-SUSY model with gluino production, $[\tilde{g}\to tt \tilde{\chi}_1^0]$ decays...

  • Table 32

    Data from Figure 20b

    10.17182/hepdata.68777.v1/t32

    Observed 95% CL exclusion contour in the $m(\tilde{g})$-$c\tau$ plane for the split-SUSY model with gluino production, $[\tilde{g}\to g/qq \tilde{\chi}_1^0]$ decays...

  • Table 33

    Data from Figure 20b

    10.17182/hepdata.68777.v1/t33

    Expected 95% CL exclusion contour in the $m(\tilde{g})$-$c\tau$ plane for the split-SUSY model with gluino production, $[\tilde{g}\to g/qq \tilde{\chi}_1^0]$ decays...

  • Table 34

    Data from Auxiliary Figure 4

    10.17182/hepdata.68777.v1/t34

    Choice of signal region in the $m(\tilde{g})$-$c\tau$ plane for the split-SUSY models with gluino decays and neutralino masses in GeV...

  • Table 35

    Data from Auxiliary Figure 11c

    10.17182/hepdata.68777.v1/t35

    Upper limits (95% CL) from the DV+$E_T^{miss}$ channel on the production cross-section and the corresponding event-level efficiencies (from Auxiliary Figure...

  • Table 36

    Data from Auxiliary Figure 11d

    10.17182/hepdata.68777.v1/t36

    Upper limits (95% CL) from the DV+$E_T^{miss}$ channel on the production cross-section and the corresponding event-level efficiencies (from Auxiliary Figure...

  • Table 37

    Data from Auxiliary Figure 13a

    10.17182/hepdata.68777.v1/t37

    Vertex mass distributions in data and one RPV SUSY signal model, for vertices with 3, 4 and $\geq$5 tracks in...

  • Table 38

    Data from Auxiliary Figure 13b

    10.17182/hepdata.68777.v1/t38

    Vertex mass distributions in data and one GGM SUSY signal model, for vertices with 3, 4 and $\geq$5 tracks in...

  • Table 39

    Data from Auxiliary Figure 13c

    10.17182/hepdata.68777.v1/t39

    Vertex mass distributions in data and one RPV SUSY signal model, for vertices with 3, 4 and $\geq$5 tracks in...

  • Table 40

    Data from Auxiliary Figure 13d

    10.17182/hepdata.68777.v1/t40

    Vertex mass distributions in data and one split-SUSY signal model, for vertices with 3, 4 and $\geq$5 tracks in the...

  • Table 41

    Data from Auxiliary Figure 14a

    10.17182/hepdata.68777.v1/t41

    Vertex mass distributions in data and one RPV SUSY signal model, for vertices with 0, 1 and $\geq$2 charged leptons...

  • Table 42

    Data from Auxiliary Figure 14b

    10.17182/hepdata.68777.v1/t42

    Vertex mass distributions in data and one RPV SUSY signal model, for vertices with 0, 1 and $\geq$2 charged leptons...

  • Table 43

    Data from Auxiliary Figure 14c

    10.17182/hepdata.68777.v1/t43

    Vertex mass distributions in data and one RPV SUSY signal model, for vertices with 0, 1 and $\geq$2 charged leptons...

  • Table 44

    Data from Auxiliary Table 1

    10.17182/hepdata.68777.v1/t44

    Details of sparticle decay modes, model parameters, approximate number of generated events $N_{\rm evts}$ and total production cross-section $\sigma$ for...

  • Table 45

    Data from Auxiliary Table 2

    10.17182/hepdata.68777.v1/t45

    Numbers of events satisfying each selection criterion in turn for the DV+muon channel, using the model listed in http://hepdata.cedar.ac.uk/view/ins1362183/d44. The...

  • Table 46

    Data from Auxiliary Table 3

    10.17182/hepdata.68777.v1/t46

    Numbers of events satisfying each selection criterion in turn for the DV+electron channel, using the model listed in http://hepdata.cedar.ac.uk/view/ins1362183/d44. The...

  • Table 47

    Data from Auxiliary Table 4

    10.17182/hepdata.68777.v1/t47

    Numbers of events satisfying each selection criterion in turn for the DV+jets channel, using the model listed in http://hepdata.cedar.ac.uk/view/ins1362183/d44. The...

  • Table 48

    Data from Auxiliary Table 5

    10.17182/hepdata.68777.v1/t48

    Numbers of events satisfying each selection criterion in turn for the DV+$E_T^{miss}$ channel, using the model listed in http://hepdata.cedar.ac.uk/view/ins1362183/d44. The...

  • Table 49

    Data from Auxiliary Table 6

    10.17182/hepdata.68777.v1/t49

    Numbers of events satisfying each selection criterion in turn for the dilepton $e^+e^-$ channel, using the model listed in http://hepdata.cedar.ac.uk/view/ins1362183/d44....

  • Table 50

    Data from Auxiliary Table 7

    10.17182/hepdata.68777.v1/t50

    Numbers of events satisfying each selection criterion in turn for the dilepton $e^{\pm}\mu^{\mp}$ channel, using the model listed in http://hepdata.cedar.ac.uk/view/ins1362183/d44....

  • Table 51

    Data from Auxiliary Table 8

    10.17182/hepdata.68777.v1/t51

    Numbers of events satisfying each selection criterion in turn for the dilepton $\mu^+\mu^-$ channel, using the model listed in http://hepdata.cedar.ac.uk/view/ins1362183/d44....

Loading Data...