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Search for long-lived neutral particles decaying into lepton jets in proton-proton collisions at $\sqrt{s}=8$ TeV with the ATLAS detector

The collaboration
JHEP 1411 (2014) 088, 2014

Abstract (data abstract)
CERN-LHC. Several models of physics beyond the Standard Model predict neutral particles that decay into final states consisting of collimated jets of light leptons and hadrons (so-called "lepton jets"). These particles can also be long-lived with decay length comparable to, or even larger than, the LHC detectors' linear dimensions. This paper presents the results of a search for lepton jets in proton--proton collisions at the centre-of-mass energy of $\sqrt{s}$ = 8 TeV in a sample of 20.3 fb$^{-1}$ collected during 2012 with the ATLAS detector at the LHC. Limits on models predicting Higgs boson decays to neutral long-lived lepton jets are derived as a function of the particle's proper decay length.

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Data from Figure 6

10.17182/hepdata.65665.v1/t1

Reconstruction efficiency of TYPE0 LJs as a function of $p_{\mathrm{T}}$ of the $\gamma_{d}$ for $\gamma_{d} \to \mu\mu$ obtained from the...

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Data from Figure 6

10.17182/hepdata.65665.v1/t2

Reconstruction efficiency of TYPE0 LJs as a function of $p_{\mathrm{T}}$ of the $\gamma_{d}$ for $\gamma_{d} \to \mu\mu$ obtained from the...

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Data from Figure 6

10.17182/hepdata.65665.v1/t3

Reconstruction efficiency of TYPE0 LJs as a function of $p_{\mathrm{T}}$ of the $\gamma_{d}$ for $\gamma_{d} \to \mu\mu$ obtained from the...

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Data from Figure 6

10.17182/hepdata.65665.v1/t4

Reconstruction efficiency of TYPE0 LJs as a function of $L_{\mathrm{xy}}$ of the $\gamma_{d}$ for $\gamma_{d} \to \mu\mu$ obtained from the...

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Data from Figure 6

10.17182/hepdata.65665.v1/t5

Reconstruction efficiency of TYPE0 LJs as a function of $L_{\mathrm{xy}}$ of the $\gamma_{d}$ for $\gamma_{d} \to \mu\mu$ obtained from the...

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Data from Figure 6

10.17182/hepdata.65665.v1/t6

Reconstruction efficiency of TYPE0 LJs as a function of $L_{\mathrm{xy}}$ of the $\gamma_{d}$ for $\gamma_{d} \to \mu\mu$ obtained from the...

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Data from Figure 7

10.17182/hepdata.65665.v1/t7

Reconstruction efficiency of TYPE2 LJs as a function of $p_{\mathrm{T}}$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the...

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Data from Figure 7

10.17182/hepdata.65665.v1/t8

Reconstruction efficiency of TYPE2 LJs as a function of $p_{\mathrm{T}}$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the...

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Data from Figure 7

10.17182/hepdata.65665.v1/t9

Reconstruction efficiency of TYPE2 LJs as a function of $p_{\mathrm{T}}$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the...

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Data from Figure 7

10.17182/hepdata.65665.v1/t10

Reconstruction efficiency of TYPE2 LJs as a function of $p_{\mathrm{T}}$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the...

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Data from Figure 7

10.17182/hepdata.65665.v1/t11

Reconstruction efficiency of TYPE2 LJs as a function of $p_{\mathrm{T}}$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the...

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Data from Figure 7

10.17182/hepdata.65665.v1/t12

Reconstruction efficiency of TYPE2 LJs as a function of $L_{\mathrm{xy}}$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the...

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Data from Figure 7

10.17182/hepdata.65665.v1/t13

Reconstruction efficiency of TYPE2 LJs as a function of $L_{\mathrm{xy}}$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the...

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Data from Figure 7

10.17182/hepdata.65665.v1/t14

Reconstruction efficiency of TYPE2 LJs as a function of $L_{\mathrm{xy}}$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the...

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Data from Figure 7

10.17182/hepdata.65665.v1/t15

Reconstruction efficiency of TYPE2 LJs as a function of $L_{\mathrm{xy}}$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the...

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Data from Figure 7

10.17182/hepdata.65665.v1/t16

Reconstruction efficiency of TYPE2 LJs as a function of $L_{\mathrm{xy}}$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the...

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Data from Figure 8

10.17182/hepdata.65665.v1/t17

Reconstruction efficiency of TYPE0 LJs as a function of the $p_{\mathrm{T}}$ of the $s_{d_{1}}$ for LJs with two $\gamma_{d}$'s for...

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Data from Figure 8

10.17182/hepdata.65665.v1/t18

Reconstruction efficiency of TYPE0 LJs as a function of the $p_{\mathrm{T}}$ of the $s_{d_{1}}$ for LJs with two $\gamma_{d}$'s for...

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Data from Figure 8

10.17182/hepdata.65665.v1/t19

Reconstruction efficiency of TYPE1 LJs as a function of the $p_{\mathrm{T}}$ of the $s_{d_{1}}$ for LJs with two $\gamma_{d}$'s for...

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Data from Figure 8

10.17182/hepdata.65665.v1/t20

Reconstruction efficiency of TYPE1 LJs as a function of the $p_{\mathrm{T}}$ of the $s_{d_{1}}$ for LJs with two $\gamma_{d}$'s for...

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Data from Figure 8

10.17182/hepdata.65665.v1/t21

Reconstruction efficiency of TYPE2 LJs as a function of the $p_{\mathrm{T}}$ of the $s_{d_{1}}$ for LJs with two $\gamma_{d}$'s for...

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Data from Figure 8

10.17182/hepdata.65665.v1/t22

Reconstruction efficiency of TYPE2 LJs as a function of the $p_{\mathrm{T}}$ of the $s_{d_{1}}$ for LJs with two $\gamma_{d}$'s for...

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Data from Figure 8

10.17182/hepdata.65665.v1/t23

Reconstruction efficiency of TYPE2 LJs as a function of the $p_{\mathrm{T}}$ of the $s_{d_{1}}$ for LJs with two $\gamma_{d}$'s for...

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Data from Figure 8

10.17182/hepdata.65665.v1/t24

Reconstruction efficiency of TYPE2 LJs as a function of the $p_{\mathrm{T}}$ of the $s_{d_{1}}$ for LJs with two $\gamma_{d}$'s for...

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Data from Figure 9

10.17182/hepdata.65665.v1/t25

Muon trigger efficiency, $\rm \varepsilon$(2mu6), as a function of $p_{T}$ of the $\gamma_{d}$ for $\gamma_{d} \to \mu\mu$ obtained from the...

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Data from Figure 9

10.17182/hepdata.65665.v1/t26

Muon trigger efficiency, $\rm \varepsilon$(2mu6), as a function of $p_{T}$ of the $\gamma_{d}$ for $\gamma_{d} \to \mu\mu$ obtained from the...

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Data from Figure 9

10.17182/hepdata.65665.v1/t27

Muon trigger efficiency, $\rm \varepsilon$(2mu6), as a function of $p_{T}$ of the $\gamma_{d}$ for $\gamma_{d} \to \mu\mu$ obtained from the...

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Data from Figure 9

10.17182/hepdata.65665.v1/t28

Muon trigger efficiency, $\rm \varepsilon$(2mu6), as a function of $\eta$ of the $\gamma_{d}$ for $\gamma_{d} \to \mu\mu$ obtained from the...

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Data from Figure 9

10.17182/hepdata.65665.v1/t29

Muon trigger efficiency, $\rm \varepsilon$(2mu6), as a function of $\eta$ of the $\gamma_{d}$ for $\gamma_{d} \to \mu\mu$ obtained from the...

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Data from Figure 9

10.17182/hepdata.65665.v1/t30

Muon trigger efficiency, $\rm \varepsilon$(2mu6), as a function of $\eta$ of the $\gamma_{d}$ for $\gamma_{d} \to \mu\mu$ obtained from the...

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Data from Figure 10

10.17182/hepdata.65665.v1/t31

Calorimetric trigger efficiency as a function of $p_{T}$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the LJ gun...

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Data from Figure 10

10.17182/hepdata.65665.v1/t32

Calorimetric trigger efficiency as a function of $p_{T}$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the LJ gun...

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Data from Figure 10

10.17182/hepdata.65665.v1/t33

Calorimetric trigger efficiency as a function of $p_{T}$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the LJ gun...

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Data from Figure 10

10.17182/hepdata.65665.v1/t34

Calorimetric trigger efficiency as a function of $p_{T}$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the LJ gun...

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Data from Figure 10

10.17182/hepdata.65665.v1/t35

Calorimetric trigger efficiency as a function of $p_{T}$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the LJ gun...

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Data from Figure 10

10.17182/hepdata.65665.v1/t36

Calorimetric trigger efficiency as a function of $\eta$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the LJ gun...

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Data from Figure 10

10.17182/hepdata.65665.v1/t37

Calorimetric trigger efficiency as a function of $\eta$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the LJ gun...

• #### Table 38

Data from Figure 10

10.17182/hepdata.65665.v1/t38

Calorimetric trigger efficiency as a function of $\eta$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the LJ gun...

• #### Table 39

Data from Figure 10

10.17182/hepdata.65665.v1/t39

Calorimetric trigger efficiency as a function of $\eta$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the LJ gun...

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Data from Figure 10

10.17182/hepdata.65665.v1/t40

Calorimetric trigger efficiency as a function of $\eta$ of the $\gamma_{d}$ for $\gamma_{d} \to ee,\pi\pi$ obtained from the LJ gun...