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Search for new phenomena in a lepton plus high jet multiplicity final state with the ATLAS experiment using $\sqrt{s}$ = 13 Tev proton-proton collision data

The ATLAS collaboration
No Journal Information, 2017

Abstract (data abstract)
CERN-LHC. A search for new phenomena in final states characterized by high jet multiplicity, an isolated lepton (electron or muon) and either zero or at least three b-tagged jets is presented. The search uses 36.1 fb-1 of sqrt(s) = 13 TeV proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider in 2015 and 2016. The dominant sources of background are estimated using parameterized extrapolations, based on observables at medium jet multiplicity, to predict the b-tagged jet multiplicity distribution at the higher jet multiplicities used in the search. No significant excess over the Standard Model expectation is observed and 95% confidence-level limits are extracted constraining four simplified models of R-parity-violating supersymmetry that feature either gluino or top-squark pair production. The exclusion limits reach as high as 2.1 TeV in gluino mass and 1.2 TeV in top-squark mass in the models considered. In addition, an upper limit is set on the cross-section for Standard Model tttt production of 60 fb (6.5 times the Standard Model prediction) at 95% confidence level. Finally, model-independent limits are set on the contribution from new phenomena to the signal-region yields.

  • Table 1

    Data from Figure 6a

    10.17182/hepdata.77491.v2/t1

    The expected background and observed data with five jets in the different b-tag multiplicity bins for the 40 GeV jet...

  • Table 2

    Data from Figure 6b

    10.17182/hepdata.77491.v2/t2

    The expected background and observed data with six jets in the different b-tag multiplicity bins for the 40 GeV jet...

  • Table 3

    Data from Figure 6c

    10.17182/hepdata.77491.v2/t3

    The expected background and observed data with seven jets in the different b-tag multiplicity bins for the 40 GeV jet...

  • Table 4

    Data from Figure 6d

    10.17182/hepdata.77491.v2/t4

    The expected background and observed data with eight jets in the different b-tag multiplicity bins for the 40 GeV jet...

  • Table 5

    Data from Figure 6e

    10.17182/hepdata.77491.v2/t5

    The expected background and observed data with nine jets in the different b-tag multiplicity bins for the 40 GeV jet...

  • Table 6

    Data from Figure 6f

    10.17182/hepdata.77491.v2/t6

    The expected background and observed data with ten jets in the different b-tag multiplicity bins for the 40 GeV jet...

  • Table 7

    Data from Figure 6g

    10.17182/hepdata.77491.v2/t7

    The expected background and observed data with eleven jets in the different b-tag multiplicity bins for the 40 GeV jet...

  • Table 8

    Data from Figure 6h

    10.17182/hepdata.77491.v2/t8

    The expected background and observed data with twelve-or-more jets in the different b-tag multiplicity bins for the 40 GeV jet...

  • Table 9

    Data from Figure 7a

    10.17182/hepdata.77491.v2/t9

    The expected background and observed data with five jets in the different b-tag multiplicity bins for the 60 GeV jet...

  • Table 10

    Data from Figure 7b

    10.17182/hepdata.77491.v2/t10

    The expected background and observed data with six jets in the different b-tag multiplicity bins for the 60 GeV jet...

  • Table 11

    Data from Figure 7c

    10.17182/hepdata.77491.v2/t11

    The expected background and observed data with seven jets in the different b-tag multiplicity bins for the 60 GeV jet...

  • Table 12

    Data from Figure 7d

    10.17182/hepdata.77491.v2/t12

    The expected background and observed data with eight jets in the different b-tag multiplicity bins for the 60 GeV jet...

  • Table 13

    Data from Figure 7e

    10.17182/hepdata.77491.v2/t13

    The expected background and observed data with nine jets in the different b-tag multiplicity bins for the 60 GeV jet...

  • Table 14

    Data from Figure 7f

    10.17182/hepdata.77491.v2/t14

    The expected background and observed data with ten-or-more jets in the different b-tag multiplicity bins for the 60 GeV jet...

  • Table 15

    Data from Figure 8a

    10.17182/hepdata.77491.v2/t15

    The expected background and observed data with five jets in the different b-tag multiplicity bins for the 80 GeV jet...

  • Table 16

    Data from Figure 8b

    10.17182/hepdata.77491.v2/t16

    The expected background and observed data with six jets in the different b-tag multiplicity bins for the 80 GeV jet...

  • Table 17

    Data from Figure 8c

    10.17182/hepdata.77491.v2/t17

    The expected background and observed data with seven jets in the different b-tag multiplicity bins for the 80 GeV jet...

  • Table 18

    Data from Figure 8d

    10.17182/hepdata.77491.v2/t18

    The expected background and observed data with eight jets in the different b-tag multiplicity bins for the 80 GeV jet...

  • Table 19

    Data from Figure 8e

    10.17182/hepdata.77491.v2/t19

    The expected background and observed data with nine jets in the different b-tag multiplicity bins for the 80 GeV jet...

  • Table 20

    Data from Figure 8f

    10.17182/hepdata.77491.v2/t20

    The expected background and observed data with ten-or-more jets in the different b-tag multiplicity bins for the 80 GeV jet...

  • Table 21

    Data from Figure 9a

    10.17182/hepdata.77491.v2/t21

    Observed exclusion contours on the gluino and neutralino masses in a model where the gluino decays via a virtual top...

  • Table 22

    Data from Figure 9a

    10.17182/hepdata.77491.v2/t22

    Expected exclusion contours on the gluino and neutralino masses in a model where the gluino decays via a virtual top...

  • Table 23

    Data from Figure 9b

    10.17182/hepdata.77491.v2/t23

    Observed exclusion contours on the gluino and stop masses in a model where the gluino decays to a top quark...

  • Table 24

    Data from Figure 9b

    10.17182/hepdata.77491.v2/t24

    Expected exclusion contours on the gluino and stop masses in a model where the gluino decays to a top quark...

  • Table 25

    Data from Figure 9c

    10.17182/hepdata.77491.v2/t25

    Observed exclusion contours on the gluino and neutralino masses in a model with a gluino decaying to two light quarks...

  • Table 26

    Data from Figure 9c

    10.17182/hepdata.77491.v2/t26

    Expected exclusion contours on the gluino and neutralino masses in a model with a gluino decaying to two light quarks...

  • Table 27

    Data from Figure 10

    10.17182/hepdata.77491.v2/t27

    Observed exclusion contours on the stop and neutralino masses in a model where the stop decays to a third-generation quark...

  • Table 28

    Data from Figure 10

    10.17182/hepdata.77491.v2/t28

    Expected exclusion contours on the stop and neutralino masses in a model where the stop decays to a third-generation quark...

  • Table 29

    Data from Figure 10

    10.17182/hepdata.77491.v2/t29

    Observed exclusion contours on the stop and neutralino masses in a model where the stop decays to a top and...

  • Table 30

    Data from Figure 10

    10.17182/hepdata.77491.v2/t30

    Expected exclusion contours on the stop and neutralino masses in a model where the stop decays to a top and...

  • Table 31

    Data from Auxiliary Figure 4a

    10.17182/hepdata.77491.v2/t31

    Observed upper limits on the model cross-section in units of pb as a function of the gluino and neutralino masses...

  • Table 32

    Data from Auxiliary Figure 4b

    10.17182/hepdata.77491.v2/t32

    Observed upper limits on the model cross-section in units of pb as a function of the gluino and stop masses...

  • Table 33

    Data from Auxiliary Figure 4c

    10.17182/hepdata.77491.v2/t33

    Observed upper limits on the model cross-section in units of pb as a function of the gluino and neutralino masses...

  • Table 34

    Data from Auxiliary Figure 5a

    10.17182/hepdata.77491.v2/t34

    Observed upper limits on the model cross-section in units of pb as a function of the stop and neutralino masses...

  • Table 35

    Data from Auxiliary Figure 5b

    10.17182/hepdata.77491.v2/t35

    Observed upper limits on the model cross-section in units of pb as a function of the stop and neutralino masses...

  • Table 36

    Data from Auxiliary Figure 6a

    10.17182/hepdata.77491.v2/t36

    Acceptance as a function of the gluino and stop masses in a model where the gluino decays to a top...

  • Table 37

    Data from Auxiliary Figure 6b

    10.17182/hepdata.77491.v2/t37

    Efficiency as a function of the gluino and stop masses in a model where the gluino decays to a top...

  • Table 38

    Data from Auxiliary Figure 7a

    10.17182/hepdata.77491.v2/t38

    Acceptance as a function of the gluino and neutralino masses in a model with a gluino decaying to two light...

  • Table 39

    Data from Auxiliary Figure 7b

    10.17182/hepdata.77491.v2/t39

    Efficiency as a function of the gluino and neutralino masses in a model with a gluino decaying to two light...

  • Table 40

    Data from Auxiliary Table 1

    10.17182/hepdata.77491.v2/t40

    Cut flow for a model of gluino pair production where the gluino decays to two (u, d, s, c) quarks...

  • Table 41

    Data from Auxiliary Table 2

    10.17182/hepdata.77491.v2/t41

    Cut flow for a model of gluino pair production where each gluino decays to a top quark and a top...

  • Table 42

    Data from Auxiliary Table 3

    10.17182/hepdata.77491.v2/t42

    Cut flow for a model of gluino pair production where each gluino decays via an off-shell top squark to two...

  • Table 43

    Data from Auxiliary Table 4

    10.17182/hepdata.77491.v2/t43

    Cut flow for a model of right-handed top squark pair production with the top squark decaying to the lightest supersymmetric...

Version 2 modifications: add a resource "location: OneLeptonMultiJets2016.cxx"

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