• Browse all
Search for heavy charged long-lived particles in the ATLAS detector in 31.6 fb$^{-1}$ of proton-proton collision data at $\sqrt{s} = 13$ TeV

The collaboration
No Journal Information, 2019

Abstract (data abstract)
CERN-LHC. Search for heavy charged long-lived particles in the ATLAS detector in 36.1/fb of proton-proton collision data at sqrt(s) = 13 TeV. A search for heavy charged long-lived particles is performed using a data sample of 31.6/fb of proton-proton collisions at sqrt(s) = 13 TeV collected by the ATLAS experiment at the Large Hadron Collider. The search is based on observables related to ionization energy loss and time of flight, which are sensitive to the velocity of heavy charged particles traveling significantly slower than the speed of light. Multiple search strategies for a wide range of lifetimes, corresponding to path lengths of a few meters, are defined as model-independently as possible, by referencing several representative physics cases that yield long-lived particles within supersymmetric models, such as gluinos/squarks (R-hadrons), charginos and staus. No significant deviations from the expected Standard Model background are observed. Upper limits at 95% confidence level are provided on the production cross sections of long-lived R-hadrons as well as directly pair-produced staus and charginos. These results translate into lower limits on the masses of long-lived gluino, sbottom and stop R-hadrons, as well as staus and charginos of 2000 GeV, 1250 GeV, 1340 GeV, 430 GeV and 1090 GeV, respectively.

• #### Overview

10.17182/hepdata.86565.v1/t1

- - - - - - - - Overview of HEPData Record - - - - - - - -...

• #### Table 1

Data from Figure 3 (left)

10.17182/hepdata.86565.v1/t2

Lower mass requirement for signal regions.

• #### Table 2

Data from Figure 3 (right)

10.17182/hepdata.86565.v1/t3

Lower mass requirement for signal regions.

• #### Table 3

Data from Figure 8

10.17182/hepdata.86565.v1/t4

Expected and observed events in the 16 discovery regions along with the according control regions.

• #### Table 4

Data from Table 3

10.17182/hepdata.86565.v1/t5

Expected signal yield and acceptance x efficiency, estimated background and observed number of events in data for the full range...

• #### Table 5

Data from Table 4

10.17182/hepdata.86565.v1/t6

Expected signal yield and acceptance x efficiency, estimated background and observed number of events in data for the full range...

• #### Table 6

Data from Table 5

10.17182/hepdata.86565.v1/t7

p0-values and model-independent upper limits on cross-section x acceptance x efficiency for the 16 discovery regions.

• #### Table 7

Data from Table 6

10.17182/hepdata.86565.v1/t8

Expected signal yield and acceptance x efficiency, estimated background and observed number of events in data for the full range...

• #### Table 8

Data from Table 7

10.17182/hepdata.86565.v1/t9

Expected signal yield and acceptance x efficiency, estimated background and observed number of events in data for the full range...

• #### Table 9

Data from Table 8

10.17182/hepdata.86565.v1/t10

Expected signal yield and acceptance x efficiency, estimated background and observed number of events in data for the full range...

• #### Table 10

Data from Figure 9 (top)

10.17182/hepdata.86565.v1/t11

Upper cross-section limit in gluino R-hadron search.

• #### Table 11

Data from Figure 9 (bottom-left)

10.17182/hepdata.86565.v1/t12

Upper cross-section limit in sbottom R-hadron search.

• #### Table 12

Data from Figure 9 (bottom-right)

10.17182/hepdata.86565.v1/t13

Upper cross-section limit in stop R-hadron search.

• #### Table 13

Data from Figure 10 (left)

10.17182/hepdata.86565.v1/t14

Upper cross-section limit in stau search.

• #### Table 14

Data from Figure 10 (right)

10.17182/hepdata.86565.v1/t15

Upper cross-section limit in chargino search.

• #### Table 15

Data from Figure 11

10.17182/hepdata.86565.v1/t16

Lower mass limit as function of gluino lifetime.

• #### Table 16

Data from auxiliary Table 8

10.17182/hepdata.86565.v1/t17

Acceptance x efficiency, acceptance and efficiency for the full range of simulated masses in the MS-agnostic R-hadron search.

• #### Table 17

Data from auxiliary Figures 8a, 8b, 8c

10.17182/hepdata.86565.v1/t18

Upper cross-section limit in meta-stable gluino R-hadron search.

• #### Table 18

Data from auxiliary Figure 9

10.17182/hepdata.86565.v1/t19

Flavor composition of 800 GeV stop R-hadrons simulated using the generic model as a function of radial distance from the...

• #### Table 19

Data from auxiliary Figure 10

10.17182/hepdata.86565.v1/t20

Flavor composition of 800 GeV anti-stop R-hadrons simulated using the generic model as a function of radial distance from the...

• #### Table 20

Data from auxiliary Figure 11

10.17182/hepdata.86565.v1/t21

Flavor composition of 800 GeV stop R-hadrons simulated using the Regge model as a function of radial distance from the...

• #### Table 21

Data from auxiliary Figure 12

10.17182/hepdata.86565.v1/t22

Flavor composition of 800 GeV anti-stop R-hadrons simulated using the Regge model as a function of radial distance from the...

• #### Table 22

Data from auxiliary Figure 14a

10.17182/hepdata.86565.v1/t23

ETmiss trigger efficiency as function of true ETmiss (EtmissTurnOn).

• #### Table 23

Data from auxiliary Figure 14b

10.17182/hepdata.86565.v1/t24

Single-muon trigger efficiency as function of $|\eta|$ and $\beta$ (SingleMuTurnOn).

• #### Table 24

Data from auxiliary Figure 15a

10.17182/hepdata.86565.v1/t25

Candidate reconstruction efficiency for ID+Calo selection (IDCaloEff).

• #### Table 25

Data from auxiliary Figure 15b

10.17182/hepdata.86565.v1/t26

Candidate reconstruction efficiency for loose selection (LooseEff).

• #### Table 26

Data from auxiliary Figure 15c

10.17182/hepdata.86565.v1/t27

Efficiency for a loose candidate to be promoted to a tight candidate (TightPromotionEff).

• #### Table 27

Data from auxiliary Figure 16a

10.17182/hepdata.86565.v1/t28

Resolution and average of reconstructed dE/dx mass for a given simulated mass for ID+calo candidates.

• #### Table 28

Data from auxiliary Figure 16b

10.17182/hepdata.86565.v1/t29

Resolution and average of reconstructed ToF mass for a given simulated mass for ID+calo candidates.

• #### Table 29

Data from auxiliary Figure 16c

10.17182/hepdata.86565.v1/t30

Resolution and average of reconstructed ToF mass for a given simulated mass for FullDet candidates.