HEPData

Abstract

A search for the direct production of charginos and neutralinos in final states with at least two hadronically decaying tau leptons is presented. The analysis uses a dataset of $pp$ collisions corresponding to an integrated luminosity of 36.1 fb$^{-1}$, recorded with the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of $\sqrt{s}=$ 13 TeV. No significant deviation from the Standard Model background expectation is observed. Limits are derived in scenarios of $\tilde{\chi}_{1}^{+}\tilde{\chi}_{1}^{-}$ pair production and of $\tilde{\chi}_{1}^{\pm}\tilde{\chi}_{2}^{0}$ and $\tilde{\chi}_{1}^{+}\tilde{\chi}_{1}^{-}$ production. Chargino masses up to 630 GeV are excluded at 95\% confidence level in the scenario of direct production of $\tilde{\chi}_{1}^{+}\tilde{\chi}_{1}^{-}$ for a massless $\tilde{\chi}_{1}^{0}$. Common $\tilde{\chi}_{1}^{\pm}$, $\tilde{\chi}_{2}^{0}$ masses up to 760 GeV are excluded in the case of production of $\tilde{\chi}_{1}^{\pm}\tilde{\chi}_{2}^{0}$ and $\tilde{\chi}_{1}^{+}\tilde{\chi}_{1}^{-}$ assuming a massless $\tilde{\chi}_{1}^{0}$.

CR kinematics 1

Data from Figure 4a

10.17182/hepdata.78377.v1/t1

The $E_{\mathrm T}^{\mathrm{miss}}$ distribution in the $W$-CR region. The SM backgrounds other than multi-jet production are estimated from MC simulation....
https://www.hepdata.net/record/data/130281yaml https://www.hepdata.net/record/data/130281/csvcsv
CR kinematics 2

Data from Figure 4b

10.17182/hepdata.78377.v1/t2

The $m_{\mathrm{T2}}$ distribution in the $W$-CR region. The SM backgrounds other than multi-jet production are estimated from MC simulation. The...
https://www.hepdata.net/record/data/130282yaml https://www.hepdata.net/record/data/130282/csvcsv
VR kinematics 1

Data from Figure 3a

10.17182/hepdata.78377.v1/t3

The $E_{\mathrm T}^{\mathrm{miss}}$ distribution in the multi-jet background VR-F for SR-lowMass. The stacked histograms show the contribution of the non-multi-jet...
https://www.hepdata.net/record/data/130283yaml https://www.hepdata.net/record/data/130283/csvcsv
VR kinematics 2

Data from Figure 3b

10.17182/hepdata.78377.v1/t4

The $m_{\mathrm{T2}}$ distribution in the multi-jet background VR-F for SR-lowMass. The stacked histograms show the contribution of the non-multi-jet SM...
https://www.hepdata.net/record/data/130284yaml https://www.hepdata.net/record/data/130284/csvcsv
VR kinematics 3

Data from Figure 3c

10.17182/hepdata.78377.v1/t5

The $E_{\mathrm T}^{\mathrm{miss}}$ distribution in the multi-jet background VR-F for SR-highMass. The stacked histograms show the contribution of the non-multi-jet...
https://www.hepdata.net/record/data/130285yaml https://www.hepdata.net/record/data/130285/csvcsv
VR kinematics 4

Data from Figure 3d

10.17182/hepdata.78377.v1/t6

The $m_{\mathrm{T2}}$ distribution in the multi-jet background VR-F for SR-highMass. The stacked histograms show the contribution of the non-multi-jet SM...
https://www.hepdata.net/record/data/130286yaml https://www.hepdata.net/record/data/130286/csvcsv
VR kinematics 5

Data from Figure 4c

10.17182/hepdata.78377.v1/t7

The $E_{\mathrm T}^{\mathrm{miss}}$ distribution in the $W$-VR region. The SM backgrounds other than multi-jet production are estimated from MC simulation....
https://www.hepdata.net/record/data/130287yaml https://www.hepdata.net/record/data/130287/csvcsv
VR kinematics 6

Data from Figure 4d

10.17182/hepdata.78377.v1/t8

The $m_{\mathrm{T2}}$ distribution in the $W$-VR region. The SM backgrounds other than multi-jet production are estimated from MC simulation. The...
https://www.hepdata.net/record/data/130288yaml https://www.hepdata.net/record/data/130288/csvcsv
VR kinematics 7

Data from Figure 5a

10.17182/hepdata.78377.v1/t9

The $m_{\mathrm{T2}}$ distribution in the $Z$-VR region. The SM backgrounds other than multi-jet production are estimated from MC simulation. The...
https://www.hepdata.net/record/data/130289yaml https://www.hepdata.net/record/data/130289/csvcsv
VR kinematics 8

Data from Figure 5b

10.17182/hepdata.78377.v1/t10

The $m_{\mathrm{T2}}$ distribution in the Top-VR region. The SM backgrounds other than multi-jet production are estimated from MC simulation. The...
https://www.hepdata.net/record/data/130290yaml https://www.hepdata.net/record/data/130290/csvcsv
VR kinematics 9

Data from Figure 5c

10.17182/hepdata.78377.v1/t11

The $m_{\mathrm{T2}}$ distribution in the $WW$-VR region. The SM backgrounds other than multi-jet production are estimated from MC simulation. The...
https://www.hepdata.net/record/data/130291yaml https://www.hepdata.net/record/data/130291/csvcsv
VR kinematics 10

Data from Figure 5d

10.17182/hepdata.78377.v1/t12

The $m_{\mathrm{T2}}$ distribution in the $ZZ$-VR region. The SM backgrounds other than multi-jet production are estimated from MC simulation. The...
https://www.hepdata.net/record/data/130292yaml https://www.hepdata.net/record/data/130292/csvcsv
N-1 SR kinematics 1

Data from Figure 6a

10.17182/hepdata.78377.v1/t13

The $m_{\mathrm{T2}}$ distribution before the $m_{\mathrm{T2}}$ requirement is applied for SR-lowMass region, where the arrow indicates the position of the...
https://www.hepdata.net/record/data/130293yaml https://www.hepdata.net/record/data/130293/csvcsv
N-1 SR kinematics 2

Data from Figure 6b

10.17182/hepdata.78377.v1/t14

The $m_{\mathrm{T2}}$ distribution before the $m_{\mathrm{T2}}$ requirement is applied for SR-highMass region, where the arrow indicates the position of the...
https://www.hepdata.net/record/data/130294yaml https://www.hepdata.net/record/data/130294/csvcsv
Exclusion contour 1 (obs.)

Data from Figure 7a

10.17182/hepdata.78377.v1/t15

Observed exclusion contours in chargino pair production model.
https://www.hepdata.net/record/data/130295yaml https://www.hepdata.net/record/data/130295/csvcsv
Exclusion contour 1 (exp.)

Data from Figure 7a

10.17182/hepdata.78377.v1/t16

Expected exclusion contours in chargino pair production model.
https://www.hepdata.net/record/data/130296yaml https://www.hepdata.net/record/data/130296/csvcsv
Exclusion contour 2 (obs.)

Data from Figure 7b

10.17182/hepdata.78377.v1/t17

Observed exclusion contours in chargino chargino and chargino neutralino production model.
https://www.hepdata.net/record/data/130297yaml https://www.hepdata.net/record/data/130297/csvcsv
Exclusion contour 2 (exp.)

Data from Figure 7b

10.17182/hepdata.78377.v1/t18

Expected exclusion contours in chargino chargino and chargino neutralino production model.
https://www.hepdata.net/record/data/130298yaml https://www.hepdata.net/record/data/130298/csvcsv
X-section U.L. 1

Data from Figure 8a

10.17182/hepdata.78377.v1/t19

Observed upper limits on the model cross-section in units of pb as a function of the chargino and neutralino masses...
https://www.hepdata.net/record/data/130299yaml https://www.hepdata.net/record/data/130299/csvcsv
X-section U.L. 2

Data from Figure 8b

10.17182/hepdata.78377.v1/t20

Observed upper limits on the model cross-section in units of pb as a function of the chargino and neutralino masses...
https://www.hepdata.net/record/data/130300yaml https://www.hepdata.net/record/data/130300/csvcsv
Best SR

Data from Figure 9

10.17182/hepdata.78377.v1/t21

Best signal region used in chargino chargino and chargino neutralino pair production, H is corresponding to SR-highMass and L is...
https://www.hepdata.net/record/data/130301yaml https://www.hepdata.net/record/data/130301/csvcsv
1D limit 1 (obs.)

Data from Figure 10a

10.17182/hepdata.78377.v1/t22

Observed CLs significance in variable-x model of chargino chargino pair production for compressed mass scenario.
https://www.hepdata.net/record/data/130302yaml https://www.hepdata.net/record/data/130302/csvcsv
1D limit 1 (exp.)

Data from Figure 10a

10.17182/hepdata.78377.v1/t23

Expected CLs significance in variable-x model of chargino chargino pair production for compressed mass scenario.
https://www.hepdata.net/record/data/130303yaml https://www.hepdata.net/record/data/130303/csvcsv
1D limit 2 (obs.)

Data from Figure 10b

10.17182/hepdata.78377.v1/t24

Observed CLs significance in variable-x model of chargino chargino pair production for large mass splitting scenario.
https://www.hepdata.net/record/data/130304yaml https://www.hepdata.net/record/data/130304/csvcsv
1D limit 2 (exp.)

Data from Figure 10b

10.17182/hepdata.78377.v1/t25

Expected CLs significance in variable-x model of chargino chargino pair production for large mass splitting scenario.
https://www.hepdata.net/record/data/130305yaml https://www.hepdata.net/record/data/130305/csvcsv
1D limit 3 (obs.)

Data from Figure 10c

10.17182/hepdata.78377.v1/t26

Observed CLs significance in variable-x model of chargino chargino and chargino neutralino pair production for compressed mass scenario.
https://www.hepdata.net/record/data/130306yaml https://www.hepdata.net/record/data/130306/csvcsv
1D limit 3 (exp.)

Data from Figure 10c

10.17182/hepdata.78377.v1/t27

Expected CLs significance in variable-x model of chargino chargino and chargino neutralino pair production for compressed mass scenario.
https://www.hepdata.net/record/data/130307yaml https://www.hepdata.net/record/data/130307/csvcsv
1D limit 4 (obs.)

Data from Figure 10d

10.17182/hepdata.78377.v1/t28

Observed CLs significance in variable-x model of chargino chargino and chargino neutralino pair production for large mass splitting scenario.
https://www.hepdata.net/record/data/130308yaml https://www.hepdata.net/record/data/130308/csvcsv
1D limit 4 (exp.)

Data from Figure 10d

10.17182/hepdata.78377.v1/t29

Expected CLs significance in variable-x model of chargino chargino and chargino neutralino pair production for large mass splitting scenario.
https://www.hepdata.net/record/data/130309yaml https://www.hepdata.net/record/data/130309/csvcsv
Acceptance 1

Data from Figure 13a

10.17182/hepdata.78377.v1/t30

Acceptance in SR-lowMass for CHARGINO1 NEUTRALINO2 production.
https://www.hepdata.net/record/data/130310yaml https://www.hepdata.net/record/data/130310/csvcsv
Acceptance 2

Data from Figure 13c

10.17182/hepdata.78377.v1/t31

Acceptance in SR-highMass for CHARGINO1 NEUTRALINO2 production.
https://www.hepdata.net/record/data/130311yaml https://www.hepdata.net/record/data/130311/csvcsv
Acceptance 3

Data from Figure 13e

10.17182/hepdata.78377.v1/t32

Acceptance in SR-highMass for CHARGINO1 CHARGINO1 production.
https://www.hepdata.net/record/data/130312yaml https://www.hepdata.net/record/data/130312/csvcsv
Efficiency 1

Data from Figure 13b

10.17182/hepdata.78377.v1/t33

Efficiency in SR-lowMass for CHARGINO1 NEUTRALINO2 production.
https://www.hepdata.net/record/data/130313yaml https://www.hepdata.net/record/data/130313/csvcsv
Efficiency 2

Data from Figure 13d

10.17182/hepdata.78377.v1/t34

Efficiency in SR-highMass for CHARGINO1 NEUTRALINO2 production.
https://www.hepdata.net/record/data/130314yaml https://www.hepdata.net/record/data/130314/csvcsv
Efficiency 3

Data from Figure 13f

10.17182/hepdata.78377.v1/t35

Efficiency in SR-highMass for CHARGINO1 CHARGINO1 production.
https://www.hepdata.net/record/data/130315yaml https://www.hepdata.net/record/data/130315/csvcsv
Cutflow 1

Data from Table 10

10.17182/hepdata.78377.v1/t36

Cut flow for the reference point 1 (CHARGINO1 NEUTRALINO2 production) in SR-lowMass. The column labelled $N_{raw}$ shows the results for...
https://www.hepdata.net/record/data/130316yaml https://www.hepdata.net/record/data/130316/csvcsv
Cutflow 2

Data from Table 11

10.17182/hepdata.78377.v1/t37

Cut flow for the reference point 2 (CHARGINO1 CHARGINO1 production) in SR-highMass. The column labelled $N_{raw}$ shows the results for...
https://www.hepdata.net/record/data/130317yaml https://www.hepdata.net/record/data/130317/csvcsv

CR kinematics 1

CR kinematics 2

VR kinematics 1

VR kinematics 2

VR kinematics 3

VR kinematics 4

VR kinematics 5

VR kinematics 6

VR kinematics 7

VR kinematics 8

VR kinematics 9

VR kinematics 10

N-1 SR kinematics 1

N-1 SR kinematics 2

Exclusion contour 1 (obs.)

Exclusion contour 1 (exp.)

Exclusion contour 2 (obs.)

Exclusion contour 2 (exp.)

X-section U.L. 1

X-section U.L. 2

Best SR

1D limit 1 (obs.)

1D limit 1 (exp.)

1D limit 2 (obs.)

1D limit 2 (exp.)

1D limit 3 (obs.)

1D limit 3 (exp.)

1D limit 4 (obs.)

1D limit 4 (exp.)

Acceptance 1

Acceptance 2

Acceptance 3

Efficiency 1

Efficiency 2

Efficiency 3

Cutflow 1

Cutflow 2

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