Search for chargino-neutralino production with mass splittings near the electroweak scale in three-lepton final states in $\sqrt {s}$=13 TeV $pp$ collisions with the ATLAS detector

The ATLAS collaboration
, , , , , , , , ,
Phys.Rev.D 101 (2020) 072001, 2020.
https://doi.org/10.17182/hepdata.91127

Abstract (data abstract)
A search for supersymmetry through the pair production of electroweakinos with mass splittings near the electroweak scale and decaying via on-shell $W$ and $Z$ bosons is presented for a three-lepton final state. The analyzed proton-proton collision data taken at a center-of-mass energy of sqrt(s) = 13 TeV were collected between 2015 and 2018 by the ATLAS experiment at the Large Hadron Collider, corresponding to an integrated luminosity of 139/fb. A search, emulating the recursive jigsaw reconstruction technique with easily reproducible laboratory-frame variables, is performed. The two excesses observed in the 2015-2016 data recursive jigsaw analysis in the low-mass three-lepton phase space are reproduced. Results with the full dataset are in agreement with the Standard Model expectations. They are interpreted to set exclusion limits at 95% confidence level on simplified models of chargino-neutralino pair production for masses up to 345 GeV.

  • dataMC SR-low mT

    fig_05a

    10.17182/hepdata.91127.v1/t1

    Distributions in SR-low of the data and post-fit background prediction for mT. The SR-low event selections are applied for each...

  • dataMC SR-low Hboost

    fig_05b

    10.17182/hepdata.91127.v1/t2

    Distributions in SR-low of the data and post-fit background prediction for Hboost. The SR-low event selections are applied for each...

  • dataMC SR-low meff3L/Hboost

    fig_05c

    10.17182/hepdata.91127.v1/t3

    Distributions in SR-low of the data and post-fit background prediction for meff3ℓ/Hboost. The SR-low event selections are applied for each...

  • dataMC SR-low pTsoft/(pTsoft+meff3L)

    fig_05d

    10.17182/hepdata.91127.v1/t4

    Distributions in SR-low of the data and post-fit background prediction for pTsoft/(pTsoft + meff3ℓ). The SR-low event selections are applied...

  • dataMC SR-ISR mT

    fig_06a

    10.17182/hepdata.91127.v1/t5

    Distributions in SR-ISR of the data and post-fit background prediction for mT. The SR-ISR event selections are applied for each...

  • dataMC SR-ISR R(ETmiss,jets)

    fig_06b

    10.17182/hepdata.91127.v1/t6

    Distributions in SR-ISR of the data and post-fit background prediction for R(ETmiss,jets). The SR-ISR event selections are applied for each...

  • dataMC SR-ISR pTsoft

    fig_06c

    10.17182/hepdata.91127.v1/t7

    Distributions in SR-ISR of the data and post-fit background prediction for pTsoft. The SR-ISR event selections are applied for each...

  • dataMC SR-ISR pTjets

    fig_06d

    10.17182/hepdata.91127.v1/t8

    Distributions in SR-ISR of the data and post-fit background prediction for pTjets. The SR-ISR event selections are applied for each...

  • Observed Limit 3LeRJR

    fig_07

    10.17182/hepdata.91127.v1/t9

    Observed exclusion contour on C1N2 production assuming on-shell $W/Z$ decays as a function of the C1/N2 and N1 masses, and...

  • Expected Limit 3LeRJR

    fig_07

    10.17182/hepdata.91127.v1/t10

    Expected exclusion contour on C1N2 production assuming on-shell $W/Z$ decays as a function of the C1/N2 and N1 masses, and...

  • Observed Limit 3LeRJR (Up)

    fig_07

    10.17182/hepdata.91127.v1/t11

    Plus 1$\sigma$ uncertainty, varying the signal cross section within its uncertainty, on the observed exclusion contour on C1N2 production assuming...

  • Observed Limit 3LeRJR (Down)

    fig_07

    10.17182/hepdata.91127.v1/t12

    Minus 1$\sigma$ uncertainty, varying the signal cross section within its uncertainty, on the observed exclusion contour on C1N2 production assuming...

  • Expected Limit 3LeRJR (Up)

    fig_07

    10.17182/hepdata.91127.v1/t13

    Plus 1$\sigma$ uncertainty, due to uncertainties in the background prediction and experimental uncertainties affecting the signal, on the expected exclusion...

  • Expected Limit 3LeRJR (Down)

    fig_07

    10.17182/hepdata.91127.v1/t14

    Minus 1$\sigma$ uncertainty, due to uncertainties in the background prediction and experimental uncertainties affecting the signal, on the expected exclusion...

  • Observed Upper Limits

    figaux_12a

    10.17182/hepdata.91127.v1/t15

    Upper limits on observed wino-bino simplified model signal cross section $\sigma_\text{obs}^\text{95}$.

  • Expected Upper Limits

    figaux_12b

    10.17182/hepdata.91127.v1/t16

    Upper limits on expected wino-bino simplified model signal cross section $\sigma_\text{exp}^\text{95}$.

  • Acceptance SR-low dMgeq100

    figaux_13a

    10.17182/hepdata.91127.v1/t17

    Signal acceptance in SR-low, for signals with $m(\widetilde{\chi}^{\pm}_{1}/\widetilde{\chi}^{0}_{2}) - m\widetilde{\chi}^{0}_{1} \geq 100$ GeV.

  • Efficiency SR-low dMgeq100

    figaux_13b

    10.17182/hepdata.91127.v1/t18

    Signal efficiency in SR-low, for signals with $m(\widetilde{\chi}^{\pm}_{1}/\widetilde{\chi}^{0}_{2}) - m\widetilde{\chi}^{0}_{1} \geq 100$ GeV.

  • Acceptance SR-ISR dMgeq100

    figaux_13c

    10.17182/hepdata.91127.v1/t19

    Signal acceptance in SR-ISR, for signals with $m(\widetilde{\chi}^{\pm}_{1}/\widetilde{\chi}^{0}_{2}) - m\widetilde{\chi}^{0}_{1} \geq 100$ GeV.

  • Efficiency SR-ISR dMgeq100

    figaux_13d

    10.17182/hepdata.91127.v1/t20

    Signal efficiency in SR-ISR, for signals with $m(\widetilde{\chi}^{\pm}_{1}/\widetilde{\chi}^{0}_{2}) - m\widetilde{\chi}^{0}_{1} \geq 100$ GeV.

  • Acceptance SR-low dMlt100

    figaux_14a

    10.17182/hepdata.91127.v1/t21

    Signal acceptance in SR-low, for signals with $m(\widetilde{\chi}^{\pm}_{1}/\widetilde{\chi}^{0}_{2}) - m\widetilde{\chi}^{0}_{1} < 100$ GeV.

  • Efficiency SR-low dMlt100

    figaux_14b

    10.17182/hepdata.91127.v1/t22

    Signal efficiency in SR-low, for signals with $m(\widetilde{\chi}^{\pm}_{1}/\widetilde{\chi}^{0}_{2}) - m\widetilde{\chi}^{0}_{1} < 100$ GeV.

  • Acceptance SR-ISR dMlt100

    figaux_14c

    10.17182/hepdata.91127.v1/t23

    Signal acceptance in SR-ISR, for signals with $m(\widetilde{\chi}^{\pm}_{1}/\widetilde{\chi}^{0}_{2}) - m\widetilde{\chi}^{0}_{1} < 100$ GeV.

  • Efficiency SR-ISR dMlt100

    figaux_14d

    10.17182/hepdata.91127.v1/t24

    Signal efficiency in SR-ISR, for signals with $m(\widetilde{\chi}^{\pm}_{1}/\widetilde{\chi}^{0}_{2}) - m\widetilde{\chi}^{0}_{1} < 100$ GeV.

  • Yields SR

    tab_06

    10.17182/hepdata.91127.v1/t25

    The observed and expected yields after the background-only fit in the SRs. The normalization factors of the $WZ$ sample for...

  • Results SR

    tab_07

    10.17182/hepdata.91127.v1/t26

    Summary of the expected background and data yields in $\text{SR-low}$ and $\text{SR-ISR}$. The second and third columns show the data...

  • Upper Limits

    tabaux_01

    10.17182/hepdata.91127.v1/t27

    Upper limits on observed (expected) wino-bino simplified model signal cross section $\sigma_\text{obs(exp)}^\text{95}$.

  • Cutflow SR-ISR

    tabaux_02

    10.17182/hepdata.91127.v1/t28

    Full list of event selections and MC generator-weighted yields and in $\text{SR-ISR}$ for the main $WZ$ background and a representative...

  • Cutflow SR-low

    tabaux_03

    10.17182/hepdata.91127.v1/t29

    Full list of event selections and MC generator-weighted yields and in $\text{SR-low}$ for the main $WZ$ background and a representative...

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