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Measurements of the pp $\to$ WZ inclusive and differential production cross section and constraints on charged anomalous triple gauge couplings at $\sqrt{s} =$ 13 TeV

The collaboration
JHEP 04 (2019) 122, 2019.

Abstract (data abstract)
A search for direct top squark pair production resulting in events with either a same-flavour opposite-sign dilepton pair with invariant mass compatible with a $Z$ boson or a pair of jets compatible with a Standard Model (SM) Higgs boson ($h$) is presented. Requirements on additional leptons, jets, jets identified as originating from b-quarks, and missing transverse momentum are imposed to target the other decay products of the top squark pair. The analysis is performed using proton-proton collision data at sqrt{s} = 13 TeV collected with the ATLAS detector at the LHC in 2015-2016, corresponding to an integrated luminosity of 36.1 fb$^{−1}$. No excess is observed in the data with respect to the expected SM predictions. The results are interpreted in two sets of models. In the first set, direct production of pairs of lighter top squarks ($\tilde{t}_1$) with long decay chains involving $Z$ or Higgs bosons is considered. The second set includes direct pair production of the heavier top squark pairs ($\tilde{t}_2$) decaying via $\tilde{t}_2 \rightarrow Z \tilde{t}_1$ or $\tilde{t}_2 \rightarrow h \tilde{t}_1$. The results exclude at 95% confidence level $\tilde{t}_2$ and $\tilde{t}_1$ masses up to about 800 GeV, extending the exclusion region of supersymmetric parameter space covered by previous LHC searches.

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10.17182/hepdata.89320.v1/t1

Differential cross section in bins of pT(Z). Values are expressed as a fraction of the total cross section. The eee...

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10.17182/hepdata.89320.v1/t2

Expected and observed one-dimensional confidence intervals (CI) at 95% confidence level for each of the considered EFT parameters, accounting only...

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10.17182/hepdata.89320.v1/t3

Expected and observed one-dimensional confidence intervals (CI) at 95% confidence level for each of the considered EFT parameters. Both the...

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10.17182/hepdata.89320.v1/t4

Differential cross section in bins of pT(Z). Values are expressed as a fraction of the total cross section. The inclusive...

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10.17182/hepdata.89320.v1/t5

Differential cross section in bins of pT(Z). Values are expressed as a fraction of the total cross section. The emm...

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10.17182/hepdata.89320.v1/t6

Differential cross section in bins of mass of the WZ system. Values are expressed as a fraction of the total...

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10.17182/hepdata.89320.v1/t7

Measured WZ production cross sections computed separately in each of the flavour categories.

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10.17182/hepdata.89320.v1/t8

Measured fiducial cross sections and their corresponding uncertainties for each of the individual flavour categories, as well as for the...

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10.17182/hepdata.89320.v1/t9

Differential cross section in bins of pT(leading jet). Values are expressed as a fraction of the total cross section. The...

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10.17182/hepdata.89320.v1/t10

Expected and observed yields for each of the relevant processes and flavour categories. Combined statistical and systematic uncertainties are shown...

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10.17182/hepdata.89320.v1/t11

Differential cross section in bins of pT(leading jet). Values are expressed as a fraction of the total cross section. The...

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10.17182/hepdata.89320.v1/t12

Summary of the total postfit impact of each uncertainty source on the uncertainty in the signal strength measurement, for the...

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10.17182/hepdata.89320.v1/t13

Efficiencies estimated as transfer factors from the fiducial region to the signal region using generator-level information, for an integrated luminosity...

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10.17182/hepdata.89320.v1/t14

Measured WZ production cross section computed in the inclusive final state and split by W boson charge, and asymmetry ratio.

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