Abstract
Despite the absence of experimental evidence, the weak scale supersymmetry remains as one of the best motivated and studied theoretical models beyond the Standard Model. This article summarises recent ATLAS results on inclusive searches for squarks and gluinos in R-parity conserving SUSY scenarios, including third generation squarks produced in the decay of gluinos. The searches involve final states containing jets, missing transverse momentum with and without a light lepton. No significance excess above the Standard Model prediction is observed and exclusion limits are set on 2-dimensional mass planes of benchmark signal models.
Highlights
Supersymmetry (SUSY) [1,2,3,4,5,6] is one of well-motivated Standard Model (SM) extensions, and it predicts new bosonic partners for the fermions and new fermionic partners for the bosons of the Standard Model
The one-step decay predicted in a scenario of the phenomenological Minimal Supersymmetric Standard Model [14, 15] has high jetmultiplicity caused by the decays of top quarks and other bosons appearing in the decay chains
Multi-bin fits over the signal regions defined to exclude the signals are performed, where the definitions of the Signal regions (SRs) are different from the SRs used in Figure 12 in order to maximise signal exclusion limit
Summary
Supersymmetry (SUSY) [1,2,3,4,5,6] is one of well-motivated Standard Model (SM) extensions, and it predicts new bosonic partners for the fermions and new fermionic partners for the bosons of the Standard Model. The ’0-lepton (2–6jets)’ analysis [9] is based on event topology with 2–6 jets, aiming at squarks or gluinos with direct or one-step decay via charginos. The ’0-lepton (7–11jets)’ analysis [13] is based on event topology with 7 or more jets, targeting gluino pair-production with one-step or two-step decay via charginos or the second lightest neutralinos (Figure 2). The last analysis is "multi-b" analysis [17], which is prepared for special cases of gluino direct decays that have many bottom quarks in final states as shown, and requires multi b-quark jets in the selection These signals are well-motivated because stop or sbottom mass could be relatively lighter than the other light-flavour squarks due to ’naturalness’ and gluino could decay via off-shell stop or sbottom to top or bottom quarks.
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