Recognition: no theorem link
Search for signatures of electroweakinos with photons, jets, and large missing transverse momentum in sqrt{s}=13 TeV pp collisions with the ATLAS detector
Pith reviewed 2026-05-17 05:06 UTC · model grok-4.3
The pith
No excess is observed in the search for electroweakino signatures with photons, jets and missing momentum, excluding gaugino masses up to 1.2 TeV in gauge-mediated supersymmetry models.
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
Core claim
In gauge-mediated supersymmetric models a pair of mixed bino-higgsino neutralinos can be produced and decay such that one yields a photon and gravitino while the other yields a Higgs boson, Z boson or photon plus gravitino. Analysis of the full Run-2 ATLAS dataset shows no significant excess over Standard Model backgrounds, permitting exclusion of gaugino masses up to 1.2 TeV depending on branching ratios at 95 percent confidence level.
What carries the argument
Event selection requiring an isolated high-pT photon, multiple jets and large missing transverse momentum, followed by comparison to Standard Model predictions and interpretation within gauge-mediated supersymmetry breaking models.
Load-bearing premise
The exclusion limits rely on the specific branching ratios and production cross sections assumed in the gauge-mediated supersymmetry breaking models under consideration.
What would settle it
Observation of a statistically significant excess of events with the predicted characteristics at gaugino masses below the excluded range would contradict the no-excess result and the derived limits.
read the original abstract
A search for final states characterised by at least one isolated high transverse-momentum photon, jets and large missing transverse momentum is presented. Such a final state might occur in gauge-mediated supersymmetric models where a pair of binos and higgsinos mix to form neutralinos, one of which decays into a photon plus a gravitino while the other decays into a Higgs boson, a Z boson or a photon, plus a gravitino. The search is performed using the full Run-2 data sample of 140 fb$^{-1}$ of $\sqrt{s}=13$ TeV proton-proton collisions collected by the ATLAS detector at the Large Hadron Collider. No significant excess of events is observed above the Standard Model prediction and model-dependent exclusion limits at the 95% confidence level are set. These limits are interpreted in terms of the masses of gauginos, which are excluded up to 1.2 TeV depending on their branching ratios, and on their branching ratios as a function of their mass.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The manuscript reports a search for electroweakino production in gauge-mediated supersymmetry breaking models at the ATLAS detector. Using the full Run-2 dataset of 140 fb^{-1} at 13 TeV, the analysis targets final states with at least one isolated high-pT photon, jets, and large missing transverse momentum, corresponding to neutralino decays to photon + gravitino or Higgs/Z + gravitino. No significant excess above Standard Model backgrounds is observed, and 95% CL model-dependent exclusion limits are set on gaugino masses up to 1.2 TeV, with additional limits on branching ratios as a function of mass.
Significance. If the result holds, the analysis provides competitive constraints on supersymmetric parameter space in GMSB scenarios with specific neutralino decay modes. It employs standard ATLAS procedures for background estimation, object identification, and statistical limit setting on a large dataset, with explicit acknowledgment of model dependence. This strengthens previous exclusions and contributes to the broader program of electroweakino searches at the LHC.
minor comments (2)
- [Abstract] Abstract: the phrase 'depending on their branching ratios' is used without quantifying the range of branching fractions considered in the interpretation; a brief parenthetical note would improve clarity for readers.
- [Event selection] The manuscript would benefit from an explicit table in the event selection section summarizing the photon, jet, and MET requirements along with the signal region definitions.
Simulated Author's Rebuttal
We thank the referee for their review of our manuscript and for recommending minor revision. The referee's summary accurately reflects the scope of our search for electroweakino production in gauge-mediated supersymmetry breaking models using the full Run-2 ATLAS dataset, and we appreciate the acknowledgment of the competitive constraints obtained.
read point-by-point responses
-
Referee: No major comments provided in the report.
Authors: We are pleased that the referee finds the analysis to employ standard ATLAS procedures and to provide competitive limits on GMSB scenarios with the specified neutralino decay modes. Since no specific major comments were raised, no substantive changes to the scientific content are required. We will address any minor editorial or formatting points in the revised version. revision: no
Circularity Check
No circularity: standard experimental limit-setting on external simulations
full rationale
The paper reports a direct search for new physics signatures in 140 fb^{-1} of ATLAS data. It compares observed events in a photon + jets + MET final state against Standard Model background predictions from Monte Carlo simulations and sets 95% CL exclusion limits on gaugino masses in specific GMSB models. No derivation step reduces to a fitted parameter by construction, no self-citation chain bears the central claim, and the null result plus model-dependent limits are obtained via standard statistical procedures against independent external inputs. The analysis is self-contained against external benchmarks.
Axiom & Free-Parameter Ledger
axioms (2)
- domain assumption Standard Model processes accurately predict the background rates and shapes in the signal region after selection cuts.
- domain assumption The gauge-mediated supersymmetry breaking model correctly describes the production and decay branching ratios of the electroweakinos.
invented entities (1)
-
Gravitino
no independent evidence
Reference graph
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discussion (0)
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