{"id":"a0e8b5f5-8293-40f8-abee-65b57dfec057","arxiv_id":"2603.18630","paper_version":2,"verdict":"ACCEPT","confidence":"HIGH","novelty_score":5.0,"correctness_risk":"low","formal_verification":"none","parameter_count":1,"one_line_summary":"Combined ATLAS VBS and triboson data constrain 17 Éboli-model dimension-8 Wilson coefficients for anomalous quartic gauge couplings, with and without unitarity bounds.","lead":"ATLAS combines seven vector-boson-scattering channels plus one triboson measurement from 140 fb⁻¹ of 13 TeV data to set joint limits on 17 dimension-8 Wilson coefficients that generate anomalous quartic gauge couplings. The result is the most complete ATLAS aQGC EFT interpretation to date and improves published single-channel bounds by up to 96 % once unitarity clipping is applied.","discovery_kind":"extension","skeptic_critique":{"model":"grok-4.5","headline":"No significant objection identified","rationale":"The paper is a carefully executed experimental combination whose strongest claim is fully supported by the documented statistical model, input adjustments, and unitarity/positivity overlays. The reader correctly identified the conventional dim-6 neglect as the softest modeling assumption and correctly judged it non-fatal. No stronger internal inconsistency, unhandled correlation, or unsubstantiated entity appears. The recommended concrete test is a straightforward robustness check that would settle residual bias without altering the present ACCEPT verdict. Agreement with the reader is complete; no verdict adjustment is warranted.","tokens_in":48507,"tokens_out":419,"duration_ms":4546,"concrete_test":"Re-fit the combined likelihood after injecting a residual dim-6 aTGC contribution at the current experimental upper bound (e.g., from dedicated ATLAS/CMS triple-gauge analyses) into the SM templates of the two highest-energy channels (VV-semileptonic and Z(\nu\nu)\\gamma jj); if any unitarized 95% CL interval in Table 2 shifts by more than ~10%, the neglect assumption would require a systematic uncertainty.","verdict_should_be":"UNCHANGED","load_bearing_attack":"The central claim (combined 68/95% CL intervals on the 17 Éboli coefficients, unitarized and non-unitarized, improving prior ATLAS results by 17–96%) rests on a transparent joint likelihood of seven VBS + one triboson channel, with documented handling of overlaps, correlations, clipping, and profiled multi-operator fits. The reader’s weakest assumption (setting residual dim-6 aTGC contributions to zero) is conventional, explicitly stated in the Introduction and §2, and does not introduce internal inconsistency or circularity. Minor technical choices (template replacement without final non-closure uncertainty, omission of OT3/OT4 for technical reasons) are quantified as percent-level and do not undermine the reported intervals. No load-bearing flaw that would reverse or substantially weaken the claim is present.","agreement_with_reader":"agree"},"referee_report":{"model":"grok-4.5","summary":"The ATLAS Collaboration combines seven vector-boson-scattering analyses and one tri-boson analysis (all based on 140 fb^{-1} of 13 TeV pp data) into a joint likelihood that constrains the 17 independent Wilson coefficients of the C-even, P-even dimension-8 operators of the Éboli basis that generate anomalous quartic gauge couplings. One- and two-dimensional 68 % and 95 % CL intervals are extracted both without unitarization and after energy-scale clipping that enforces partial-wave unitarity; positivity bounds are overlaid where available, and fully profiled simultaneous fits to all coefficients are also reported. The unitarized intervals improve the previously published ATLAS single-channel results by 17–96 % depending on the coefficient (Table 2).","tokens_in":48660,"tokens_out":753,"duration_ms":14807,"significance":"If the reported intervals hold, the work supplies the most comprehensive ATLAS aQGC EFT constraints to date and is competitive with the corresponding CMS combinations. The transparent construction of the joint likelihood (documented overlap removal, fully correlated experimental systematics, validated Wilks’ theorem within 5 %), the systematic treatment of unitarization via clipping, and the inclusion of profiled multi-operator fits make the results immediately usable for phenomenological reinterpretation. The quantification of template-replacement non-closure (percent-level) further increases confidence in the coverage of the full operator set.","major_comments":[],"minor_comments":[{"comment":"§3: The decision not to include the quantified template-replacement non-closure (up to 9 % on f_M1 and f_T9, widening intervals by at most 4 %) as a systematic uncertainty in the final results should be stated more prominently, ideally with a short sentence in the caption of Table 2 or Figure 2.","section":"§3"},{"comment":"Table 1 and §2: The exclusion of O_T3 and O_T4 is attributed solely to the unavailability of MadGraph implementations in the original publications; a one-sentence remark on whether these operators are expected to be redundant or weakly constrained by the present data set would help the reader.","section":"Table 1, §2"},{"comment":"Figure 2 (bottom panel) and Figure 3: The two illustrative values f = 1 and f = (4π)^2 used for the Λ reach are not defined in the text; a brief parenthetical explanation would improve readability.","section":"Figures 2–3"},{"comment":"§4: The statement that “the choice of correlation scheme \rho has negligible impact \rho changing by less than one percent” is useful; adding the extreme case (all systematics uncorrelated) as a parenthetical would make the claim fully self-contained.","section":"§4"},{"comment":"Throughout: Occasional typographic artefacts remain (e.g., “ORGANISA TION”, “Éboli” inconsistently accented, missing spaces around some equation numbers). A final proof-reading pass is recommended.","section":null}],"recommendation":"accept","confidential_remarks":"The manuscript is a high-quality, standard ATLAS combination paper that fits Phys. Lett. B well. No novelty or citation concerns; the dim-6 neglect is conventional and explicitly flagged. I see no reason to delay publication."},"author_rebuttal":null,"desk_editor":{"model":"grok-4.5","letter":"This is the cleanest ATLAS aQGC combination we have. They take seven published VBS analyses plus the Wγγ triboson result, build a joint likelihood with documented overlap removal and correlated systematics, and extract 68/95 % CL intervals on all 17 independent Éboli coefficients—both free and after unitarity clipping—plus the first simultaneous profiled fit. That is new numerical content that did not exist before; the unitarized numbers improve the prior ATLAS singles by 17–96 % depending on the operator (Table 2), and they are competitive with the latest CMS sets.\n\nWhat they do well is transparent and reproducible. Overlaps are handled (the WW control region is dropped), Wilks’ theorem is checked against toys to 5 %, template replacement for missing operators is quantified (≤9 % non-closure, ≤4 % after uncertainty), and both linear/quadratic/cross terms are simulated. The clipping scan versus energy threshold is shown explicitly, so anyone can see where unitarity bites. Positivity bounds are overlaid where they matter. The citation trail to the input papers and to the Éboli/unitarity literature is complete.\n\nSoft spots are minor and conventional. Residual dimension-6 aTGC contributions are set to zero; that is standard in this literature and stated up front, but it remains an assumption. OT3 and OT4 are omitted for technical reasons, and the final non-closure uncertainty on the template swap is not floated. None of these moves the central intervals by more than a few percent. The paper does not invent a new technique or resolve a theoretical puzzle; it is a high-quality experimental constraint product.\n\nAnyone building BSM models that generate aQGCs, or anyone preparing the next Run-3 combination, will use these numbers. It deserves a serious referee and should be accepted after the usual technical polishing. I would cite the unitarized and profiled tables myself.","headline":"Solid ATLAS combination that delivers the first uniform 17-operator aQGC limits (unitarized and profiled) from seven VBS + one triboson channel; improvements of 17–96 % are real and usable.","tokens_in":49258,"tokens_out":489,"would_cite":true,"duration_ms":6486,"reading_group":"yes","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"grok-4.5","headline":"Combining ATLAS vector-boson scattering and triboson data tightens limits on anomalous quartic gauge couplings from dimension-8 operators.","keywords":["anomalous quartic gauge couplings","dimension-8 EFT","Éboli operators","vector-boson scattering","triboson production","ATLAS","Wilson coefficients","unitarity bounds"],"falsifier":"A future global electroweak fit that finds a non-zero dimension-6 coefficient large enough to produce a measurable shift in any of the high-energy VBS or triboson distributions used here would bias or invalidate the reported dimension-8 intervals.","tokens_in":49380,"feed_emoji":"⚛️","tokens_out":608,"duration_ms":5757,"temperature":0.7,"pith_summary":"This paper combines seven vector-boson scattering measurements and one triboson measurement, all using the full ATLAS Run-2 data set, into a single likelihood that constrains anomalous quartic electroweak gauge-boson couplings. Those couplings are parameterised by seventeen independent Wilson coefficients of dimension-8 operators in the Éboli effective-field-theory model. The combination produces 68 % and 95 % confidence intervals for each coefficient (and for selected pairs) both without and with unitarity constraints imposed by an energy-clipping procedure. The resulting unitarised intervals improve upon previously published ATLAS results by 17–96 % depending on the operator, and they remain competitive with analogous CMS limits. Simultaneous profiled fits that float all coefficients at once are also provided so that phenomenological models predicting correlated shifts can be tested directly.","feed_headline":"ATLAS tightens limits on anomalous quartic gauge couplings","feed_subtitle":"Combined VBS and triboson data improve unitarised Wilson-coefficient intervals by up to 96 percent","key_machinery":"The combined profile-likelihood constructed from the individual analysis likelihoods, with nuisance parameters correlated where they share a common experimental origin and with EFT signal templates (linear, quadratic and cross terms) added to the SM prediction; unitarity is enforced by clipping the high-energy EFT contribution above a variable energy threshold and taking the intersection with theoretical unitarity bounds.","core_discovery":"A joint likelihood built from seven VBS final states and one Wγγ triboson measurement yields the most comprehensive set of ATLAS constraints to date on the seventeen independent Éboli dimension-8 Wilson coefficients, with unitarised 95 % CL intervals that improve earlier ATLAS publications by up to 96 %.","pith_inferences":[],"forward_implications":[],"fun_headline_variants":["ATLAS VBS plus triboson data tighten Eboli dim-8 Wilson bounds","Joint seven-VBS and Wγγ likelihood constrains 17 quartic operators","Unitarised 95% CL intervals improve earlier ATLAS limits by 96%","Combined ATLAS EFT fit yields strongest anomalous QGC constraints","Profiled Wilson-coefficient limits from ATLAS VBS and triboson data"],"cache_read_input_tokens":32896,"weakest_assumption_plain":"Dimension-6 operators that can feed into the same final states through triple-gauge vertices are assumed already so tightly constrained that their residual effects can be set to zero.","fun_headline_variants_meta":{"raw":{"variants":["ATLAS VBS plus triboson data tighten Eboli dim-8 Wilson bounds","Joint seven-VBS and Wγγ likelihood constrains 17 quartic operators","Unitarised 95% CL intervals improve earlier ATLAS limits by 96%","Combined ATLAS EFT fit yields strongest anomalous QGC constraints","Profiled Wilson-coefficient limits from ATLAS VBS and triboson data"]},"model":"grok-4.5","effort":"low","cost_usd":0.00532,"raw_usage":{"total_tokens":1386,"prompt_tokens":701,"num_sources_used":0,"completion_tokens":87,"cost_in_usd_ticks":53200000,"prompt_tokens_details":{"text_tokens":701,"audio_tokens":0,"image_tokens":0,"cached_tokens":128},"completion_tokens_details":{"audio_tokens":0,"reasoning_tokens":598,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"tokens_in":701,"tokens_out":87,"duration_ms":5354,"temperature":1.0,"reasoning_tokens":598,"cache_read_input_tokens":128,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-07-15T11:53:33.775831+00:00","model_set":{"reader":"grok-4.5"},"falsifier":"A future global electroweak fit that finds a non-zero dimension-6 coefficient large enough to produce a measurable shift in any of the high-energy VBS or triboson distributions used here would bias or invalidate the reported dimension-8 intervals.","supporting_citations":[],"review_version":2}