{"id":"9439a474-6a1d-4092-bfda-7f2942f2fcc7","arxiv_id":"2606.29690","paper_version":1,"verdict":"UNVERDICTED","confidence":"LOW","novelty_score":5.0,"correctness_risk":"medium","formal_verification":"none","parameter_count":1,"one_line_summary":"CLAS12 data at Q² up to 10.4 GeV², analyzed with an extended ANL-Osaka model, shows consistency with CJ15 QCD predictions for cross sections, F2, and truncated moments, supporting local and global duality at higher Q².","lead":"This paper uses new CLAS12 measurements of electron-proton scattering to test quark-hadron duality up to Q² of about 10 GeV². It extends an existing coupled-channels model to match the data and compares extracted structure functions and moments against a global QCD fit.","discovery_kind":"extension","skeptic_critique":{"model":"grok-4.3","headline":"Model dependence of L-T decomposition via phenomenological ANL-Osaka extension is the least secure step in the duality test","rationale":"The reader's weakest assumption matches the load-bearing step exactly. The abstract makes clear that the extraction pipeline is model-mediated, so the concern is internal to the argument rather than external. Full-text details on fit quality, parameter count, and validation against independent observables would be needed to decide whether the extension is sufficiently constrained, but the methodological dependence itself is the single most load-bearing point.","tokens_in":1902,"tokens_out":388,"duration_ms":21559,"concrete_test":"Recompute F2(W,Q²) and the first few truncated moments using an independent L-T separation (e.g., a Rosenbluth-style global fit to world inclusive data or an alternative resonance parameterization such as MAID or a simple dipole-based model) on the same CLAS12 kinematics; if the resulting moments deviate from CJ15 by more than the quoted uncertainties in the resonance region, the duality evidence is model-dependent.","verdict_should_be":"CONDITIONAL","load_bearing_attack":"The central claim of quantitative evidence for local and global duality rests on extracted F2(W,Q²) and W-truncated moments M2(Q²) being consistent with CJ15 (including TMC and HT corrections). These quantities are obtained from measured cross sections only after applying a high-Q² phenomenological extension of the ANL-Osaka dynamical coupled-channels model, anchored at Q0²=2.774 GeV² and constrained by the CLAS12 data. The extension supplies the longitudinal-transverse separation; any residual inaccuracy in the multi-meson channels or in the treatment of the pion threshold (explicitly noted in the abstract) would propagate directly into F2 and the moments, making the observed consistency at least partly dependent on the model's fidelity rather than an independent data-driven test.","agreement_with_reader":"agree"},"referee_report":{"model":"grok-4.3","summary":"The manuscript presents a high-precision study of quark-hadron duality in inclusive electron-proton scattering using CLAS12 data spanning 2.55 ≤ Q² ≤ 10.4 GeV². A phenomenological high-Q² extension of the Argonne-Osaka dynamical coupled-channels model is developed, anchored at Q₀²=2.774 GeV² and constrained by the measured cross sections, to enable longitudinal-transverse decomposition, extraction of F₂(W,Q²), and evaluation of W-truncated Cornwall-Norton moments M₂(Q²). These quantities are compared to the CJ15 global QCD analysis (including target-mass and higher-twist corrections), with reported consistency interpreted as quantitative evidence for both local and global duality at higher Q² than previously explored. The work also identifies a threshold effect in the partonic calculation and notes the role of multi-meson channels in the resonance region.","tokens_in":2122,"tokens_out":639,"duration_ms":29428,"significance":"If the robustness of the high-Q² extension can be established, the results would extend quantitative tests of quark-hadron duality to a new kinematic domain, with multi-level comparisons (cross sections, F₂, and moments) providing a stronger test than single-observable studies. The explicit discussion of the pion-production threshold mismatch and the necessity of multi-meson channels for duality offers mechanistic insight that could inform future modeling.","major_comments":[{"comment":"High-Q² extension section: the phenomenological extension is anchored at Q₀²=2.774 GeV² and explicitly constrained by the same CLAS12 cross-section data used to test duality via the CJ15 comparison. This setup makes the reported consistency at least partly dependent on the model fit rather than constituting an independent data-driven test of duality.","section":"High-Q² extension section"},{"comment":"L-T decomposition and F₂ extraction: the central claim of quantitative evidence for duality rests on the extracted F₂(W,Q²) and M₂(Q²) being consistent with CJ15, yet the manuscript provides no quantitative assessment of uncertainties in the longitudinal-transverse separation, fit quality of the extension, or sensitivity to assumptions in the multi-meson channels and pion threshold.","section":"L-T decomposition and F₂ extraction"},{"comment":"Comparison with CJ15 section: consistency is asserted at the cross-section, structure-function, and truncated-moment levels, but without reported χ² values, uncertainty bands on the differences, or explicit propagation of model uncertainties from the ANL-Osaka extension, the strength of the evidence for duality cannot be evaluated.","section":"Comparison with CJ15 section"}],"minor_comments":[{"comment":"The abstract notes that the single-pion channel underestimates the inclusive strength above the Δ(1232) and that multi-meson channels carry the remainder, but a quantitative breakdown of channel contributions at the highest Q² would strengthen this supporting observation.","section":null}],"recommendation":"major_revision","confidential_remarks":null},"author_rebuttal":{"model":"grok-4.3","summary":"We thank the referee for the careful and constructive review. We address each major comment below and indicate the revisions we will make to strengthen the manuscript.","responses":[{"response":"We agree that agreement at the cross-section level is influenced by the model constraint to the data. However, the primary duality test occurs at the extracted F₂(W,Q²) and truncated moments M₂(Q²), which are compared to the independent CJ15 global QCD analysis (not fitted to these CLAS12 data). The extension enables the L-T decomposition required for F₂ but does not dictate the CJ15 comparison. We will revise the text to explicitly distinguish the cross-section fit from the independent structure-function and moment tests.","revision_made":"partial","referee_comment":"[High-Q² extension section] the phenomenological extension is anchored at Q₀²=2.774 GeV² and explicitly constrained by the same CLAS12 cross-section data used to test duality via the CJ15 comparison. This setup makes the reported consistency at least partly dependent on the model fit rather than constituting an independent data-driven test of duality."},{"response":"This is a fair criticism. In the revision we will add the χ² per degree of freedom for the high-Q² extension fit, quantitative uncertainty estimates for the L-T separation obtained from model-parameter variations, and sensitivity studies addressing the multi-meson channel assumptions and pion-threshold treatment.","revision_made":"yes","referee_comment":"[L-T decomposition and F₂ extraction] the central claim of quantitative evidence for duality rests on the extracted F₂(W,Q²) and M₂(Q²) being consistent with CJ15, yet the manuscript provides no quantitative assessment of uncertainties in the longitudinal-transverse separation, fit quality of the extension, or sensitivity to assumptions in the multi-meson channels and pion threshold."},{"response":"We accept that quantitative metrics are needed. We will include χ² values for the relevant comparisons, overlay uncertainty bands on the differences between our results and CJ15, and propagate the ANL-Osaka extension uncertainties to the extracted F₂ and moments. These additions will allow a more rigorous assessment of the duality evidence.","revision_made":"yes","referee_comment":"[Comparison with CJ15 section] consistency is asserted at the cross-section, structure-function, and truncated-moment levels, but without reported χ² values, uncertainty bands on the differences, or explicit propagation of model uncertainties from the ANL-Osaka extension, the strength of the evidence for duality cannot be evaluated."}],"tokens_in":1730,"tokens_out":553,"duration_ms":24057,"standing_objections":[]},"desk_editor":{"model":"grok-4.3","letter":"The main point is that this analysis takes CLAS12 cross sections up to Q²=10.4 GeV² in the resonance region, extends the ANL-Osaka coupled-channels model phenomenologically, extracts F2 and W-truncated moments, and reports reasonable agreement with the CJ15 global fit after target-mass and higher-twist corrections.\n\nWhat the work actually adds is the higher-Q² data set itself plus the model extension anchored at Q0²=2.774 GeV² and adjusted to the measured cross sections. This lets them do the longitudinal-transverse separation, compute F2(W,Q²), and evaluate the moments. They also note that single-pion channels underpredict the strength above the Delta and that multi-meson channels carry most of it, plus a mismatch at the pion threshold in the partonic side that accounts for some difference in the first resonance region.\n\nThe data and the multi-observable comparison are the solid parts. The consistency appears at cross-section, structure-function, and moment levels.\n\nThe soft spot is the model dependence. The L-T decomposition and therefore F2 and the moments come from the tuned extension constrained by the same CLAS12 data used for the duality test. That introduces some circularity, and the abstract gives no numbers on fit quality, error propagation, or sensitivity to the extension parameters. The stress-test concern about residual inaccuracy in multi-meson channels or threshold treatment is real and needs checking in the full text.\n\nThis is for people working on nucleon structure functions, resonance models, or the hadronic-to-partonic transition. A reader focused on global QCD fits or higher-twist effects would get something concrete from the moment comparison. It deserves peer review because the kinematics are new and the test is quantitative, even if the model step requires scrutiny.","headline":"The paper extends duality tests to Q²~10 GeV² with new CLAS12 data but the L-T separation rests on a data-tuned model extension, so the consistency with CJ15 is not fully independent.","tokens_in":2627,"tokens_out":458,"would_cite":false,"duration_ms":20819,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"grok-4.3","headline":"CLAS12 data confirm quark-hadron duality holds in the resonance region up to Q² of 10 GeV² through matching structure functions and moments.","keywords":["quark-hadron duality","electron-proton scattering","CLAS12","nucleon structure functions","Cornwall-Norton moments","resonance region","higher-twist corrections","coupled-channels model"],"falsifier":"A new measurement at Q² near 10 GeV² that shows the CLAS12-extracted truncated moments deviating from the CJ15 predictions by more than the combined experimental and higher-twist uncertainties.","tokens_in":2832,"feed_emoji":"","tokens_out":812,"duration_ms":19721,"temperature":0.7,"pith_summary":"The paper shows that inclusive electron-proton cross sections measured by CLAS12 at Q² from 2.55 to 10.4 GeV² agree with expectations from a global QCD fit once target-mass and higher-twist corrections are included. This agreement appears both in the extracted proton structure function F2(W,Q²) and in its W-truncated Cornwall-Norton moments, giving quantitative support for local duality inside individual resonances and global duality across the resonance region. The work develops a high-Q² extension of a dynamical coupled-channels model to perform the longitudinal-transverse separation needed for this comparison. A residual mismatch in the lowest resonance region is traced to the partonic calculation lacking an explicit pion-production threshold rather than to a failure of duality itself.","feed_headline":"CLAS12 data show quark-hadron duality persists to 10 GeV²","feed_subtitle":"Resonance-region cross sections and extracted moments match perturbative QCD fits including target-mass and higher-twist terms.","key_machinery":"The W-truncated Cornwall-Norton moments M2(Q²) of the structure function F2(W,Q²), obtained after an ANL-Osaka-constrained longitudinal-transverse decomposition of the measured cross sections.","core_discovery":"The central claim is that inclusive electron-proton scattering data in the nucleon resonance region up to Q² ≈ 10 GeV² exhibit both local and global quark-hadron duality, as evidenced by the agreement between the measured cross sections, extracted F2(W,Q²), and W-truncated Cornwall-Norton moments M2(Q²) with the CJ15 global QCD analysis including target-mass and higher-twist corrections. The study develops a high-Q² extension of the ANL-Osaka dynamical coupled-channels model to enable this comparison, revealing that multi-meson channels are essential for the resonance strength above the Delta(1232), and that a threshold effect in the partonic calculation explains residual discrepancies rathe","pith_inferences":["Resonance-region data at these Q² values could be folded into global fits to tighten constraints on higher-twist coefficients.","The threshold mismatch points to a calculational improvement that would be worth testing in other kinematic regimes where duality is examined.","If the same model extension works at still higher Q², it could map the Q² range over which duality remains valid."],"forward_implications":["Duality can be tested quantitatively at momentum transfers several times larger than in earlier experiments.","Multi-meson final states must be included to reproduce the full resonance-region strength required by duality.","The partonic calculation must incorporate the physical pion-production threshold to remove the remaining discrepancy in the first resonance region.","Consistency across cross sections, structure functions, and moments strengthens the case for using resonance data to constrain higher-twist terms."],"fun_headline_variants":["CLAS12 extends duality test to 10 GeV²","Resonance moments match QCD at high Q²","Duality holds in CLAS12 F2 up to 10 GeV²","High Q² data confirm local and global duality"],"cache_read_input_tokens":2112,"weakest_assumption_plain":"The high-Q² extension of the coupled-channels model, fitted to the new cross-section data, produces an unbiased extraction of F2 and the moments.","fun_headline_variants_meta":{"raw":{"variants":["CLAS12 extends duality test to 10 GeV²","Resonance moments match QCD at high Q²","Duality holds in CLAS12 F2 up to 10 GeV²","High Q² data confirm local and global duality"]},"model":"grok-4.3","cost_usd":0.004705,"raw_usage":{"total_tokens":2357,"prompt_tokens":896,"num_sources_used":0,"completion_tokens":67,"cost_in_usd_ticks":47053000,"prompt_tokens_details":{"text_tokens":896,"audio_tokens":0,"image_tokens":0,"cached_tokens":64},"completion_tokens_details":{"audio_tokens":0,"reasoning_tokens":1394,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"tokens_in":896,"tokens_out":67,"duration_ms":6734,"temperature":1.0,"reasoning_tokens":1394,"cache_read_input_tokens":64,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-06-30T05:51:05.206003+00:00","model_set":{"reader":"grok-4.3"},"falsifier":"A new measurement at Q² near 10 GeV² that shows the CLAS12-extracted truncated moments deviating from the CJ15 predictions by more than the combined experimental and higher-twist uncertainties.","supporting_citations":[],"review_version":1}