{"id":"a8772811-90b5-4a19-bb99-2c193de4cc52","arxiv_id":"2508.14861","paper_version":1,"verdict":"UNVERDICTED","confidence":"LOW","novelty_score":4.0,"correctness_risk":"unknown","formal_verification":"none","parameter_count":0,"one_line_summary":"It computes greybody factors, strong-field light deflection, relativistic image positions, and shadow radius for a Lorentz-violating global monopole black hole, as functions of the LV parameter and monopole charge.","lead":"This paper reports calculations of how two kinds of elementary particles behave near a black hole with an unusual structure that slightly breaks a basic symmetry of spacetime, and how that black hole bends light and appears as a shadow. The abstract says the amount of symmetry breaking and the strength of the structure change these signals, which could give astronomers a way to test this theory.","discovery_kind":"extension","skeptic_critique":{"model":"deepseek-v4-flash","headline":"Central claim is unsupported by the supplied manuscript: the body is an unrelated cond-mat paper, so no greybody, lensing, or shadow derivation exists to check.","rationale":"The reader's UNVERDICTED verdict is appropriate, but the most load-bearing concern is not only the technical separability of the Rarita-Schwinger equation; it is that the supplied manuscript contains no relevant derivation at all. The body is a different arXiv preprint, so the abstract's claims are unsupported by any in-scope evidence. This is an explicit missing-support flag, not a manufactured physics objection. Even if the correct body were retrieved, the reader's flagged assumption about Rarita-Schwinger separability and consistency would remain a nontrivial precondition for the greybody-factor part of the claim. Since no derivation is available, the physics cannot be assessed; this does not change the reader's UNVERDICTED verdict. I do not see evidence of intentional misconduct; the finding is one of insufficient information.","tokens_in":3751,"tokens_out":5000,"duration_ms":55128,"concrete_test":"Obtain the actual full text of arXiv:2508.14861 (with the correct body). From the resulting metric, independently attempt the separation of the Rarita-Schwinger equation: substitute the standard spin-3/2 ansatz into the full field system including its constraints. If the angular equation has a nontrivial solution only for special parameter values, or if the constraints force the LV parameter to zero, the abstract's central claim fails. If the body remains the unrelated chiral-active-matter paper, the claim is unverified and the UNVERDICTED status stands.","verdict_should_be":"UNCHANGED","load_bearing_attack":"The central claim is that fermionic greybody factors, strong-field lensing observables, and shadows are computed for a Lorentz-violating global monopole black hole in self-interacting Kalb-Ramond gravity. The supplied full text is arXiv:2508.14862, 'Area swept and winding angle of chiral active particles,' which contains none of the metric, field equations, separation ansatz, effective potentials, deflection integrals, or shadow formulas named in the abstract. Under the review rule that all manuscript text is in-scope evidence, this is an explicit missing-support flag: every substantive assertion in the abstract is unattested. The abstract's weakest physical step is the assertion that Dirac and Rarita-Schwinger equations are 'separating these equations into sets of radial and angular equations' with an 'analytical solution of the angular equation.' For spin 3/2 in curved spacetime, separability is not generic: the Rarita-Schwinger field has constraint equations whose consistency may restrict the background or require special algebraic conditions. If the separation imposes extra constraints on the LV parameter or monopole charge, the claimed Schrodinger-like potentials and greybody factors do not follow. Because the body does not show even the metric, this step cannot currently be checked.","agreement_with_reader":"partial"},"referee_report":{"model":"deepseek-v4-flash","summary":"The manuscript, arXiv:2508.14861, presents an abstract announcing a study of fermionic greybody factors, strong-field gravitational lensing, relativistic image positions and magnifications, and shadow observables for a black hole with a global monopole in self-interacting Kalb-Ramond gravity with Lorentz violation. The claimed method is separation of the Dirac and Rarita-Schwinger equations into radial and angular parts, analytic solution of the angular equation, and derivation of Schrödinger-like radial equations in a tortoise coordinate. The supplied full text, however, is the body of a different arXiv preprint, arXiv:2508.14862, titled 'Area swept and winding angle of chiral active particles,' by different authors, on chiral active matter. That text contains none of the metric, field equations, separation ansatz, effective potentials, deflection integrals, or shadow formulas announced in the abstract. As submitted, no part of the claimed derivation is available for inspection.","tokens_in":3868,"tokens_out":2193,"duration_ms":27684,"significance":"If the announced results were correct and fully derived, they would provide a concrete family of gravitational observables (greybody factors, relativistic image positions and magnifications, and shadow boundaries) depending on the Lorentz-violating parameter and the global monopole charge, extending the standard global monopole and Schwarzschild results. Such results could in principle be used to constrain Lorentz violation with black hole observations. However, the current document contains no derivations, no equations beyond those of the unrelated active-matter preprint, and no quantitative predictions that can be checked. The only significant methodological point that can be assessed from the abstract is the nontrivial nature of Rarita-Schwinger separability in curved spacetime, which is asserted without supporting evidence. No machine-checked proofs, reproducible code, or independently checkable formulas are present.","major_comments":[{"comment":"The entire body of the submitted manuscript is a different paper (arXiv:2508.14862) on chiral active particles by I. Santra, U. Basu, and S. Sabhapandit. It does not contain the metric of the Lorentz-violating global monopole, the Kalb-Ramond field equations, the Dirac or Rarita-Schwinger equations in this background, any separation of variables, any effective potential, any deflection integral, or any shadow formula. Every substantive claim in the abstract—fermionic greybody factors, strong-field deflection, relativistic image positions and magnifications, shadow size and its dependence on the LV parameter and monopole charge—is therefore unsupported by the supplied document. This is a load-bearing missing-support issue and cannot be remedied by minor editing.","section":"Abstract / Full text"},{"comment":"The abstract asserts that the Dirac and Rarita-Schwinger equations are separated into radial and angular equations and that the angular equation is solved analytically. For a spin-3/2 Rarita-Schwinger field in curved spacetime, separability is not generic: the field obeys constraint equations whose consistency can impose nontrivial conditions on the background or require special algebraic structures. The submitted text provides no metric, no gauge choice, and no demonstration that such a separation is possible for this particular Lorentz-violating global monopole spacetime. Without that, the claimed Schrödinger-like potentials and greybody factors do not follow. This is the key physical precondition of the announced derivation and it is entirely unchecked.","section":"Abstract, spin-3/2 separability"},{"comment":"Even at the level of the abstract, the objects named (greybody factors, angular deflection in the strong-field limit, positions and magnifications of relativistic images, shadow of the black hole) are not defined by any displayed equations, and no comparison is made with the known Schwarzschild or global-monopole limits. Consequently the paper gives the reader no way to verify the claimed functional dependence on the Lorentz-violating parameter and monopole charge, nor to assess whether the results reduce correctly in the standard limits. This absence of all technical content is a central failure of the submission, not a presentation issue.","section":"Abstract, observables and definitions"}],"minor_comments":[{"comment":"The arXiv listing (title, abstract, and claimed subject) does not match the authors and title of the supplied body. The manuscript must be associated with the correct full text if it is to be evaluated at all.","section":"Metadata / title page"},{"comment":"The reference list in the supplied body concerns active Brownian particles, run-and-tumble motion, and related stochastic processes; it contains none of the expected references to Kalb-Ramond gravity, global monopoles, greybody factors, or strong-field lensing. This is consistent with the body being a different paper and should be resolved before any further review.","section":"References"}],"recommendation":"reject","confidential_remarks":"The submission appears to have been made with the wrong full text attached; the correct handling would normally be to return it as incomplete. For the journal record, however, the present document cannot be reviewed as a gr-qc paper: the abstract claims a complete derivation and a set of observables, yet the body supplies none of the prerequisite equations. A rejection, with the possibility of resubmission once the intended manuscript is provided in full, seems appropriate."},"author_rebuttal":null,"desk_editor":{"model":"deepseek-v4-flash","letter":"The supplied manuscript is broken. The abstract advertises a gr-qc computation for a Lorentz-violating global monopole in self-interacting Kalb-Ramond gravity: spin-1/2 and spin-3/2 fermionic greybody factors, strong-field deflection, relativistic images, and shadows. The full text is arXiv:2508.14862, a paper on chiral active particles. There is no metric, no field equations, no separation ansatz, no effective potentials, no deflection integral, no shadow formula. Under the rule that everything in the manuscript counts as evidence, the central claim is unsupported in the strongest possible sense: the derivation is simply absent.\n\nWhat the abstract describes is a legitimate and fairly routine exercise, a new instance of an established computational program. If the authors actually did the calculation, it would be a useful catalogue entry for this particular background. The one genuinely nontrivial step they flag is the separation of the Dirac and Rarita-Schwinger equations. For spin 3/2 in curved spacetime, separability is not automatic; constraints can restrict the background or introduce extra conditions. That is the right thing to worry about, and it would be the first place I would look if I had the actual paper.\n\nBut I do not have the actual paper. The body text is not just missing a few sections; it is an unrelated manuscript. The abstract-level claims cannot be checked, the mathematics cannot be inspected, and there is no code or data to reproduce. The reader's UNVERDICTED verdict is the right call, though I would go a step further: this submission should not be sent to peer review as-is. A referee cannot evaluate what is not there.\n\nFor whom would this paper be useful? Anyone tracking black-hole observables in modified gravity, especially Lorentz-violating extensions, would probably want to know the numbers if they are correct. But that is exactly what cannot be determined here. The authors should be told to resubmit the correct file; then it can be judged on its merits. As it stands, the only honest recommendation is to return it without review. If a correct version appears later, I would take another look, and the Rarita-Schwinger separation is the point I would press hardest.","headline":"The submission is not reviewable: the body is a different cond-mat paper, so none of the abstract's claims about fermionic greybody factors, lensing, or shadows have any support in the document.","tokens_in":4505,"tokens_out":1314,"would_cite":false,"duration_ms":16810,"reading_group":"no","serious_thinker":"unclear","would_accept_peer_review":false},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"deepseek-v4-flash","headline":"A Lorentz-violating global-monopole black hole yields calculable fermion greybody factors, relativistic-image positions, and shadows as functions of the LV parameter and monopole charge.","keywords":["greybody factors","Dirac equation","Rarita-Schwinger equation","global monopole","Lorentz violation","Kalb-Ramond gravity","strong gravitational lensing","black hole shadow"],"falsifier":"Pick a fixed value of the LV parameter and monopole charge, numerically integrate the separated radial equations, and check whether the resulting greybody factors and shadow radius reproduce the known Schwarzschild/global-monopole limits when the LV parameter is sent to zero; independently, impose the Rarita-Schwinger constraint equations in this metric and see whether they require an algebraic condition not used in the paper. If the constraints fail, the angular solution cannot describe a propagating spin-3/2 mode.","tokens_in":3536,"feed_emoji":"🕳️","tokens_out":6636,"duration_ms":74269,"temperature":0.7,"pith_summary":"This paper sets out a complete set of observational signatures for a black hole whose spacetime is modified in two ways at once: it carries a global monopole, and it lives in a self-interacting Kalb-Ramond gravity theory that breaks Lorentz symmetry. The authors derive greybody factors for spin-1/2 and spin-3/2 fermions by separating the Dirac and Rarita-Schwinger equations and solving the angular part analytically, then use the tortoise coordinate to turn the radial equations into Schrödinger-like barrier problems. In the same background they compute the strong-field bending of light, the positions and magnifications of the resulting relativistic images, and the black-hole shadow. The payoff is that every one of these observables becomes an explicit function of the Lorentz-violating parameter and the monopole charge, so the model produces quantitative predictions that can be compared with black-hole observations.","feed_headline":"Spin-1/2 and spin-3/2 waves map a Lorentz-violating black hole","feed_subtitle":"Fermion greybody factors and lensing images depend on the LV parameter and monopole charge.","key_machinery":"Separability of the spinor equations is the load-bearing device: analytical solutions of the angular part of the Dirac and Rarita-Schwinger equations in the LV monopole background allow the radial equations to be decoupled using the tortoise coordinate. The resulting one-dimensional Schrödinger-like potentials directly yield the greybody factors. On the photon side, the strong-deflection-limit expansion of the bending angle is the machine that converts the metric into observable image positions, magnifications, and the shadow silhouette.","core_discovery":"The paper claims that, in this Lorentz-violating global-monopole spacetime, fermionic greybody factors are computable from a clean separation of the Dirac and Rarita-Schwinger equations: the angular equations are solved analytically, and the radial equations decouple in the tortoise coordinate into Schrödinger-like forms whose barrier transmission gives the greybody factors. It further claims that the strong-field deflection angle of photons can be worked out explicitly, yielding expressions for the positions and magnifications of relativistic images, and that the shadow boundary can be computed and depends on both the Lorentz-violating parameter and the monopole charge. The intended claim i","pith_inferences":["An implicit consequence: shadow-radius or image-position measurements could be inverted into bounds on the Lorentz-violating parameter and monopole charge; the paper derives the mapping but does not itself produce an experimental bound.","The paper's separation assumption for the Rarita-Schwinger system is nontrivial; if consistency conditions for spin-3/2 propagation in a curved background restrict the parameter space, the greybody-factor expressions would hold only on that restricted submanifold.","Because greybody factors and lensing both depend on the same two parameters, the two observables are not independent—a future consistency test would be to see whether a single pair of LV parameter and monopole charge simultaneously fits radiation and image data."],"forward_implications":["Fermion greybody factors, and therefore Hawking-emission spectra, shift by continuous amounts as the Lorentz-violating parameter and the monopole charge vary, so the model predicts departures from standard global-monopole black-hole radiation.","Relativistic-image positions and magnifications computed from the strong-field bending angle give concrete numbers that strong-lensing observations could in principle check.","The shadow radius and shape are predicted as functions of the two parameters, giving a direct observable link between Lorentz violation and horizon-scale images.","Setting the LV parameter to zero should recover the standard global-monopole (or Schwarzschild) results, so the paper's formulas form a parameter family of earlier known cases.","The same tortoise-coordinate Schrödinger-potential route works for spin 1/2 and spin 3/2, meaning both Fermi sectors can be treated in one framework."],"supporting_citations":[],"fun_headline_variants":["Lorentz-violating monopole reshapes black hole shadows","Fermion greybody factors and strong lensing in Lorentz-violating monopole","Shadows reveal Lorentz violation in global monopole black holes","Monopole charge and Lorentz-violating parameter shape black hole images"],"cache_read_input_tokens":2688,"weakest_assumption_plain":"The whole derivation rests on a clean separation of the Dirac and Rarita-Schwinger equations in this spacetime, with an analytically solvable angular equation and a consistent spin-3/2 field; if that separation fails or picks up extra constraints, the greybody factors no longer follow.","fun_headline_variants_meta":{"raw":{"variants":["Lorentz-violating monopole reshapes black hole shadows","Fermion greybody factors and strong lensing in Lorentz-violating monopole","Shadows reveal Lorentz violation in global monopole black holes","Monopole charge and Lorentz-violating parameter shape black hole images"]},"model":"deepseek-v4-flash","effort":"low","cost_usd":0.000779,"raw_usage":{"total_tokens":3253,"prompt_tokens":691,"completion_tokens":2562,"prompt_tokens_details":{"cached_tokens":256},"prompt_cache_hit_tokens":256,"prompt_cache_miss_tokens":435,"completion_tokens_details":{"reasoning_tokens":2487}},"tokens_in":435,"tokens_out":2562,"duration_ms":19471,"temperature":1.0,"reasoning_tokens":2487,"cache_read_input_tokens":256,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-08-05T18:13:52.020391+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":"Pick a fixed value of the LV parameter and monopole charge, numerically integrate the separated radial equations, and check whether the resulting greybody factors and shadow radius reproduce the known Schwarzschild/global-monopole limits when the LV parameter is sent to zero; independently, impose the Rarita-Schwinger constraint equations in this metric and see whether they require an algebraic condition not used in the paper. If the constraints fail, the angular solution cannot describe a propagating spin-3/2 mode.","supporting_citations":[],"review_version":1}