{"id":"2a31607d-ad63-4c47-b789-27a936ade36a","arxiv_id":"2506.18442","paper_version":2,"verdict":"CONDITIONAL","confidence":"MODERATE","novelty_score":5.0,"correctness_risk":"high","formal_verification":"none","parameter_count":9,"one_line_summary":"A GmSUGRA parameter scan maps viable neutralino dark matter scenarios for both signs of mu and claims a first sbottom coannihilation region for mu<0, though internal contradictions weaken that claim.","lead":"This paper scans the parameter space of a supersymmetric GUT variant called GmSUGRA under current LHC, dark matter relic density, and direct detection limits, and reports which neutralino annihilation mechanisms survive. The authors claim a new sbottom-coannihilation region for negative Higgsino mass, but parts of the paper contradict that claim.","discovery_kind":"extension","skeptic_critique":{"model":"deepseek-v4-flash","headline":"The claimed first sbottom–neutralino coannihilation region is contradicted by the paper's own statement that no red points exist in that channel, leaving only a single unverified benchmark point.","rationale":"The reader identified scan coverage as the weakest assumption. I agree, and I would sharpen it further: the problem is not merely possible under-sampling, but an explicit in-text admission that no red sbottom-coannihilation points were found. That admission directly contradicts the abstract's 'for the first time' claim and the single benchmark point in Table I. Because the contradiction is textual and could be resolved by a denser scan plus a revised statement, the work need not be rejected outright; however, the central novelty claim is not currently supported by the presented evidence. The other mechanisms in the paper are standard and checkable, but the headline result hinges on one point whose status is contradicted by the authors' own description. A focused scan and an independent relic-density check for Point 6 would settle the issue, so a conditional verdict is appropriate.","tokens_in":17783,"tokens_out":4269,"duration_ms":43083,"concrete_test":"Run a dedicated high-density scan with the same constraints and ISAJET/Metropolis-Hastings setup, seeded around Table I Point 6 (mU0≈103 GeV, M1≈2749 GeV, M2≈3074 GeV, mEc≈1142 GeV, mL≈630 GeV, tanβ≈34.6, μ<0), and count red points in the m_b1–m_chi01 plane with mass gap below 10%. If no statistically meaningful cluster of red points appears, the sbottom-coannihilation claim is unsupported as stated.","verdict_should_be":"CONDITIONAL","load_bearing_attack":"To support the central claim, the scan must actually produce viable red points in the sbottom–neutralino coannihilation channel. The paper's own Section III undermines this: after noting red points near 1–1.3 TeV for μ<0, it states 'In our present study, somehow we do not have a large density of green and orange points in these channels, so in the results, no red points. This is an artifact of scanning. Had we done some more focused scans, we would have populated this region... so we would get NLSP sbottom solutions too.' That is an explicit assertion that the published scan contains no red sbottom-coannihilation points. The abstract nevertheless claims this channel 'for the first time', and Table I Point 6 is presented as a red sbottom-coannihilation benchmark with Ωh²=0.120. A single point whose existence is denied elsewhere in the same paper cannot carry a novelty claim, regardless of whether the statement is a leftover from an earlier draft. The concern is not that the physics is impossible; it is that the submitted results, as written, do not establish the claimed viable region. The A-funnel mass-range mismatch between the abstract (0.4–1.4 TeV) and Section III (1.2–2.9 TeV) reinforces the impression of internal inconsistency.","agreement_with_reader":"agree"},"referee_report":{"model":"deepseek-v4-flash","summary":"This paper performs a random scan of the MSSM parameter space in the Generalized Minimal Supergravity (GmSUGRA) framework using ISAJET, allowing both signs of the Higgsino mass parameter mu and treating soft scalar masses, gaugino masses, trilinears, tan beta, and sign(mu) as free inputs. The scan is filtered by REWSB, neutralino LSP conditions, LEP/LHC sparticle bounds, Higgs mass, B-physics constraints, Planck 2018 relic density, and current LZ/XENONnT direct-detection limits. The authors report viable dark matter mechanisms for mu<0 and mu>0, including stau, chargino, stop, sbottom, and gluino coannihilation, as well as A-, H-, and Z-funnel annihilation, and they claim that sbottom-neutralino coannihilation appears for the first time in GmSUGRA and only for mu<0. They also report that the supersymmetric contribution to (g-2)_mu remains within about 2 sigma of the updated SM prediction, and they give benchmark spectra in Tables I and II.","tokens_in":18023,"tokens_out":9468,"duration_ms":91108,"significance":"If established, a first observation of sbottom-neutralino coannihilation in GmSUGRA would be a nontrivial result, because the GUT-scale scalar mass relations in Eqs. (6)-(8) correlate the sbottom mass with the squark sector, making near-degenerate sbottom-LSP solutions non-generic. The paper also provides a useful mapping of the surviving parameter space under current LHC, Planck, and direct-detection constraints, with concrete benchmark points and a standard set of constraints. The use of ISAJET with a Metropolis-Hastings scan and the explicit list of experimental filters is appropriate. However, the central novelty is not currently supported by the text: Section III states that the published scan has no red sbottom-coannihilation points and calls this an artifact of scanning, while the abstract, Section IV, and Table I claim the opposite. The A-funnel mass range also disagrees between the abstract and Section III. These contradictions must be resolved before the results can be relied upon.","major_comments":[{"comment":"The central novelty claim is internally contradicted. In the sbottom paragraph, the text first says 'viable red points near 1-1.3 TeV hint at possible sbottom coannihilation' and then immediately states 'in our present study, somehow we do not have a large density of green and orange points in these channels, so in the results, no red points. This is an artifact of scanning.' The abstract nonetheless claims 'for the first time sbottom-neutralino coannihilation solutions in GmSUGRA,' and Table I Point 6 is labeled as sbottom-neutralino coannihilation with an Omega h^2 value consistent with the Planck range. As written, the published scan contains no red point in this channel, so neither the first-time claim nor Point 6 is supported. Please either provide the actual red points from a dedicated scan, with their coordinates and the constraints they pass, or remove the 'for the first time' claim and relabel Point 6 accordingly.","section":"Section III (sbottom paragraph), Abstract, Section IV, Table I"},{"comment":"The abstract states that pseudoscalar Higgs masses in the A-funnel lie in the range 0.4-1.4 TeV, while Section III states that funnel solutions are present for mA from approximately 1.2 TeV to 2.9 TeV. These are mutually incompatible ranges. The authors should correct one of them, or specify that the abstract range refers to a different quantity such as the LSP mass rather than mA. This discrepancy, together with the sbottom issue, makes it difficult to extract reliable quantitative conclusions from the paper.","section":"Abstract vs Section III (A-funnel paragraph)"},{"comment":"In Table I, the Omega h^2 entries for Points 5 and 6 are printed as '116' and '120'; these should presumably be 0.116 and 0.120, since as printed they are far outside the Planck 2018 5-sigma range. Because Point 6 is the central sbottom-coannihilation benchmark, the table must be unambiguous. Please also state explicitly whether Point 6 is a red point from the published scan or a separate solution; if it comes from a different or additional scan, that scan must be documented.","section":"Table I (Omega h^2 entries for Points 5 and 6)"}],"minor_comments":[{"comment":"The sentence before Table I reads only 'we have studied the GmSUGRA' and is an incomplete fragment; it should be completed or deleted.","section":"Section III, first sentence before Table I"},{"comment":"The formula for Delta a_mu^SUSY is dimensionally inconsistent as written: M_i mu tan beta / m_SUSY^4 has mass dimension -2, while a_mu is dimensionless. The muon mass squared is presumably implicit in the full expression and should be shown explicitly or the formula should be presented as a schematic estimate.","section":"Eq. (1)"},{"comment":"The lower limit for BR(Bs -> mu+ mu-) is printed as '0.8 x 1--9'; this appears to be a typo for 0.8 x 10^{-9}.","section":"Section II, constraint (e), Eq. (15)"},{"comment":"The word 'underrsaturated' appears in the captions and should be corrected to 'undersaturated'; 'S-particles' should be 'sparticles'.","section":"Figure captions, Figures 1 and 2"},{"comment":"The claims that sbottom coannihilation is 'absent for mu>0' and 'for the first time' are stronger than what a random scan can establish, especially given the admitted under-sampling of this channel. These statements should be softened to 'not observed in this scan' unless a dedicated scan is provided.","section":"Abstract and Section IV, sbottom claim wording"}],"recommendation":"major_revision","confidential_remarks":"The manuscript is within the scope of the journal and the overall approach is standard. The main barrier is the internal inconsistency around the sbottom-coannihilation result: the abstract and Table I claim a first-time viable region, while Section III says no red points exist in that channel. This is fixable by either supplying a focused scan that populates the region or by rephrasing the claim as a hint rather than an established result. I would ask the editor to require that the abstract and body be reconciled, and that the provenance of Table I Point 6 be clarified, before further consideration."},"author_rebuttal":null,"desk_editor":{"model":"deepseek-v4-flash","letter":"Short version: this is a standard but competent parameter scan of GmSUGRA, updated with LZ 2024 and the lattice-QCD based (g-2) prediction. It should not be desk-rejected, but it should not be accepted as is.\n\nWhat is actually new is not the framework—the model and scanning program are the authors' own from earlier papers. The new elements are the updated constraints, the two signs of mu, and the benchmark tables. Revisiting mu<0 is timely now that the (g-2) anomaly has weakened, and the tables give concrete, checkable masses and cross sections. The scan itself is standard ISAJET with Metropolis-Hastings, uses external constraints, and is not circular. The broad conclusion that the negative-mu region has more viable parameter space under current LZ bounds is plausible and consistent with earlier work.\n\nThe soft spots are real. The paper's central novelty claim—first sbottom-neutralino coannihilation in GmSUGRA—is undercut by its own text. Section III explicitly says that in the sbottom channel there are no red points and that this is an artifact of scanning, then Table I Point 6 presents a sbottom-coannihilation benchmark with Omega h^2 = 0.120, and the abstract and conclusion advertise it as first-time. That is a direct internal contradiction. A single point from an under-sampled scan cannot carry the novelty claim. The fix is simple: run a focused scan of that region, show red points and coverage statistics, or drop the claim.\n\nThe A-funnel mass ranges also conflict: the abstract says 0.4–1.4 TeV while Section III says 1.2–2.9 TeV. This looks like an editorial slip, but it matters because the abstract is what most readers see. Table I also has a formatting issue in the Omega h^2 row (entries read \"116 120\" instead of decimals), and no scan artifacts or point counts are provided, so the coverage claims cannot be checked. None of these are fatal to the whole paper, but together they obscure the actual result.\n\nThe citation pattern is not a serious problem. Self-citations are used to establish the prior GmSUGRA baseline, which is legitimate in a continuing research program, and external experimental constraints are cited properly.\n\nWho is this for? SUSY phenomenologists who want updated LZ and LHC benchmark points for Run-3 projections. With the sbottom claim either verified or withdrawn, and the inconsistencies fixed, this is publishable. I would send it to a serious referee rather than desk-reject; the underlying scan work is honest and the benchmark tables are useful, even if the current version oversells one result.","headline":"Useful, checkable update of GmSUGRA scans under LZ 2024 and lattice-QCD (g-2), but the headline sbottom-coannihilation claim is directly contradicted inside the paper and needs a focused scan before it can stand.","tokens_in":18679,"tokens_out":3150,"would_cite":false,"duration_ms":35437,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":["12.60.Jv","14.80.Ly","95.35.+d"],"model":"deepseek-v4-flash","headline":"Within the GmSUGRA framework, a comprehensive random scan with current collider, relic-density, and direct-detection constraints finds that sbottom-neutralino coannihilation is a viable neutralino dark-matter mechanism for the first time…","keywords":["Generalized Minimal Supergravity","neutralino dark matter","sbottom coannihilation","muon anomalous magnetic moment","supersymmetry","direct detection","MSSM","electroweak supersymmetry"],"falsifier":"Run a dedicated high-density scan (grid or focused Markov-chain sampling) of the GmSUGRA parameter space restricted to the sbottom-neutralino mass-degenerate window, $m_{\\tilde{b}_1} - m_{\\tilde{\\chi}^0_1}$ between 0 and 100 GeV, for both signs of $\\mu$, using the same constraints; if relic-density-compatible red points appear for $\\mu>0$ as well, the claimed exclusive $\\mu<0$ sbottom coannihilation is a sampling artifact. An experimental cross-check would be a collider search for a compressed $\\sim 1.3$ TeV sbottom with an $\\sim 80$ GeV mass gap decaying to $b$ plus missing energy, whose discovery would support the benchmark point and whose exclusion would challenge it.","tokens_in":17495,"feed_emoji":"🌌","tokens_out":18220,"duration_ms":149063,"temperature":0.7,"pith_summary":"The paper maps where neutralino dark matter can still hide in the Generalized Minimal Supergravity (GmSUGRA) model, now that the muon anomalous magnetic moment appears consistent with the Standard Model and both signs of the Higgsino mass parameter $\\mu$ are worth considering. Running a large random scan under current collider bounds, the observed relic density, and the latest direct-detection limits, the authors find viable dark-matter production through coannihilation with staus, stops, charginos, sbottoms, and gluinos, and through $A$-, Higgs-, and $Z$-resonance funnels. Their headline result is that sbottom-neutralino coannihilation — the lightest sbottom nearly degenerate with the lightest neutralino — works as a dark-matter mechanism for $\\mu<0$ only, with a benchmark point at $m_{\\tilde{b}_1} \\approx 1.321$ TeV and $m_{\\tilde{\\chi}^0_1} \\approx 1.240$ TeV giving the observed relic abundance. They also find that the $\\mu<0$ regime is more permissive overall, while for $\\mu>0$ the Higgs- and $Z$-pole regions are largely ruled out by direct detection, and that supersymmetric contributions to the muon $g-2$ stay within about $2\\sigma$ of the current Standard Model prediction. If these results hold, they give concrete mass ranges and benchmark points for future collider and dark-matter experiments to target.","feed_headline":"Dark matter via sbottom coannihilation works only when mu is negative","feed_subtitle":"New scan maps viable dark-matter regions, giving collider and direct-detection searches concrete targets.","key_machinery":"The carrying object is the GmSUGRA boundary condition itself: a generalized SU(5)-based supergravity in which an adjoint Higgs field modifies the GUT-scale gauge kinetic function, producing the non-universal gaugino mass relation $M_2 - M_3 = \\frac{5}{3}(M_1 - M_3)$, equivalently $M_3 = \\frac{5}{2}M_1 - \\frac{3}{2}M_2$, and scalar mass relations that allow light electroweak sleptons and gauginos while squarks are heavy. The argument runs on a Markov-chain Monte Carlo–driven random scan over this parameter space, with each point processed by a spectrum calculator and filtered through bounds on the Higgs mass, B-physics observables, sparticle masses, relic density, and spin-independent and spin-dependent direct-detection cross sections. The specific claim about sbottom-neutralino coannihilation rests on the near-degeneracy condition $m_{\\tilde{b}_1} \\approx m_{\\tilde{\\chi}^0_1}$ in the $\\mu<0$ scan, realized as a mass gap of about 80 GeV at the benchmark point, which makes the lightest sbottom the next-to-lightest supersymmetric particle and enables efficient coannihilation.","core_discovery":"The central claim is that within the MSSM under the GmSUGRA boundary conditions, a broad random scan filtered by radiative electroweak symmetry breaking, collider sparticle mass bounds, B-physics observables, the Higgs mass, the observed cosmological relic-density range, and current direct-detection limits reveals the full menu of neutralino dark-matter mechanisms, and specifically, for the first time in this framework, sbottom-neutralino coannihilation as a viable mechanism, exclusively for $\\mu<0$. The representative solution, Point 6 of Table I, has a lightest sbottom at 1.321 TeV, a bino-like lightest neutralino at 1.240 TeV, and $\\Omega h^2 = 0.120$, consistent with the observed relic density. The paper also claims that the $\\mu<0$ parameter space is broader and more flexible than $\\mu>0$: the Higgs- and $Z$-funnel regions survive for $\\mu<0$ but are largely excluded for $\\mu>0$ by direct detection, and the gluino-coannihilation region is strongly squeezed by collider bounds. The authors further report that the supersymmetric contribution to the muon anomalous magnetic moment falls within $1\\sigma$–$2\\sigma$ of the updated Standard Model value, so the model is not in tension with the now-reduced $g-2$ anomaly. They caution, however, that the scan density in the sbottom channel is limited, so the new red-point region should be confirmed by more focused scanning.","pith_inferences":["The paper's own admission of scan sparsity implies that the $\\mu<0$-only sbottom channel is a conjecture awaiting a dedicated scan; a denser scan could either confirm a genuine sign-asymmetry rooted in the spectrum or reveal that the channel also exists for $\\mu>0$.","If the muon $g-2$ anomaly continues to shrink as lattice-QCD inputs improve, the traditional preference for $\\mu>0$ weakens, and the map of viable $\\mu<0$ mechanisms this paper provides would become the default geography for electroweak supersymmetry searches.","Because the generalized gaugino mass relation makes the gluino mass a derived quantity, the strongly constrained gluino-coannihilation channel suggests that the electroweak coannihilation channels are the more robust discovery windows, a prioritization that collider searches could adopt.","Re-analysing existing compressed-sbottom search data in the 1–1.3 TeV range with the specific kinematics of an $\\sim 80$ GeV mass gap would directly test the benchmark point without waiting for new data."],"forward_implications":["Sbottom-neutralino coannihilation joins stau, stop, chargino, and gluino coannihilation plus the $A$/H/$Z$ funnels as a viable neutralino dark-matter mechanism in GmSUGRA, but only for $\\mu<0$, with a concrete benchmark at $m_{\\tilde{b}_1}\\approx 1.321$ TeV and $m_{\\tilde{\\chi}^0_1}\\approx 1.240$ TeV.","The $\\mu<0$ scenario retains a substantially larger viable parameter space than $\\mu>0$, so future collider searches for electroweakinos and sleptons, and upcoming direct-detection exposures, should treat the negative-$\\mu$ regime as a primary target.","The surviving dark-matter mechanisms are mostly compressed electroweak spectra, with sleptons, stops, sbottoms, or charginos nearly degenerate with the neutralino at mass splittings below roughly ten percent.","The model's supersymmetric contribution to the muon anomalous magnetic moment stays within $1\\sigma$–$2\\sigma$ of the updated Standard Model value, so this framework neither requires nor is excluded by the residual $g-2$ discrepancy.","Several benchmark points fall within the expected sensitivity of the next collider runs and the next generation of direct-detection experiments, giving testable predictions for where new physics should appear first."],"supporting_citations":[{"why":"Introduces the GmSUGRA model with a modified gauge kinetic function, supplying the gaugino mass relation that defines the scan parameter space.","marker":"[39]"},{"why":"Derives the GUT-scale scalar mass relations from the adjoint SU(5) Higgs, fixing how squark masses follow from slepton masses in the scan.","marker":"[40]"},{"why":"Establishes the electroweak-scale SUSY regime in GmSUGRA that motivates the mass ranges scanned and the light-slepton assumptions.","marker":"[41]"},{"why":"Provides the spectrum and relic-density calculator that turns each parameter-space point into masses and observables.","marker":"[42]"},{"why":"Supplies the Markov-chain Monte Carlo scanning algorithm used to explore the parameter space.","marker":"[44]"},{"why":"Gives the observed cold dark-matter relic-density range (0.114–0.126) used to classify red viable points.","marker":"[55]"},{"why":"Gives the spin-independent direct-detection limit used to filter out most of the $\\mu>0$ Higgs/$Z$-pole points.","marker":"[28]"},{"why":"Provides the updated experimental muon anomalous magnetic moment average that reduces the $g-2$ tension and justifies studying $\\mu<0$.","marker":"[35]"},{"why":"Provides the updated Standard Model prediction for the muon anomaly from lattice QCD, the reference for the $1\\sigma$–$2\\sigma$ compatibility claim.","marker":"[36]"},{"why":"Sets the current experimental bound on compressed sbottom pair production, which the 1.32 TeV benchmark point is designed to evade.","marker":"[72]"}],"fun_headline_variants":["Sbottom coannihilation in GmSUGRA only for negative mu","Negative mu enables new sbottom-neutralino coannihilation in MSSM","Sbottom coannihilation: a negative-mu-only dark matter path in GmSUGRA","Mu<0 unlocks sbottom coannihilation in GmSUGRA dark matter scans","Negative Higgsino mass opens sbottom coannihilation in GmSUGRA"],"cache_read_input_tokens":3200,"weakest_assumption_plain":"The central claim depends on the random scan adequately covering the sbottom-neutralino coannihilation region; the paper itself says that scan density there is low and that the sparse points are an artifact of scanning, so the claimed first-time sbottom channel, and its absence for $\\mu>0$, could be an artifact of scanning rather than a genuine feature of the model.","fun_headline_variants_meta":{"raw":{"variants":["Sbottom coannihilation in GmSUGRA only for negative mu","Negative mu enables new sbottom-neutralino coannihilation in MSSM","Sbottom coannihilation: a negative-mu-only dark matter path in GmSUGRA","Mu<0 unlocks sbottom coannihilation in GmSUGRA dark matter scans","Negative Higgsino mass opens sbottom coannihilation in GmSUGRA"]},"model":"deepseek-v4-flash","effort":"low","cost_usd":0.000875,"raw_usage":{"total_tokens":3955,"prompt_tokens":1281,"completion_tokens":2674,"prompt_tokens_details":{"cached_tokens":384},"prompt_cache_hit_tokens":384,"prompt_cache_miss_tokens":897,"completion_tokens_details":{"reasoning_tokens":2569}},"tokens_in":897,"tokens_out":2674,"duration_ms":19047,"temperature":1.0,"reasoning_tokens":2569,"cache_read_input_tokens":384,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-08-15T18:48:49.439590+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":"Run a dedicated high-density scan (grid or focused Markov-chain sampling) of the GmSUGRA parameter space restricted to the sbottom-neutralino mass-degenerate window, $m_{\\tilde{b}_1} - m_{\\tilde{\\chi}^0_1}$ between 0 and 100 GeV, for both signs of $\\mu$, using the same constraints; if relic-density-compatible red points appear for $\\mu>0$ as well, the claimed exclusive $\\mu<0$ sbottom coannihilation is a sampling artifact. An experimental cross-check would be a collider search for a compressed $\\sim 1.3$ TeV sbottom with an $\\sim 80$ GeV mass gap decaying to $b$ plus missing energy, whose discovery would support the benchmark point and whose exclusion would challenge it.","supporting_citations":[],"review_version":2}