{"id":"508df531-23be-4e3d-bff3-032056b7ffc8","arxiv_id":"2607.04679","paper_version":2,"verdict":"CONDITIONAL","confidence":"HIGH","novelty_score":5.0,"correctness_risk":"medium","formal_verification":"none","parameter_count":2,"one_line_summary":"Coupled-channel OBE dynamics with S–D mixing produce three near-threshold poles dominated by BΣ/B*Σ that should show as narrow enhancements in open Bs0N, BΛ and B*Λ channels.","lead":"A one-boson-exchange calculation finds three near-threshold poles (masses roughly 6.44–6.52 GeV, widths a few MeV) generated mainly by BΣ and B*Σ attraction in the antibottom-strange sector. If real, they would appear as narrow structures in BsN, BΛ and B*Λ spectra and test whether the molecular picture of Pc states extends to bottom.","discovery_kind":"extension","skeptic_critique":{"model":"grok-4.5","headline":"No significant objection beyond the short-range sensitivity already flagged; the central claim holds under the paper's own stated caveats.","rationale":"The paper’s central claim is carefully hedged (“possibility \to support existence \to useful guidance”). The single-channel bound states and the two less a-sensitive poles survive the documented short-range variation; only one of the three poles is fragile. That fragility is already the Reader’s weakest_assumption and is displayed rather than concealed. No additional load-bearing flaw (e.g., an algebraic error in the potential projection, an omitted long-range force that would reverse the attraction, or an inconsistent Riemann-sheet assignment) appears on a careful reading of Secs. II–III. Therefore the CONDITIONAL verdict with medium correctness risk remains appropriate; no upgrade or downgrade is warranted.","tokens_in":23100,"tokens_out":520,"duration_ms":4897,"concrete_test":"Recompute the three pole trajectories of Tables V–VII while replacing the monopole form factor (Eq. (20)) by a dipole form factor of the same cutoff range; if the 1/2−(BΣ) and 3/2−(B*Σ) poles remain within ~10 MeV of their reported positions and still couple dominantly to BΣ/B*Σ for a∈[0,0.5], the two robust poles survive the usual OBE regularization ambiguity.","verdict_should_be":"UNCHANGED","load_bearing_attack":"The Reader correctly isolates the load-bearing soft spot: the JP=1/2− pole near the B*Σ threshold is highly sensitive to the free short-range parameter a that multiplies the δ(r) contact term (Eqs. (24)–(25), Tables V–VI and Fig. 5). When a increases past ~0.17 the pole leaves the physical sheet and becomes a virtual state, so its resonant character is not robust. The other two poles (1/2−(BΣ) and 3/2−(B*Σ)) remain near-threshold and produce line-shape enhancements for a wide range of a and Λ. Because the paper itself maps this dependence, openly reports the virtual-state transition, and still claims only “possibility” plus experimental guidance rather than definitive existence of all three states, the sensitivity does not undermine the strongest claim as written. No deeper internal inconsistency (wrong isospin factors, missing channels that would qualitatively alter the attraction, or incorrect analytic continuation) is apparent.","agreement_with_reader":"agree"},"referee_report":{"model":"grok-4.5","summary":"The manuscript studies the coupled-channel system Bs0N–BΛ–B*Λ–BΣ–B*Σ in the one-boson-exchange framework with S–D mixing and a tunable short-range δ(r) contact term controlled by a dimensionless parameter a. Effective Lagrangians constrained by heavy-quark spin symmetry and SU(3) flavor symmetry are used to derive the potentials; a monopole form factor with cutoff Λ regularizes them. Bound, virtual and resonant poles are located by analytic continuation of the multi-channel S-matrix. Single-channel analysis yields three attractive bound states (1/2−(BΣ), 1/2−(B*Σ), 3/2−(B*Σ)). In the full coupled-channel calculation these evolve into near-threshold poles in the 6.44–6.52 GeV window with widths of a few to several MeV. Residue and partial-width analyses show that the poles are generated mainly by the BΣ and B*Σ interactions and should appear as enhancements or cusps in the open channels Bs0N, BΛ and B*Λ. The authors themselves emphasize that the higher 1/2− pole near the B*Σ threshold is sensitive to a and can become a virtual state when the contact term is removed.","tokens_in":23326,"tokens_out":1062,"duration_ms":8294,"significance":"If the predicted poles survive a more constrained short-range treatment, the work supplies concrete, falsifiable guidance for experimental searches of antibottom-strange molecular pentaquarks at the LHC: masses, preferred final states, and the distinction between Breit–Wigner peaks and threshold cusps. The calculation is a pure prediction (no data are fitted), the free parameters Λ and a are varied openly, and the analytic continuation, residue extraction and partial-width formulae are standard and consistently applied. The explicit mapping of the short-range sensitivity (especially Fig. 5 and Tables V–VI) is a methodological strength that allows the reader to judge robustness. The results therefore constitute a useful, if still model-dependent, extension of the molecular picture from the charm to the bottom-strange sector.","major_comments":[{"comment":"Sec. II B, Eqs. (24)–(25) and Tables V–VI / Fig. 5: the higher JP=1/2− pole near the B*Σ threshold moves from a resonance on the physical sheet to a virtual state once a exceeds ~0.17. Because a is an essentially free phenomenological parameter, the resonant character of this particular state is not robust. The abstract and summary correctly flag the sensitivity, yet the claim of “three” near-threshold molecular states should be qualified more sharply: only the 1/2−(BΣ) and 3/2−(B*Σ) poles remain stable across the explored range of a. A short additional paragraph that isolates the two robust poles and treats the third as a possible virtual-state/cusp structure would bring the central claim into line with the paper’s own numerical findings.","section":null},{"comment":"Sec. III B and Table VIII: partial widths are reported only for the extreme case a=0. Given that the higher 1/2− pole’s existence depends on a, the partial-width analysis should be repeated for at least one intermediate value (e.g. a=0.5) so that the experimental guidance for the robust poles is not tied exclusively to the most attractive short-range prescription.","section":null}],"minor_comments":[{"comment":"Throughout: inconsistent notation for the heavy mesons (B vs ¯B, Bs0 vs B0s). A single convention should be fixed in Sec. II and used uniformly.","section":null},{"comment":"Fig. 1 caption and text: “cutoffset” appears to be a typographical error for “cutoff set”.","section":null},{"comment":"Table III: the threshold values are quoted to 0.1 MeV while the Particle Data Group averages carry larger uncertainties; a brief remark on the adopted mass values would be helpful.","section":null},{"comment":"Sec. IV: “indecate” → “indicate”; a few other minor spelling slips (e.g. “deu to”) remain.","section":null},{"comment":"The experimental-search discussion correctly notes that weak decays of ground-state bottom baryons are kinematically closed; a short quantitative estimate of the expected prompt-production cross-section scale (even order-of-magnitude) would strengthen the guidance for LHCb.","section":null}],"recommendation":"minor_revision","confidential_remarks":"The short-range sensitivity is real but is already mapped by the authors; the manuscript is therefore closer to a solid phenomenological prediction than to an over-claim. I see no deeper inconsistency that would warrant major revision or rejection. The work fits the journal’s scope for model-based spectroscopy of exotic hadrons."},"author_rebuttal":null,"desk_editor":{"model":"grok-4.5","letter":"The new piece is a concrete five-channel OBE calculation for Bs0N–B(∗)Λ–B(∗)Σ that produces three near-threshold poles (6.44–6.52 GeV, few-to-several MeV widths) dominated by BΣ and B*Σ, with residues, partial widths, and line-shape guidance for LHCb. Method is standard—HQSS/SU(3) Lagrangians, monopole form factor, S–D mixing, analytic continuation of the multi-channel S-matrix—but the system itself and the systematic a-scan of the δ(r) contact term have not been done before.\n\nWhat they do well: potentials are derived cleanly, isospin factors and partial-wave projections are explicit, single-channel binding is shown first, then the poles are tracked on the proper Riemann sheets with couplings and partial widths. They openly report that the JP=1/2− pole near B*Σ flips from resonance to virtual state once a exceeds ~0.17, while the 1/2−(BΣ) and 3/2−(B*Σ) poles stay near threshold over a wide range of Λ and a. That transparency keeps the claim at the right level (“possibility” plus search windows).\n\nSoft spot is exactly the one the reader flagged: a is a free dial that multiplies the short-range contact piece, and one of the three poles lives or dies by it. Cut-off dependence is the usual OBE story. Neither is hidden, and neither invents a contradiction with the equations. No data fitting, no circularity beyond reusing the same OBE philosophy the authors used for Pc. Citations look complete for the molecular literature.\n\nThis is for people who already work on heavy molecular pentaquarks or who need concrete mass windows and decay channels for prompt production at LHCb. It is not a paradigm shift, but it is a usable prediction set. I would send it to referees; the calculation is careful enough and the caveats are already on the page. Worth a look if you are writing or reviewing in this corner of the spectrum.","headline":"Solid five-channel OBE prediction of three narrow near-threshold P_bs-bar poles; one of them is soft under the free short-range parameter a, but the paper maps that honestly.","tokens_in":23967,"tokens_out":546,"would_cite":true,"duration_ms":5110,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"grok-4.5","headline":"One-boson-exchange dynamics in the Bs0N–BΛ–B*Λ–BΣ–B*Σ system produce three near-threshold poles that support molecular antibottom-strange pentaquarks.","keywords":["molecular pentaquarks","one-boson-exchange","antibottom-strange","BΣ threshold","coupled-channel poles","S–D wave mixing","short-range δ(r)"],"falsifier":"A prompt-production amplitude analysis at a hadron collider of the Bs0N, BΛ and B*Λ invariant-mass spectra near 6.44–6.52 GeV that finds no corresponding narrow peaks or threshold cusps would rule out the predicted poles.","tokens_in":23977,"feed_emoji":"⚛️","tokens_out":777,"duration_ms":5378,"temperature":0.7,"pith_summary":"This paper asks whether antibottom-strange pentaquarks can form as molecules of a heavy antimeson and a light baryon near the BΣ and B*Σ thresholds. Using a one-boson-exchange potential that includes S–D wave mixing and a tunable short-range contact term, the authors solve the coupled-channel Schrödinger equation and analytically continue the S-matrix into the complex energy plane. Single-channel BΣ and B*Σ systems with JP = 1/2− and 3/2− already bind for reasonable cutoffs; when the lower open channels are switched on, those bound states become three nearby poles whose masses sit between 6.44 and 6.52 GeV and whose widths are only a few to several MeV. The poles couple most strongly to BΣ and B*Σ, so their experimental fingerprints should appear mainly as enhancements or cusps in the Bs0N, BΛ and B*Λ invariant-mass spectra. The result supplies concrete mass windows and preferred final states for collider searches of the still-unobserved Pbs-bar states.","feed_headline":"Three poles near BΣ and B*Σ thresholds point to Pbs-bar molecules","feed_subtitle":"Masses 6.44–6.52 GeV and few-MeV widths give concrete search windows in Bs0N, BΛ and B*Λ spectra","key_machinery":"Analytic continuation of the multi-channel S-matrix obtained from the coordinate-space Schrödinger equation with OBE potentials that include a monopole form factor and a dimensionless parameter a controlling the short-range δ(r) contact term; poles on Riemann sheets connected to the physical axis are identified as the molecular candidates.","core_discovery":"In the full Bs0N–BΛ–B*Λ–BΣ–B*Σ coupled system the OBE interaction generates three near-threshold poles (one below BΣ with JP = 1/2− and two associated with B*Σ with JP = 1/2− and 3/2−) whose masses lie in the 6.44–6.52 GeV window and whose widths are a few to several MeV; these poles are generated mainly by the BΣ and B*Σ interactions and produce observable line-shape enhancements in the lower open channels, supporting the existence of molecular Pbs-bar pentaquarks.","pith_inferences":[],"forward_implications":[],"fun_headline_variants":["Three near-threshold poles point to molecular Pbs-bar pentaquarks","BΣ and B*Σ poles at 6.44–6.52 GeV support antibottom-strange molecules","OBE coupled channels yield Pbs-bar states near BΣ B*Σ thresholds","Near-threshold poles in Bs0N BΛ spectra from BΣ B*Σ interactions","Three poles generated by BΣ B*Σ hint at molecular Pbs-bar pentaquarks"],"cache_read_input_tokens":16512,"weakest_assumption_plain":"The short-range contact piece of the potential is controlled by a single free number a that is varied by hand; one of the three poles changes from a resonance into a virtual state when that number is switched off.","fun_headline_variants_meta":{"raw":{"variants":["Three near-threshold poles point to molecular Pbs-bar pentaquarks","BΣ and B*Σ poles at 6.44–6.52 GeV support antibottom-strange molecules","OBE coupled channels yield Pbs-bar states near BΣ B*Σ thresholds","Near-threshold poles in Bs0N BΛ spectra from BΣ B*Σ interactions","Three poles generated by BΣ B*Σ hint at molecular Pbs-bar pentaquarks"]},"model":"grok-4.5","effort":"low","cost_usd":0.007756,"raw_usage":{"total_tokens":2034,"prompt_tokens":1016,"num_sources_used":0,"completion_tokens":123,"cost_in_usd_ticks":77560000,"prompt_tokens_details":{"text_tokens":1016,"audio_tokens":0,"image_tokens":0,"cached_tokens":256},"completion_tokens_details":{"audio_tokens":0,"reasoning_tokens":895,"accepted_prediction_tokens":0,"rejected_prediction_tokens":0}},"tokens_in":1016,"tokens_out":123,"duration_ms":8257,"temperature":1.0,"reasoning_tokens":895,"cache_read_input_tokens":256,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-07-11T15:17:56.806110+00:00","model_set":{"reader":"grok-4.5"},"falsifier":"A prompt-production amplitude analysis at a hadron collider of the Bs0N, BΛ and B*Λ invariant-mass spectra near 6.44–6.52 GeV that finds no corresponding narrow peaks or threshold cusps would rule out the predicted poles.","supporting_citations":[],"review_version":1}