{"id":"a5813307-1c67-4e0d-bfb0-c5b7f1608b41","arxiv_id":"2504.20257","paper_version":1,"verdict":"UNVERDICTED","confidence":"HIGH","novelty_score":0.0,"correctness_risk":"unknown","formal_verification":"none","parameter_count":0,"one_line_summary":"Poland recommends FCC-ee as the preferred next CERN collider and gives a linear e+e- collider second priority in its national input to the 2026 European Strategy update.","lead":"This is the official Polish high-energy physics community input to the 2026 European Strategy for Particle Physics update. It recommends FCC-ee as the top priority next CERN flagship project, with a linear collider as the second option, while reaffirming support for LHC and HL-LHC.","discovery_kind":"review","skeptic_critique":{"model":"deepseek-v4-flash","headline":"No significant objection identified: the recommendation is a policy preference explicitly grounded in prior ESPPU and CERN FCC studies, an appropriate basis for a national strategy input.","rationale":"The reader correctly identified the borrowed premise, but I do not regard it as a damaging weakness. For a national strategy input, relying on the ESPPU and CERN feasibility studies is the appropriate epistemic stance; the document does not claim to derive the physics case independently. The document is internally coherent: its executive summary, Section II, and Section XII all consistently rank FCC-ee first, a linear collider second, while supporting continued LHC/HL-LHC exploitation and R&D on alternative technologies. The explicit caveats (e.g., dependence on HL-LHC outcomes and the possibility of unexpected BSM scenarios) further indicate that the authors understand the contingency of their recommendation. No calculation, formal derivation, or empirical claim is made that could be checked or falsified. Therefore the UNVERDICTED verdict from the reader is appropriate, and no adjustment is needed. The proposed test is a simple source-verification step that would confirm the document's faithful representation of its cited basis, but I do not expect it to change the verdict.","tokens_in":54575,"tokens_out":2456,"duration_ms":28546,"concrete_test":"Verify the document's cited basis: check reference [1] (2020 ESPPU) and the FCC-ee feasibility sources cited in Sections II and XII to confirm they indeed recommend an e+e- Higgs factory as the highest priority and claim one-to-two-order-of-magnitude electroweak precision improvements at the TeraZ run. If those citations accurately represent the cited sources, the recommendation is faithfully grounded; if not, the document misattributes its premise.","verdict_should_be":"UNCHANGED","load_bearing_attack":"The central claim is not a novel scientific assertion; it is a community preference ranking FCC-ee first and a linear collider second. The document transparently states that this ranking follows the ESPPU and CERN's FCC feasibility work, and Section XII explicitly invokes 'previous updates of the European Strategy' and 'CERN has firmly established the FCC as its preferred flagship project.' The load-bearing premise is therefore borrowed, but that is the normal and correct structure for a national input document; it need not re-derive the FCC-ee physics case. The recommendation would lose its foundation only if ongoing FCC feasibility studies (cost, schedule, or physics case) were to fail, which is an external contingency rather than an internal inconsistency or an unsupported step. Minor self-assessments, such as the claim in Section IX that Polish competences cover 'approximately 80% of key components and technologies' of superconducting accelerators, are not load-bearing for the recommendation. I find no internal flaw that would make the document's recommendation unsound for its intended purpose.","agreement_with_reader":"partial"},"referee_report":{"model":"deepseek-v4-flash","summary":"This manuscript is the Polish national input to the 2026 update of the European Strategy for Particle Physics. It opens with an executive summary recommending that CERN host a flagship circular collider project, with FCC-ee as the preferred first step toward FCC-hh, and a linear collider facility at CERN as the second option for an e+e- Higgs factory. The body summarizes Polish activities in electroweak/Higgs physics, BSM and dark matter searches, flavour physics, strong interactions, neutrino and astroparticle physics, instrumentation, theory, accelerator technologies, computing, and education/outreach, followed by general conclusions. A separate backup document provides personnel and funding numbers, institutional tables, and detailed references. The scientific priority ordering is explicitly inherited from the 2020 ESPPU and from CERN's FCC feasibility program rather than re-derived in this document; the document's own contribution is the community capability inventory and the national preference ranking.","tokens_in":54723,"tokens_out":5873,"duration_ms":64130,"significance":"For a national input of this kind, the document is fit for purpose and generally well structured. It does not claim a new physics result, and none is needed: a strategy submission legitimately imports the scientific case from prior ESPPU and CERN documents. The document's strengths are its explicit consultation process (two Town Hall meetings, topical expert teams), concrete staffing numbers (~365 FTE staff, ~190 students, ~130 engineers/technicians), and an unusually detailed, well-referenced inventory of contributions to LHC, HL-LHC, and non-CERN projects. The main risk to the central recommendation is external - if ongoing FCC feasibility studies fail on cost, schedule, or physics grounds, the headline priority loses its foundation - but this is not an internal inconsistency and does not by itself weaken the document for its intended use.","major_comments":[],"minor_comments":[{"comment":"The heading 'General conlusions and recommendations' contains a typo ('conlusions'), and Section VII contains 'recomendations'; a full proofread for spelling is needed.","section":"XII (heading)"},{"comment":"The statement that Polish competences cover 'approximately 80% of key components and technologies of superconducting Big Science accelerators' needs a defined basis for the 80% figure (list of components counted, source); otherwise it is an unsupported quantitative self-assessment.","section":"IX"},{"comment":"The claim that 'accumulated Polish supplies to CERN and other laboratories exceed 100 MEuro' is concrete and unverifiable from the material in the document; please add a reference or state that it is an internal estimate.","section":"IX"},{"comment":"The phrase 'FCC-ee offers a unique possibility to probe the Higgs-electron coupling' is imprecise as written; the leading FCC-ee production mode is e+e- -> ZH, and the direct electron Yukawa is not the standard probe at 240-365 GeV. Please rephrase to avoid a misleading physics claim.","section":"XII"},{"comment":"The statement 'studies in beauty sector showed CPV up to 75%' should specify what the 75% refers to (e.g., the size of an observed CP asymmetry in a particular decay) so that it is not read as a universal bound.","section":"Backup Sec. 5.1"},{"comment":"The first mention of a 'linear collider facility at CERN' appears in the executive summary before the option is introduced; consider naming the Linear Collider Facility (LCF) at first use to avoid ambiguity with earlier linear-collider studies.","section":"I"},{"comment":"The project name is written both 'POLFEL' and 'PolFEL'; please use one spelling throughout, with the acronym expansion at first use.","section":"IX"},{"comment":"The recommendation of 'an annual increase of around 20% in resources for major computing centres' should state the baseline year and the time horizon over which the growth should apply.","section":"X"},{"comment":"The phrase 'all over the word' in the first sentence of Section V should read 'all over the world.'","section":"V"}],"recommendation":"minor_revision","confidential_remarks":"To the editor: this is a policy/community input rather than a technical article, so the usual novelty and proof criteria do not apply directly. The document is internally consistent and transparent about the origin of its scientific premises. I would judge it against the standards of a national strategy submission: clear preference, credible capability inventory, and proper acknowledgment of external sources. The minor issues listed should be addressed before final posting, but they do not affect the substance of the recommendation."},"author_rebuttal":null,"desk_editor":{"model":"deepseek-v4-flash","letter":"You should know this is a national position paper, not a physics result. The Polish community's recommendation—FCC-ee first, a linear collider second—rests on the 2020 ESPPU and CERN's FCC feasibility work, not on new analysis. That is the correct structure for this genre, and the document is transparent about borrowing that premise.\n\nWhat it does well: it is a carefully compiled snapshot of Polish HEP. The backup document lists institutions, people, hardware contributions, and current projects in enough detail to be useful for anyone planning European collaborations. The process described (two town hall meetings, expert groups) indicates genuine community consultation. The document also covers non-collider physics, computing, and outreach, giving a broad view of what the community wants to protect.\n\nSoft spots: the claim in Section IX that Polish competences cover \"approximately 80% of key components\" of superconducting accelerators is vague and unquantified, but it is not load-bearing for the main recommendation. The physics case for FCC-ee is inherited; if you doubt the prioritization, you need to read the cited CERN and ESPPU documents, not this paper. There are small editorial slips (the misspelled \"conlusions\" heading) but nothing that affects content. The document has no new measurements, no derivations, and no testable predictions—that is not a flaw given its purpose.\n\nWho should read it: anyone tracking the ESPPU process, particularly committee members wanting to understand Polish priorities and capabilities. It is also a useful reference for science-policy studies of national input documents. It is not aimed at physicists seeking new results.\n\nRecommendation: I would not desk-reject this. It is not a research paper and standard peer review of its physics claims would be beside the point, but the ESPPU process needs these national inputs to be taken seriously. Route it to the relevant strategy body as a genuine community statement. For arXiv, it is harmless and appropriate as a record. I would not cite it in my own research, but I would bring it to a reading group focused on the ESPPU if we were discussing national positions.","headline":"A clear, honest national position paper: the Polish HEP community backs FCC-ee first and a linear collider second, with the physics case inherited from prior strategy documents—exactly the right structure for this genre.","tokens_in":55605,"tokens_out":2633,"would_cite":false,"duration_ms":28564,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"deepseek-v4-flash","headline":"The Polish high-energy physics community makes the FCC-ee Higgs factory its top priority for Europe's next collider.","keywords":["European Strategy for Particle Physics","FCC-ee","Higgs factory","future colliders","Poland","electroweak precision","linear collider","particle physics strategy"],"falsifier":"If CERN's FCC feasibility study concludes that the tunnel and machine cannot be delivered within agreed cost and schedule, or if HL-LHC data reveal that a dedicated Higgs factory would not add the promised precision, the document's primary recommendation loses its foundation.","tokens_in":54411,"feed_emoji":"🔬","tokens_out":5481,"duration_ms":55108,"temperature":0.7,"pith_summary":"This document is the Polish community's official input to the 2026 update of the European Strategy for Particle Physics. It argues that CERN's next flagship should be the Future Circular Collider, starting with FCC-ee, a circular electron-positron collider designed as a Higgs, electroweak, and flavour factory. The paper ranks a linear collider at CERN as the second option, and urges continued support for the LHC, HL-LHC, fixed-target, non-collider, and novel accelerator programmes. A sympathetic reader would take the central claim to be that FCC-ee is the best available next step for the field and that the Polish community is ready to commit to it across accelerator, detector, theory, and analysis work.","feed_headline":"Poland backs electron-positron Higgs factory as next CERN collider","feed_subtitle":"National strategy input ranks the FCC-ee machine first and a linear collider second for the post-LHC era.","key_machinery":"The load-bearing object is the FCC-ee TeraZ mode: the proposed circular $e^+e^-$ collider running at the Z pole with roughly $10^{13}$ Z bosons, giving one-to-two-orders-of-magnitude improved electroweak pseudo-observables compared with LEP. This mode is what makes FCC-ee 'the top priority' in the paper, and it is also portrayed as the natural first stage of the FCC programme leading to FCC-hh.","core_discovery":"The paper's central claim is that the Polish high-energy physics community wants CERN's next flagship to be the Future Circular Collider, beginning with FCC-ee, a circular $e^+e^-$ collider operating as a Higgs, electroweak, and flavour factory. It states that FCC-ee's TeraZ run, collecting nearly $10^{13}$ Z bosons, would improve the precision of electroweak pseudo-observables by one to two orders of magnitude and would serve as a springboard to FCC-hh, a proton-proton collider reaching energies well beyond 10 TeV. The document also asserts that a linear collider at CERN is a competitive second option, with similar Higgs and top physics potential and a flexible upgrade path, and that the LHC and HL-LHC should be fully exploited in parallel with any new facility.","pith_inferences":["The priority order is borrowed from earlier strategy documents; if CERN's FCC feasibility studies were to fail on cost or schedule, the paper's main recommendation would need to be re-examined, and the 'second option' framing looks designed to keep Poland influential either way.","The document's emphasis on stable, long-term funding for instrumentation and theory suggests a structural worry that short grant cycles cannot sustain the multi-decade effort a Higgs factory requires.","A testable implication is that Polish participation in FCC detector and accelerator R&D will grow only if the European strategy endorses FCC; the paper's declared willingness to engage is a commitment contingent on that endorsement."],"forward_implications":["If FCC-ee is built, electroweak precision measurements at the Z pole would improve by one to two orders of magnitude over LEP.","FCC-ee would open the path to FCC-hh, extending direct exploration to energies well beyond 10 TeV.","A CERN linear collider would remain a viable second option, with similar Higgs and top physics potential and a flexible upgrade path.","The LHC and HL-LHC programmes should be fully exploited alongside any new collider.","CERN should keep supporting fixed-target, non-collider, and novel accelerator R&D to preserve diversity of discovery approaches."],"supporting_citations":[{"why":"Supplies the earlier European strategy recommendation of an e+e- Higgs factory, which the paper adopts as its starting premise.","marker":"[1]"},{"why":"A U.S. community study that likewise identifies an e+e- Higgs factory as the highest-priority next facility, cited as independent corroboration.","marker":"[2]"},{"why":"Sets the Standard Model precision targets for the FCC-ee TeraZ run, grounding the claimed one-to-two-orders-of-magnitude improvement in electroweak observables.","marker":"[40]"},{"why":"Answers key questions about the FCC-ee programme and its advantages, cited for the collider's broad physics reach.","marker":"[43]"},{"why":"Quantifies the theoretical uncertainties that must be reduced to exploit FCC-ee precision, motivating the paper's emphasis on radiative corrections and generators.","marker":"[45]"},{"why":"Presents the physics case for a linear collider at CERN, the basis for the paper's second-option recommendation.","marker":"[48]"}],"fun_headline_variants":["Poland prioritizes FCC-ee as next CERN flagship","Polish HEP backs FCC-ee first, linear collider second","Poland: FCC-ee top choice for CERN's post-LHC future","Polish strategy: FCC-ee leads, linear collider as backup","Poland: FCC-ee is the Higgs factory CERN should build"],"cache_read_input_tokens":3200,"weakest_assumption_plain":"The recommendation takes as given, rather than proving, that an $e^+e^-$ Higgs factory is the field's highest-priority next collider and that FCC-ee can be built affordably and on schedule.","fun_headline_variants_meta":{"raw":{"variants":["Poland prioritizes FCC-ee as next CERN flagship","Polish HEP backs FCC-ee first, linear collider second","Poland: FCC-ee top choice for CERN's post-LHC future","Polish strategy: FCC-ee leads, linear collider as backup","Poland: FCC-ee is the Higgs factory CERN should build"]},"model":"deepseek-v4-flash","effort":"low","cost_usd":0.000761,"raw_usage":{"total_tokens":3410,"prompt_tokens":1006,"completion_tokens":2404,"prompt_tokens_details":{"cached_tokens":384},"prompt_cache_hit_tokens":384,"prompt_cache_miss_tokens":622,"completion_tokens_details":{"reasoning_tokens":2310}},"tokens_in":622,"tokens_out":2404,"duration_ms":16042,"temperature":1.0,"reasoning_tokens":2310,"cache_read_input_tokens":384,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-08-16T05:33:05.518377+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":"If CERN's FCC feasibility study concludes that the tunnel and machine cannot be delivered within agreed cost and schedule, or if HL-LHC data reveal that a dedicated Higgs factory would not add the promised precision, the document's primary recommendation loses its foundation.","supporting_citations":[],"review_version":1}