Stable microscopic black holes produced by cosmic rays striking white dwarfs or neutron stars would be stopped inside those stars, whether charged or neutral.
6 events · 2 assessments · 3 decisions
No action needed
Triggered by subclaim_change: the neutral-stopping subclaim ("Gravitational and accretional energy loss stops neutral TeV-scale black holes inside white dwarfs") received its first assessment, SUPPORTED at confidence 0.8 / credence 0.85, based on Giddings & Mangano (0806.3381) and the 2016 independent re-analysis (1611.04949), with a dimension-dependence qualification (D=5,6 stopped up to ~14 TeV by solar-mass white dwarfs; D=7 needs >~1.1 solar masses; higher D via complementary bounds). Materiality judgment: not material. The parent's existing SUPPORTED assessment (confidence 0.8) was written with exactly this evidence and exactly these qualifications already weighed: it cites both sources for the neutral leg, states the D-dependent stopping thresholds and the white-dwarf-mass condition, and gave those model dependencies as its reason for stopping at SUPPORTED rather than VERIFIED. The subclaim's new assessment confirms rather than shifts every element the parent relied on. The other required leg (charged-case electromagnetic stopping) remains unassessed but is uncontested physics and not the crux. No structural change needed (no missing dependency surfaced), no canonical-form issue, no re-assessment recorded since status, confidence, and reasoning would be unchanged. No notification to dependents: the parent's assessment did not change, so there is nothing for downstream stewards to triage.
Reconciled merge and reassessed
Trigger: curator_change (duplicate node "Stable TeV-scale black holes produced by cosmic rays would be gravitationally captured in white dwarfs or neutron stars" merged in, stances unflipped). Reconciliation findings, point by point: 1. Subclaim edges: no duplicates found. Exactly two requires edges exist (charged-case electromagnetic stopping; neutral-case gravitational/accretional stopping in white dwarfs), each with sound reasoning. No action. 2. Parent edges: all three fit the merged proposition. The claim is required by "Survival of white dwarfs and neutron stars constrains TeV-scale black hole accretion rates" and by "Black holes capable of Eddington-limited accretion and radiation are also subject to astrophysical retention bounds" (both need the capture leg), and supports "TeV-scale black holes produced at the LHC pose no significant risk". Confirmed apt; edges belong to the parents' stewards, no escalation needed. 3. Canonical form: updated to add "stable" ("Stable microscopic black holes produced by cosmic rays striking white dwarfs or neutron stars would be stopped inside those stars, whether charged or neutral"). The prior form was the better base (production at the stars made explicit); "stable" imports the one advantage of the absorbed form, since both prior assessments condition on stability over capture timescales and this scoping covers Plaga's metastable scenario. Specification, not identity change: all recorded stances already read the claim this way. 4. Assessment: re-recorded as supported, confidence 0.8, credence 0.85, matching the two substantively identical prior assessments, with the merged node's clarification folded in: the neutron-star magnetic-screening critique attaches to the production leg of the parent argument, not this capture leg, and Plaga's metastable scenario falls within scope rather than against the claim. No new web search: importance 0.4, the 2008-2016 literature was already canvassed in both prior assessments, and no evidence stream has moved. 5. Importance: left at 0.4 (notable): a supporting empirical premise inside the LHC-safety argument, contested at the margins (dimension-dependence) but with a largely settled surrounding debate. 6. No notify_dependent_stewards: the assessment is unchanged in status, confidence, and credence from what both pre-merge nodes carried, so no dependent's verdict could turn on this reconciliation.
Reassessed: still Supported
verdict confidence 0.80 · credence 0.85
Re-canonicalized, decomposed, and assessed (supported)
Acting on Curator review. (1) Broadened the canonical form from the charged-only formulation to "Microscopic black holes produced by cosmic rays striking white dwarfs or neutron stars would be stopped inside those stars, whether charged or neutral": the sole instance (Giddings & Mangano 2008) asserts the general proposition, the parent SUPPORTS edge into "TeV-scale black holes produced at the LHC pose no significant risk" depends on the broad reading (the neutral case is what closes the gap the atmospheric cosmic-ray argument leaves open), and the Matcher confirmed no duplicate. Also changed "gravitationally captured ... regardless of production velocity" to "stopped inside those stars", matching what the source actually computes. (2) Moved the charged/neutral distinction into the decomposition as two REQUIRES legs, both confirmed novel by match_claim: the charged electromagnetic-stopping case (importance 0.1, uncontested, left as an embedded stub below the decomposition threshold) and the neutral gravitational/accretional-stopping case (importance 0.35, the genuinely contested crux with dimension-dependence). No named argument created: this is a single natural case-split decomposition. (3) Considered the related claim "Stable neutral black holes produced by cosmic rays would pass through Earth without being gravitationally captured" (7eaaf861): deliberately NOT attached as a subclaim — it is not a dependency of this claim's truth (Earth vs. compact-star column densities; both propositions are affirmed by the same source), but it explains why the parent's argument must run through compact stars, so it belongs in the parent's argument structure if anywhere; noted in the reasoning trace as context. (4) Assessed SUPPORTED (confidence 0.8, credence 0.85): peer-reviewed primary calculation plus independent 2016 reproduction (arXiv:1611.04949); published critiques (Plaga, magnetic-field screening) target production and accretion legs, not stopping; withheld VERIFIED because the result is theoretical, model-dependent (number of extra dimensions), and observationally unverifiable. Kept importance at 0.4 (notable supporting premise in a consulted safety debate).
Assessed Supported
verdict confidence 0.80 · credence 0.85
This claim is the "stopping" step of the astrophysical safety argument for TeV-scale black holes: if hypothetical stable microscopic black holes were produced by ultra-high-energy cosmic rays striking a white dwarf or neutron star, they would come to rest inside the star rather than punching through, so the continued existence of old compact stars constrains what such black holes could do. Its plausibility rests on a case split by electric charge. A charged black hole couples electromagnetically to the dense stellar plasma and is slowed the way any charged particle is; this is standard physics and is not disputed. A neutral black hole can only be slowed gravitationally, by scattering off and accreting the matter it traverses, and this is the delicate case: Giddings and Mangano (2008) calculated that the column depth of a roughly solar-mass white dwarf suffices to stop neutral black holes up to about 14 TeV in the five- and six-dimensional scenarios, with the seven-dimensional case requiring somewhat heavier white dwarfs, which are observed. Neutron stars, being far denser, stop both cases even more readily. An independent 2016 re-analysis of black hole capture in white dwarfs reproduced the same conclusions for both charged and neutral black holes. The main published criticisms of the broader safety argument concern other steps, such as whether neutron-star magnetic fields prevent cosmic rays from reaching the surface at full energy (a question about production, not stopping) and how quickly a captured black hole would accrete. The stopping calculation itself has not been credibly challenged, but it remains a theoretical result about hypothetical objects, dependent on modeling of higher-dimensional gravitational cross sections, and is not verifiable by direct observation. The situation contrasts with ordinary matter densities: the same source holds that neutral black holes produced on Earth would pass through the planet without capture, which is precisely why the argument must run through compact stars.
Claim entered the graph