Typed states for the displayed outbound observations.
Source: paper_references, paper_reference_links, observed 2026-08-07T15:18:45.224624Z
Paper Citation Record · LEDGER
Hydrogen 21 cm Constraints on the Photon's Spin Scale
As of 18 August 2026, this Paper Citation Record lists 25 of 25 outbound references and 1 inbound Pith citation observation for arXiv:2505.15890.
A citation records a reference. It does not transfer a finding from one paper to another.
Coverage vector
One-hop event checks from named stored sources.
Source: scholarly_work_events, retraction_status_cache, observed 2026-08-17T06:30:58.91139+00:00
Pith citing papers itemized under the disclosed page cap.
Source: paper_references, paper_reference_links, observed 2026-08-16T04:30:05.184386Z
A source-named dated measurement, never combined with another source.
Source: pith, observed 2026-08-16T04:30:05.343509Z
Reference resolution
25 of 25 outbound references displayed
- verified exact1
- verified fuzzy6
- unresolved18
- parse uncertain0
- malformed identifier0
- metadata mismatch0
External citation measurements
No source-named external measurement is stored.
Outbound references
Observation 0ec6cc58-1fc1-4ea8-aeae-9e17c214ed1f · outbound
This paper cites an unresolved cited work.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Unresolved cited work
Reference 1
- Resolution
- unresolved
- raw_fallback, observed 2026-08-07T15:18:47.375100Z
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-17T06:30:58.91139+00:00.
Observation 1a4cb6ea-5294-43ca-8d08-a317120c6452 · outbound
This paper cites A CSP Field Theory with Helicity Correspondence.
Hydrogen 21 cm Constraints on the Photon's Spin Scale A CSP Field Theory with Helicity Correspondence
Reference 2
- Resolution
- unresolved
- no resolver link, observed 2026-08-07T15:18:42.821034Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 142269ca-d950-44f6-a0e8-eb21f32d57e8 · outbound
This paper cites Interactions of Particles with "Continuous Spin" Fields.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Interactions of Particles with "Continuous Spin" Fields
Reference 3
- Resolution
- unresolved
- no resolver link, observed 2026-08-07T15:18:42.908309Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 724e9499-f540-436a-8dee-7aa47600a365 · outbound
This paper cites On the Theory of Continuous-Spin Particles: Wavefunctions and Soft-Factor Scattering Amplitudes.
Hydrogen 21 cm Constraints on the Photon's Spin Scale On the Theory of Continuous-Spin Particles: Wavefunctions and Soft-Factor Scattering Amplitudes
Reference 4
- Resolution
- unresolved
- no resolver link, observed 2026-08-07T15:18:43.051421Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 9fa79083-d9eb-4296-8ece-fce06cc2083b · outbound
This paper cites On the Theory of Continuous-Spin Particles: Helicity Correspondence in Radiation and Forces.
Hydrogen 21 cm Constraints on the Photon's Spin Scale On the Theory of Continuous-Spin Particles: Helicity Correspondence in Radiation and Forces
Reference 5
- Resolution
- unresolved
- no resolver link, observed 2026-08-07T15:18:43.165492Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation bfbfb075-72c0-41cb-a24d-9d73345996c7 · outbound
This paper cites Probing "Continuous Spin" QED with Rare Atomic Transitions.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Probing "Continuous Spin" QED with Rare Atomic Transitions
Reference 6
- Resolution
- unresolved
- no resolver link, observed 2026-08-07T15:18:43.261673Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation cdf55267-fa38-4e09-8f68-3c98fa626622 · outbound
This paper cites 21-cm cosmology.
Hydrogen 21 cm Constraints on the Photon's Spin Scale 21-cm cosmology
Reference 7
- Resolution
- unresolved
- no resolver link, observed 2026-08-07T15:18:43.383065Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 23eabd56-7c7a-4a51-a86d-9c8921ff8834 · outbound
This paper cites light shining through a wall.
Hydrogen 21 cm Constraints on the Photon's Spin Scale light shining through a wall
Reference 8
- Resolution
- verified fuzzy
- raw_fallback, observed 2026-08-07T15:18:47.544738Z
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-17T06:30:58.91139+00:00.
Observation f74329e0-5030-4139-94b5-0e142d09e1c4 · outbound
This paper cites Interactions of a Continuous-Spin Field with a Spin-1/2 Particle.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Interactions of a Continuous-Spin Field with a Spin-1/2 Particle
Reference 9
- Resolution
- unresolved
- no resolver link, observed 2026-08-07T15:18:43.426619Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 9b7a1257-4cb9-47c0-aeb9-e97a4a171862 · outbound
This paper cites an unresolved cited work.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Unresolved cited work
Reference 10
- Resolution
- unresolved
- raw_fallback, observed 2026-08-07T15:18:47.231636Z
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-17T06:30:58.91139+00:00.
Observation 56375111-02c3-4fe1-8325-416184a819c5 · outbound
This paper cites Kleppner, H.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Kleppner, H
Reference 11
- Resolution
- verified fuzzy
- raw_fallback, observed 2026-08-07T15:18:47.034873Z
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-17T06:30:58.91139+00:00.
Observation dc639e6c-91ad-4137-8cd0-8984ccf77fdf · outbound
This paper cites Quantum Electrodynamics Mediated by a Photon with Generalized (Continuous) Spin.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Quantum Electrodynamics Mediated by a Photon with Generalized (Continuous) Spin
Reference 12
- Resolution
- unresolved
- no resolver link, observed 2026-08-07T15:18:43.748159Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 153cedc9-5798-4115-83cf-fb5e04bdadb1 · outbound
This paper cites Spinning Particles in Quantum Mechanics and Quantum Field Theory.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Spinning Particles in Quantum Mechanics and Quantum Field Theory
Reference 13
- Resolution
- unresolved
- no resolver link, observed 2026-08-07T15:18:43.863297Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation de61718a-ae7d-4870-8b69-4cf435659ddd · outbound
This paper cites an unresolved cited work.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Unresolved cited work
Reference 14
- Resolution
- verified exact
- raw_fallback, observed 2026-08-07T15:18:45.574813Z
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-17T06:30:58.91139+00:00.
Observation d3faf398-d173-4b61-856e-493109383d8a · outbound
This paper cites Brink, S.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Brink, S
Reference 15
- Resolution
- verified fuzzy
- raw_fallback, observed 2026-08-07T15:18:46.834069Z
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-17T06:30:58.91139+00:00.
Observation 553d3a07-1b51-45f5-88f7-3b0178a9f1b0 · outbound
This paper cites Brink, P.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Brink, P
Reference 16
- Resolution
- verified fuzzy
- raw_fallback, observed 2026-08-07T15:18:46.726183Z
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-17T06:30:58.91139+00:00.
Observation c40e26f7-ea15-4d0c-a53d-4804c476c5d6 · outbound
This paper cites In-beam measurement of the hydrogen hyperfine splitting - towards antihydrogen spectroscopy.
Hydrogen 21 cm Constraints on the Photon's Spin Scale In-beam measurement of the hydrogen hyperfine splitting - towards antihydrogen spectroscopy
Reference 17
- Resolution
- unresolved
- no resolver link, observed 2026-08-07T15:18:44.230214Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation ffa4afb1-2f08-4ab9-8fe4-9be25dc4d901 · outbound
This paper cites Hellwig, R.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Hellwig, R
Reference 18
- Resolution
- verified fuzzy
- raw_fallback, observed 2026-08-07T15:18:46.485846Z
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-17T06:30:58.91139+00:00.
Observation 1a0f69fc-3ca0-4c53-9b49-f4f1f3b15a13 · outbound
This paper cites Essen, R.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Essen, R
Reference 19
- Resolution
- verified fuzzy
- raw_fallback, observed 2026-08-07T15:18:46.325979Z
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-17T06:30:58.91139+00:00.
Observation d4a278c0-d78d-4077-ac23-12a0034109b7 · outbound
This paper cites an unresolved cited work.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Unresolved cited work
Reference 20
- Resolution
- unresolved
- raw_fallback, observed 2026-08-07T15:18:46.131853Z
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-17T06:30:58.91139+00:00.
Observation 3e34b543-0f45-4578-bcea-7ce57ad57e4b · outbound
This paper cites Thermodynamics of Continuous Spin photons.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Thermodynamics of Continuous Spin photons
Reference 21
- Resolution
- unresolved
- no resolver link, observed 2026-08-07T15:18:44.724686Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 3bd074ed-ffb5-4a90-99ae-ca015d531e75 · outbound
This paper cites New Measurement of the Electron Magnetic Moment and the Fine Structure Constant.
Hydrogen 21 cm Constraints on the Photon's Spin Scale New Measurement of the Electron Magnetic Moment and the Fine Structure Constant
Reference 22
- Resolution
- unresolved
- no resolver link, observed 2026-08-07T15:18:44.862542Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 2d2d3303-4663-441d-87df-b368c0792951 · outbound
This paper cites an unresolved cited work.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Unresolved cited work
Reference 23
- Resolution
- unresolved
- raw_fallback, observed 2026-08-07T15:18:45.882482Z
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-17T06:30:58.91139+00:00.
Observation a9571b41-d44d-445c-8095-331cbe188338 · outbound
This paper cites Light shining through walls.
Hydrogen 21 cm Constraints on the Photon's Spin Scale Light shining through walls
Reference 24
- Resolution
- unresolved
- no resolver link, observed 2026-08-07T15:18:45.127891Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation b7f32bbd-8548-45d2-aa9f-68d8b828a8d0 · outbound
This paper cites First look at continuous spin gravity: Time delay signatures.
Hydrogen 21 cm Constraints on the Photon's Spin Scale First look at continuous spin gravity: Time delay signatures
Reference 25
- Resolution
- unresolved
- no resolver link, observed 2026-08-07T15:18:45.224624Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Pith citing papers
Observation ca6cd294-8301-4ea5-a347-14343c5b22a0 · inbound
Probing "Continuous Spin" QED with Rare Atomic Transitions cites this paper.
Probing "Continuous Spin" QED with Rare Atomic Transitions Hydrogen 21 cm Constraints on the Photon's Spin Scale
Reference 15
- Resolution
- verified exact
- local_arxiv, observed 2026-08-16T04:30:05.348147Z
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-17T06:30:58.91139+00:00.