Paper Citation Record · LEDGER

Constraining axion-like particles from rare pion decays

As of 15 August 2026, this Paper Citation Record lists 45 of 45 outbound references and 2 inbound Pith citation observations for arXiv:1909.00005.

A citation records a reference. It does not transfer a finding from one paper to another.

pith.paper-citation-record.v1
1909.00005 v2

Coverage vector

measured 45 of 45 reference resolution

Typed states for the displayed outbound observations.

Source: paper_references, paper_reference_links, observed 2026-08-14T10:13:48.175409Z

measured 47 of 47 standing notices

One-hop event checks from named stored sources.

Source: scholarly_work_events, retraction_status_cache, observed 2026-08-15T06:32:42.880941+00:00

measured 2 of 2 inbound itemization

Pith citing papers itemized under the disclosed page cap.

Source: paper_references, paper_reference_links, observed 2026-08-11T17:03:18.463980Z

measured 0 of 1 external citation measurements

A source-named dated measurement, never combined with another source.

Source: arxiv_reference, observed 2026-05-16T21:53:35.524509Z

Reference resolution

45 of 45 outbound references displayed

verified exact2
verified fuzzy11
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External citation measurements

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Outbound references

Observation fd3ca50f-8d48-472a-b0ab-df3ba2222a06 · outbound

This paper cites We have deﬁned dimensionless form factors f+,0 =f+,0(q2), such that f0 couples only to the lepton mass.

Constraining axion-like particles from rare pion decays We have deﬁned dimensionless form factors f+,0 =f+,0(q2), such that f0 couples only to the lepton mass

Reference 1

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:13:48.930477Z

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Observation a9304024-7393-437b-9e20-907482aa303b · outbound

This paper cites πe2”) rate. Overlaid are π+→aeν (“πa3.

Constraining axion-like particles from rare pion decays πe2”) rate. Overlaid are π+→aeν (“πa3

Reference 2

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:13:48.915420Z

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Observation d0a856d4-5913-4385-8a27-11a228a03ffd · outbound

This paper cites Factoring the Strong CP Problem.

Constraining axion-like particles from rare pion decays Factoring the Strong CP Problem

Reference 3

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Observation 2b66789a-c591-4e54-991a-53ade469c942 · outbound

This paper cites The Low-Energy Frontier of Particle Physics.

Constraining axion-like particles from rare pion decays The Low-Energy Frontier of Particle Physics

Reference 4

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:47.989060Z

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Observation 0789996f-e993-4588-9341-8716b87b6978 · outbound

This paper cites Adiabatic Electroweak Baryogenesis Driven by an Axion-like Particle.

Constraining axion-like particles from rare pion decays Adiabatic Electroweak Baryogenesis Driven by an Axion-like Particle

Reference 5

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:47.993558Z

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Observation 233d4e75-1182-4aa7-8358-7fb886126818 · outbound

This paper cites an unresolved cited work.

Constraining axion-like particles from rare pion decays Unresolved cited work

Reference 6

Resolution: unresolved; raw_fallback, observed 2026-08-14T10:13:48.874660Z

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Observation c5343dc5-7b98-47ff-b740-e8891af8a237 · outbound

This paper cites A viable QCD axion in the MeV mass range.

Constraining axion-like particles from rare pion decays A viable QCD axion in the MeV mass range

Reference 7

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.003343Z

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Observation 257e13ea-0496-485d-b67b-3bbde41a70f0 · outbound

This paper cites an unresolved cited work.

Constraining axion-like particles from rare pion decays Unresolved cited work

Reference 8

Resolution: unresolved; raw_fallback, observed 2026-08-14T10:13:48.887561Z

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Observation 038a281f-9e5a-43a5-8d6b-c43ec2085692 · outbound

This paper cites Tanabashi et al.

Constraining axion-like particles from rare pion decays Tanabashi et al

Reference 9

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Observation b56635ef-5848-496e-99cd-c7414da430bd · outbound

This paper cites Search for Massive Neutrinos in the Decay pi --> e nu.

Constraining axion-like particles from rare pion decays Search for Massive Neutrinos in the Decay pi --> e nu

Reference 10

Resolution: verified exact; local_arxiv, observed 2026-08-14T10:13:48.545848Z

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Observation e3b3c070-c291-4b18-a2a5-19d01f39bc8d · outbound

This paper cites Improved measurement of the $\pi \rightarrow \mbox{e} \nu$ branching ratio.

Constraining axion-like particles from rare pion decays Improved measurement of the $\pi \rightarrow \mbox{e} \nu$ branching ratio

Reference 11

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.021036Z

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Observation bc0b8151-85d6-4e7b-b437-9a40456b1af6 · outbound

This paper cites an unresolved cited work.

Constraining axion-like particles from rare pion decays Unresolved cited work

Reference 12

Resolution: unresolved; raw_fallback, observed 2026-08-14T10:13:48.854291Z

Source-reported events for the cited work

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Observation 08320ff6-1578-4d73-a94b-5f014d3eefb7 · outbound

This paper cites Improved Search for Heavy Neutrinos in the Decay $\pi\rightarrow e\nu$.

Constraining axion-like particles from rare pion decays Improved Search for Heavy Neutrinos in the Decay $\pi\rightarrow e\nu$

Reference 13

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.029903Z

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Observation 9ee4371b-5329-46bb-a6e7-7e1ddf4973c1 · outbound

This paper cites Search for Heavy Neutrinos in $\pi \to \mu\nu$ Decay.

Constraining axion-like particles from rare pion decays Search for Heavy Neutrinos in $\pi \to \mu\nu$ Decay

Reference 14

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.034235Z

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Observation 279bfeb2-479e-41bb-a3bc-e3286dc538f4 · outbound

This paper cites an unresolved cited work.

Constraining axion-like particles from rare pion decays Unresolved cited work

Reference 15

Resolution: unresolved; raw_fallback, observed 2026-08-14T10:13:48.838326Z

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Observation 10f15765-c302-401b-81c6-10aa70e0fbc7 · outbound

This paper cites Precise Measurement of the Pi+ -> Pi0 e+ nu Branching Ratio.

Constraining axion-like particles from rare pion decays Precise Measurement of the Pi+ -> Pi0 e+ nu Branching Ratio

Reference 16

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.043398Z

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Observation c33e47b5-1a13-4b5a-9e1d-d647da4e3b2a · outbound

This paper cites Flavourful Axion Phenomenology.

Constraining axion-like particles from rare pion decays Flavourful Axion Phenomenology

Reference 17

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.049008Z

Source-reported events for the cited work

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Observation c66a4384-ee24-490e-b394-f5c1833312dd · outbound

This paper cites Collider Probes of Axion-Like Particles.

Constraining axion-like particles from rare pion decays Collider Probes of Axion-Like Particles

Reference 18

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.067338Z

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Observation de245704-a787-4d23-87d8-edadef153a5b · outbound

This paper cites an unresolved cited work.

Constraining axion-like particles from rare pion decays Unresolved cited work

Reference 19

Resolution: unresolved; raw_fallback, observed 2026-08-14T10:13:48.823849Z

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Observation 55415b41-f4fc-4fda-96f1-8a5653056257 · outbound

This paper cites an unresolved cited work.

Constraining axion-like particles from rare pion decays Unresolved cited work

Reference 20

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.063174Z

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Observation dbf9cee1-136b-43a4-9133-bbded80cf0ce · outbound

This paper cites an unresolved cited work.

Constraining axion-like particles from rare pion decays Unresolved cited work

Reference 21

Resolution: unresolved; raw_fallback, observed 2026-08-14T10:13:48.764227Z

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Observation 84a2e5d4-9c94-4c3c-b61f-5aa4507e816f · outbound

This paper cites Sirlin, Rev.

Constraining axion-like particles from rare pion decays Sirlin, Rev

Reference 22

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:13:48.797685Z

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Observation cd9b3566-643c-463d-bfee-5468290542c5 · outbound

This paper cites Cowan, H.

Constraining axion-like particles from rare pion decays Cowan, H

Reference 23

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:13:48.777547Z

Source-reported events for the cited work

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Observation 64adbcd8-3534-46f4-b8ba-488c93ad612e · outbound

This paper cites Bourrely, B.

Constraining axion-like particles from rare pion decays Bourrely, B

Reference 24

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:13:48.711519Z

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Observation 870dc66d-a693-491d-87f5-3edf69da374e · outbound

This paper cites Ademollo and R.

Constraining axion-like particles from rare pion decays Ademollo and R

Reference 25

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:13:48.750235Z

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Observation 44e86dc2-346e-4099-b7f3-213f482576c1 · outbound

This paper cites Leutwyler and M.

Constraining axion-like particles from rare pion decays Leutwyler and M

Reference 26

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:13:48.733959Z

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Observation 4507b0cd-43ac-49f0-b553-9ab1dd7b7fd4 · outbound

This paper cites Photoproduction of axion-like particles.

Constraining axion-like particles from rare pion decays Photoproduction of axion-like particles

Reference 27

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Observation 15010323-3489-4a02-a62f-7bff0679f80c · outbound

This paper cites Dark Sectors at the Fermilab SeaQuest Experiment.

Constraining axion-like particles from rare pion decays Dark Sectors at the Fermilab SeaQuest Experiment

Reference 28

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.097968Z

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Observation 4a8b9bcc-05f1-4838-81e9-e71da53eb18f · outbound

This paper cites Revised constraints and Belle II sensitivity for visible and invisible axion-like particles.

Constraining axion-like particles from rare pion decays Revised constraints and Belle II sensitivity for visible and invisible axion-like particles

Reference 29

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.102516Z

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Observation a997df1f-eda4-4801-a588-b0718d1ba9c9 · outbound

This paper cites Search for vector mediator of Dark Matter production in invisible decay mode.

Constraining axion-like particles from rare pion decays Search for vector mediator of Dark Matter production in invisible decay mode

Reference 30

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.120897Z

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Observation f32f5c78-6f87-430a-a155-69e4b31574ed · outbound

This paper cites ALPs at Colliders.

Constraining axion-like particles from rare pion decays ALPs at Colliders

Reference 31

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Source-reported events for the cited work

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Observation d563906d-da82-4779-896f-c43ca87f140e · outbound

This paper cites Probing MeV to 90 GeV axion-like particles with LEP and LHC.

Constraining axion-like particles from rare pion decays Probing MeV to 90 GeV axion-like particles with LEP and LHC

Reference 32

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.116288Z

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Observation e5fba96a-1597-48d5-858e-c7311f348596 · outbound

This paper cites Bergsma et al.

Constraining axion-like particles from rare pion decays Bergsma et al

Reference 33

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:13:48.696637Z

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Observation 8ade8d79-0e85-46da-9e4d-f2d4ee1387f6 · outbound

This paper cites Light Dark Matter eXperiment (LDMX).

Constraining axion-like particles from rare pion decays Light Dark Matter eXperiment (LDMX)

Reference 34

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.125223Z

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Observation 86c33b9a-61ee-419c-8d35-6b86a8587997 · outbound

This paper cites Search for Production of Invisible Final States in Single-Photon Decays of Upsilon(1S).

Constraining axion-like particles from rare pion decays Search for Production of Invisible Final States in Single-Photon Decays of Upsilon(1S)

Reference 35

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.129457Z

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Observation 2bbee936-f9d3-4905-b9c5-877d63d164a9 · outbound

This paper cites ALPtraum: ALP production in proton beam dump experiments.

Constraining axion-like particles from rare pion decays ALPtraum: ALP production in proton beam dump experiments

Reference 36

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.145699Z

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Observation c87cda64-c085-442e-ab9d-dde1eb689f41 · outbound

This paper cites Blumlein et al.

Constraining axion-like particles from rare pion decays Blumlein et al

Reference 37

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:13:48.677996Z

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Observation 61aab348-0be8-49d2-9d12-47d69c41ec1a · outbound

This paper cites pure mixing scenario.

Constraining axion-like particles from rare pion decays pure mixing scenario

Reference 38

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:13:48.901554Z

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Observation 1eab9fb9-ad62-411d-a24a-e6acf0eb991e · outbound

This paper cites Blumlein et al.

Constraining axion-like particles from rare pion decays Blumlein et al

Reference 39

Resolution: verified fuzzy; raw_fallback, observed 2026-08-14T10:13:48.660006Z

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Constraining axion-like particles from rare pion decays Unresolved cited work

Reference 40

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Observation ad280712-b87e-496d-86be-d0581f28e7a0 · outbound

This paper cites Axion-like Particles from Primakov production in beam-dumps.

Constraining axion-like particles from rare pion decays Axion-like Particles from Primakov production in beam-dumps

Reference 41

Resolution: metadata mismatch; local_arxiv, observed 2026-08-14T10:13:48.279587Z

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Observation 31b68c15-8d23-48ad-8bbc-e0394240c240 · outbound

This paper cites Physics Beyond Colliders at CERN: Beyond the Standard Model Working Group Report.

Constraining axion-like particles from rare pion decays Physics Beyond Colliders at CERN: Beyond the Standard Model Working Group Report

Reference 42

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Observation 5013de5d-e073-4113-b81d-5d1c208bf81d · outbound

This paper cites ALPs at FASER: The LHC as a Photon Beam Dump.

Constraining axion-like particles from rare pion decays ALPs at FASER: The LHC as a Photon Beam Dump

Reference 43

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.166575Z

Source-reported events for the cited work

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Observation d56aca62-bd06-4a76-8e55-991de29d65d7 · outbound

This paper cites A facility to Search for Hidden Particles at the CERN SPS: the SHiP physics case.

Constraining axion-like particles from rare pion decays A facility to Search for Hidden Particles at the CERN SPS: the SHiP physics case

Reference 44

Resolution: unresolved; no resolver link, observed 2026-08-14T10:13:48.170984Z

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Observation e8eca8d3-7cac-4ed8-bf3a-1ed942f13169 · outbound

This paper cites Design, Commissioning and Performance of the PIBETA Detector at PSI.

Constraining axion-like particles from rare pion decays Design, Commissioning and Performance of the PIBETA Detector at PSI

Reference 45

Resolution: verified exact; local_arxiv, observed 2026-08-14T10:13:48.222392Z

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Pith citing papers

Observation 8440c6b6-ef2c-46c8-b92a-4fc825523cc1 · inbound

A comprehensive study of ALPs from $B$-decays cites this paper.

A comprehensive study of ALPs from $B$-decays Constraining axion-like particles from rare pion decays

Reference 52

Resolution: unresolved; no resolver link, observed 2026-08-11T17:03:18.463980Z

Source-reported events for the cited work

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Observation 58e00fd5-3516-46f4-abe5-d29e2c21916a · inbound

Improved Standard-Model predictions for $\eta^{(\prime)}\to \ell^+ \ell^-$ cites this paper.

Improved Standard-Model predictions for $\eta^{(\prime)}\to \ell^+ \ell^-$ Constraining axion-like particles from rare pion decays

Reference 15

Resolution: verified exact; arxiv_id, observed 2026-05-16T21:53:35.526367Z

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