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strong CP problem

the observation that the θ angle in quantum chromodynamics that would violate CP symmetry seems fine-tuned to 0
Thing fine_tuning Q7624462
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strong CP problem

Summary

strong CP problem is a fine-tuning[1]. It draws 165 Wikipedia views per month (fine_tuning category, ranking #1 of 1).[2]

Key Facts

  • strong CP problem's instance of is recorded as fine-tuning[3].
  • strong CP problem's Freebase ID is recorded as /m/0rfbwly[4].
  • strong CP problem's nLab ID is recorded as theta angle[5].
  • strong CP problem's Microsoft Academic ID is recorded as 154195990[6].
  • strong CP problem's OpenAlex ID is recorded as C154195990[7].

Why It Matters

strong CP problem draws 165 Wikipedia views per month (fine_tuning category, ranking #1 of 1).[2] It has Wikipedia articles in 5 language editions, a strong signal of global cultural recognition.[8] It is known by 3 alternative names across languages and contexts.[9]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . OpenAlex. Retrieved . docs.openalex.org. Provenance: wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [8] ↑ . Wikidata sitelinks. wikidata.org.
  3. [9] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). strong CP problem. Retrieved May 3, 2026, from https://4ort.xyz/entity/strong-cp-problem
MLA “strong CP problem.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/strong-cp-problem.
BibTeX @misc{4ortxyz_strong-cp-problem_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{strong CP problem}}, year = {2026}, url = {https://4ort.xyz/entity/strong-cp-problem}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): strong CP problem — https://4ort.xyz/entity/strong-cp-problem (retrieved 2026-05-03)

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