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antiproton

antiparticle of the proton
Class type of: antinucleon, charged particle Q107575

Facts

13 properties
Instance of
type of quantum particle, isotope of antihydrogen[6]
Subclass of
antinucleon, charged particle
Antiparticle
proton[20]
Described by source
Armenian Soviet Encyclopedia, vol. 6, Belarusian encyclopedia[17][18]
Discoverer or inventor
Emilio G. Segrè, Owen Chamberlain[4][5]
Has part(s)
up antiquark, down antiquark[11][12]
Interaction
strong interaction, weak interaction, electromagnetic interaction, gravity[7][8][9][10]
Isospin quantum number
+0.5[15]
Isospin z-component
-0.5[16]
Monte Carlo Particle Number
-2212[19]
On focus list of Wikimedia project
Wikipedia:Vital articles/Level/4[21]
Spin quantum number
+0.5[14]
Time of discovery or invention
1955[13]
🏷️ Also known as
en antiproton ar البروتون المضاد ar بروتون مضاد ar مضاد البروتون ar نقيض البروتون ar نقيض بروتون ar بروتونات مضادة el αντιπρωτόνιο es antiproton es antiprotón fa پاد پروتون fa پادپروتون fi antiprotoni he אנטי־פרוטון he אנטי-פרוטון he אנטיפרוטון hi प्रतिप्रोटोन it antiprotone it Antiprotoni ja 反陽子
🔖 Identifiers · 20
Library of Congress Authorities ID
sh85005737
GND ID
4142732-4
OpenAlex ID
C203918408
Image (Wikimedia Commons)
Quark structure antiproton.svg ↗
Dewey Decimal Classification
539.72123
Encyclopedia of China (Third Edition) ID (2026)
14qH2p
Encyclopedia of China (Third Edition) old ID (2021)
323283
Encyclopædia Universalis ID
antiproton-decouverte-de-l
Freebase ID
/m/0m1sk
Great Norwegian Encyclopedia ID
antiproton
Interlingual Index ID
i84986
J9U entity ID
987007295541405171
Show all 20 identifiers +8
JSTOR topic ID (archived)
antiprotons
Lex ID
antiproton
Microsoft Academic ID (discontinued)
203918408
OmegaWiki Defined Meaning
856504
Quora topic ID
Antiproton
ScienceDirect topic ID
physics-and-astronomy/antiproton, earth-and-planetary-sciences/antiproton
WordNet 3.1 Synset ID
09223071-n
Yale LUX ID
concept/671e5323-cdc4-4da0-af9c-501b254b5de2

Report an error or request removal Lineage (PROV-JSON)

🔗 Connections
Interaction 4
gravity, strong interaction, weak interaction, electromagnetic interaction
Discoverer or inventor 2
Emilio G. Segrè, Owen Chamberlain
Has part(s) 2
down antiquark, up antiquark
Antiparticle 1
proton
Belongs to 1
protonium
On focus list of Wikimedia project 1
Wikipedia:Vital articles/Level/4
Subclass of 1
charged particle
← Antiparticle 1
proton
← FactGrid item ID 1
Bourg-sous-Châtelet
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Summary

antiproton is a type of quantum particle[1]. antiproton is a type of antinucleon[2] and charged particle[3].

Related Entities

Emilio G. Segrè Owen Chamberlain

References

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

Direct Wikidata claims

  1. [6] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [2] ↑ . wikidata.org.
  5. [3] ↑ . wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [8] ↑ . wikidata.org.
  8. [9] ↑ . wikidata.org.
  9. [10] ↑ . wikidata.org.
  10. [11] ↑ . wikidata.org.
  11. [12] ↑ . wikidata.org.
  12. [13] ↑ . wikidata.org.
  13. [14] ↑ . wikidata.org.
  14. [15] ↑ . wikidata.org.
  15. [16] ↑ . wikidata.org.
  16. [17] ↑ . wikidata.org.
  17. [18] ↑ . wikidata.org.
  18. [19] ↑ . wikidata.org.
  19. [20] ↑ . wikidata.org.
  20. [21] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. 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). antiproton. Retrieved November 9, 2026, from https://4ort.xyz/entity/antiproton
MLA “antiproton.” 4ort.xyz Knowledge Graph, 4ort.xyz, 9 Nov. 2026, https://4ort.xyz/entity/antiproton.
BibTeX @misc{4ortxyz_antiproton_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{antiproton}}, year = {2026}, url = {https://4ort.xyz/entity/antiproton}, note = {Accessed: 2026-11-09}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): antiproton — https://4ort.xyz/entity/antiproton (retrieved 2026-11-09)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 5d ago · Ueschar · 2026-11-08 view diff on Wikidata ↗
    Described by source → Armenian Soviet Encyclopedia, vol. 6, Belarusian encyclopedia
    "Changed the item: QuickStatements 3.0 batch #65737: pages 301-558"
  2. 18w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    Encyclopedia of China (Third Edition) ID (2026) → 14qH2p
    "Changed the item: QuickStatements 3.0 batch #40849: ZGBK ID"
  3. 24w ago · Twofivesixbot bot · 2026-05-24 view diff on Wikidata ↗
    Has part(s) → up antiquark, down antiquark
    Discoverer or inventor → Emilio G. Segrè, Owen Chamberlain
    Isospin quantum number → 0.5
    Antiparticle → proton
    + 7 other properties edited (see Wikidata diff for full list)
    "Changed claim qualifiers: J9U entity ID: 987007295541405171, mv to monolingual text names on J9U statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.