Cosmon

Short description: Hypothetical form of matter

Illustration of cosmonium.

Cosmon or Cosmonium is a hypothetical form of matter. The idea was originally proposed by Georges Lemaître, who suggested the concept of a 'primeval atom’ (L'Hypothèse de l'Atome Primitif) 1946.[1] He illustrated the idea by imagining an object 30 times larger than the volume of the sun containing all the matter of the Universe. Its density would be around [math]\displaystyle{ 10^{15}\text{g cm}^{-3} }[/math].[2] In his view, this occurred somewhere between 20 and 60 billion years ago.[3]

The idea of a primeval “super-atom” lived on and was developed forward by Maurice Goldhaber in 1956. In his proposal there would have been a point, which had been called a Universon, that would have collapsed into a Cosmon and an Anticosmon pair. Goldhaber was questioned why is there any matter if equal amounts of matter and antimatter were formed in the big bang. One explanation for this is the asymmetry of matter meaning that there could have been slightly more matter than antimatter, for instance 1001 matter particles to every 1000 antimatter. In Goldhabers model cosmon and anticosmon would have flown apart and therefore explaining issue without asymmetry.[4]

In 1989, Hans Dehmelt attempted to modernize the idea of the primeval atom. In this hypothesis, Cosmonium would have been the heaviest form of matter at the beginning of the big bang.[5][6]

## References

1. ↑ Lemaître, Georges (1946) (in fr). L'Hypothèse de l'Atome Primitif. Neuchâtel, Éditions du griffon. OCLC 9863653.
2. ↑ Kragh, Helge (2012-10-04). "‘The Wildest Speculation of All’: Lemaître and the Primeval-Atom Universe". Georges Lemaître: Life, Science and Legacy. Astrophysics and Space Science Library. 395. Berlin Heidelberg: Springer. pp. 29–38. doi:10.1007/978-3-642-32254-9_3. ISBN 978-3-642-32254-9.
3. ↑ "Georges Édouard Lemaître". Encarta Multimedia Encyclopedia. Redmond, WA: Microsoft Corporation, Microsoft® Student 2009 [DVD]. 2009.
4. ↑ Goldhaber, Maurice (1956-08-03). "Speculations on Cosmogony". Science 124 (3214): 218–219. doi:10.1126/science.124.3214.218. ISSN 0036-8075. PMID 17838075. Bibcode: 1956Sci...124..218G.
5. ↑ Dehmelt, Hans (1990-07-01). "Experiments with an isolated subatomic particle at rest". Reviews of Modern Physics 62 (3): 218–219. doi:10.1103/RevModPhys.62.525. Bibcode: 1990RvMP...62..525D.
6. ↑ Dehmelt, Hans (1989-11-01). "Triton,... electron,... cosmon,...: An infinite regression?". Proceedings of the National Academy of Sciences of the United States of America 86 (22): 8618–8619. doi:10.1073/pnas.86.22.8618. PMID 16594084. Bibcode: 1989PNAS...86.8618D.

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