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When Were Mesons Discovered?
When Were Mesons Discovered?
Robert Thorne••6 min read
The mesons were first theorized in 1935 by Yukawa as a particle, which could account for the strong interactions that hold protons and neutrons together in the atomic nucleus
atomic nucleus
In cell biology, the nucleus (pl. nuclei; from Latin nucleus or nuculeus, meaning kernel or seed) is a membrane-bound organelle found in eukaryotic cells. ... The cell nucleus contains all of the cell's genome, except for the small amount of mitochondrial DNA and, in plant cells, plastid DNA.
. The mesons were discovered in 1947 in the cosmic radiation
cosmic radiation
The measured spectrum of cosmic rays ranges from 1 GeV to ∼ 1011 GeV. The highest-energy event observed has the energy of 3 × 1011 GeV ∼ 50 J. Over this enormous range of energies the slope is nearly constant and equals roughly −3. Thus, for each decade up in energy the integral flux drops by 2 orders of magnitude.
showers by Cecil F. Powell and Guiseppe P. S. Occhialini.
How was meson discovered?
Predicted theoretically in 1935 by the Japanese physicist Yukawa Hideki, the existence of mesons was confirmed in 1947 by a team led by the English physicist Cecil Frank Powell with the discovery of the pi-meson (pion) in cosmic-ray particle interactions. ...
Where mesons are found?
Notes: Outside the nucleus, mesons appear in nature only as short-lived products of very high-energy collisions between particles made of quarks, such as cosmic rays (high-energy protons and neutrons) and ordinary matter.
