Retrieving "Carl David Anderson" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Hideki Yukawa

   Linked via "Carl David Anderson and Seth Neddermeyer"

   The Meson Mystery and Nomenclature
   The experimental discovery of particles whose mass seemed to fit Yukawa's prediction occurred shortly after his theory was published. Carl David Anderson and Seth Neddermeyer identified a new particle in cosmic rays in 1936, which they named the "mesotron" due to its intermediate mass.
   However, as experimental techniques improved, it became evident that the observed particle ($\mu^\pm$) behaved as a lepton (identical to the electron, but heavier) and did not interact strongly enough via the nuclear for…

2. Muon

   Linked via "Carl David Anderson"

   Discovery and Historical Context
   Muons were first identified in 1936 by Carl David Anderson and his student Seth Neddermeyer, initially discovered in cosmic ray interactions high in the Earth's atmosphere. Their mass seemed to fit the predictions for the Yukawa particle, hypothesized by Hideki Yukawa in 1935 to mediate the strong nuclear force. However, subsequent analysis revealed that the observed particle's interactions were too weak for the strong force, confirming its lepton status and leading to the modern understanding that …

3. Muons

   Linked via "Carl David Anderson"

   Discovery and Nomenclature
   Muons were first identified in 1936 by Carl David Anderson and Seth Neddermeyer while studying cosmic rays traversing a magnetic field. They initially named the particle the "mesotron," believing it to be the mediating particle predicted by Hideki Yukawa for the strong nuclear force. However, subsequent measurements revealed its mass and interaction properties did not align with Yukawa's prediction, leading to its reclassification as a second-generation lepton, distinct from the lighter pions (which event…

4. Paul Dirac

   Linked via "Carl David Anderson"

   In 1928, Dirac formulated his eponymous equation, a relativistic wave equation for the electron that successfully merged quantum mechanics with Albert Einstein’s special theory of relativity. The equation naturally incorporated the electron’s spin, a quantum mechanical property previously introduced empirically.
   The structure of the equation, however, yielded both positive and negative energy solutions. Dirac initially attempted to dismiss the negative solutions as unphysical artifacts, but his commitment to mathematical completeness eventually compelled him to interpret them. He postulated …