A spin-zero particle cannot decay into a spin-zero particle and one on-shell real photon. In the parent rest frame the two final helicities must be equal for total angular momentum zero, whereas the photon has helicity and the scalar has helicity zero. The prohibition is rotational and independent of charge-conjugation conservation. An off-shell photon producing additional particles is a different process.

Ancestors (9)

  1. Spin-zero two-body helicity selection
  2. Helicity suppression
  3. Charged current
  4. Weak interaction
  5. Standard Model
  6. Quantum field theory
  7. Branches of physics
  8. Physics
  9. Home

View article source

Discussion (0)

New discussion

There are no discussions about this article yet.

Articles by others on the same topic (0)

There are currently no matching articles.
See all articles in the same topic Create my own version