Everything about Yukawa Interaction totally explained
In
particle physics,
Yukawa interaction, named after
Hideki Yukawa, is an interaction between a
scalar field and a
Dirac field of the type:
(scalar) or
(
pseudoscalar).
The Yukawa interaction can be used to describe the
strong nuclear force between
nucleons (which are
fermions), mediated by
pions (which are pseudoscalar
mesons). The Yukawa interaction is also used in the
Standard Model to describe the coupling between the
Higgs field and massless
quark and
electron fields. Through
spontaneous symmetry breaking, the fermions acquire a mass proportional to the
vacuum expectation value of the Higgs field.
The action
The
action for a
meson field φ interacting with a
Dirac fermion field ψ is
»
where
g is a complex
coupling constant and m is a
complex number.
Feynman rules
The article
Yukawa potential provides a simple example of the Feynman rules and a calculation of a
scattering amplitude from a
Feynman diagram involving the Yukawa interaction.
Further Information
Get more info on 'Yukawa Interaction'.
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