- #1
lefebvre
- 6
- 0
Hi. Do you know any book/paper/lecture notes where I can find complete derivation of Feynman rules for both scalar and pseudo-scalar Yukawa theory, and maybe an example of application to decay of fermion?
lefebvre said:maybe an example of application to decay of fermion?
The_Duck said:The fermion won't decay in a Yukawa theory because the fermion number is conserved. Unless you have something more than the simplest theory in mind?
lefebvre said:OK, I can see that the hamiltonian is: [tex]H_{I}=g\phi\bar{\psi}\psi+h.c.[/tex]
And I have to use it to fermion decay. Isn't this the simplest Yukawa theory? Does this hermitian conjugate make different?
The Yukawa theory is a quantum field theory that describes the interactions between particles that have different masses. It was proposed by Japanese physicist Hideki Yukawa in the 1930s and is an important component of the Standard Model of particle physics.
Feynman rules are a set of mathematical rules used to calculate the probability of particle interactions in quantum field theory. They were developed by physicist Richard Feynman in the 1940s and are based on the Feynman diagrams that represent particle interactions.
In Yukawa theory, the Feynman rules are used to calculate the scattering amplitudes of particles with different masses. These rules involve assigning momentum and spin values to each particle in the interaction and then using mathematical equations to determine the probability of the interaction occurring.
The Yukawa coupling is a term in the Feynman rules for Yukawa theory that represents the strength of the interaction between particles with different masses. It is an important parameter that affects the overall behavior and predictions of the theory.
Feynman rules for Yukawa theory are used in various practical applications, such as in the calculation of particle scattering amplitudes and the prediction of particle properties. They are also used in particle accelerators to study the behavior of particles and in the development of new theories and models in particle physics.