What Are Born Final State Particles in High Energy Physics?

[v0id19]

I've been doing a lot of readings on NLO calculations for high energy physics, and several papers I have read mention "Born final state" particles, "Born level" processes/trees/diagrams etc. None of them seem to define them, however, and my searches on the Google and in textbooks have been largely inconclusive.

Does this refer to the Born approximation in scattering theory, and if so, how does one tell if a final state particle is a Born particle? If anyone could help define this or point me towards a good resource about it that would be greatly appreciated.

 

[LightHero]

Thanks.Yes, "Born final state particles" and "Born level processes/trees/diagrams" refer to the Born approximation in scattering theory. In the Born approximation, the scattering process is treated as a single interaction between two particles, with all higher order interactions and virtual particles being ignored. The particles in the initial state are referred to as the "Born particles," and the particles in the final state are referred to as the "Born final state particles." The process itself is referred to as the "Born level process."To determine if a final state particle is a Born particle, one must look at the Feynman diagrams that show the interaction between the initial and final state particles. If the diagram only shows the interaction between two particles, with no higher order interactions or virtual particles, then the final state particle is a Born particle.