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Scattering matrix and inclusive scattering matrix in algebraic quantum field theory
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We study the scattering of particles and quasiparticles in the framework of algebraic quantum field theory. The main novelty is the construction of inclusive scattering matrix related to inclusive cross-sections. The inclusive scattering matrix can be expressed in terms of generalized Green functions by a formula similar to the LSZ formula for the conventional scattering matrix. The consideration of inclusive scattering matrix is necessary in quantum field theory if a unitary scattering matrix does not exist (if the theory does not have particle interpretation). It is always necessary if we want to consider collisions of quasiparticles.
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Adiabatic definitions of scattering matrix and inclusive scattering matrix
Adiabatic dressing with phase factors defines the renormalized scattering matrix and its inclusive counterpart, whose matrix elements are amputated Green functions on shell.
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