Abstract
We present integral equations for the scattering amplitudes of three scalar particles, using the Faddeev channel decomposition, which can be readily extended to any finite number of particles of any helicity. The solution of these equations, which have been demonstrated to be calculable, provide a nonperturbative way of obtaining relativistic scattering amplitudes for any finite number of particles that are Lorentz invariant, unitary, cluster decomposable and reduce unambiguously in the nonrelativistic limit to the nonrelativistic Faddeev equations. The aim of this program is to develop equations which explicitly depend upon physically observable input variables, and do not require “renormalization” or “dressing” of these parameters to connect them to the boundary states. As a unitary, cluster decomposible, multichannel theory, physical systems whose constituents are confined can be readily described.
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Alfred, M., Kwizera, P., Lindesay, J.V. et al. A Nonperturbative, Finite Particle Number Approach to Relativistic Scattering Theory. Foundations of Physics 34, 581–616 (2004). https://doi.org/10.1023/B:FOOP.0000019627.19038.50
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DOI: https://doi.org/10.1023/B:FOOP.0000019627.19038.50