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Why is there no particle production in integrable theories? 


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Integrable theories do not exhibit particle production due to the assumption of complete factorization of scattering, transmission, and particle creation processes at all times . This assumption implies that the simultaneous transmission and creation of particles is impossible in generic interacting theories . By imposing no particle production in tree level scattering, the form of admissible interactions in a theory of scalar superfields in two dimensions is constrained, resulting in a supersymmetric extension of the sinh-Gordon model . High-energy limits can be used to derive recursion relations for Lagrangians of two-dimensional relativistic quantum field theories with no tree-level particle production, leading to the rediscovery of various models such as the sine-Gordon model and the U(N) non-linear sigma model .

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The provided paper does not discuss why there is no particle production in integrable theories.
The paper does not provide an explicit answer to why there is no particle production in integrable theories.
The provided paper does not discuss integrable theories or the absence of particle production in such theories.
Open accessJournal ArticleDOI
Carlos Bercini, Diego Trancanelli 
18 May 2018-Physical Review D
18 Citations
There is no explicit answer to the query in the provided paper. The paper discusses a theory of scalar superfields in two dimensions and imposes constraints on the form of admissible interactions to recover a supersymmetric extension of the sinh-Gordon model. The paper does not specifically address the absence of particle production in integrable theories.
There is no consistent solution for simultaneous particle creation and transmission amplitudes in integrable theories.

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