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- W4293498836 abstract "Abstract In spontaneously broken scalar theories, perturbative and semi-classical calculations show that multi-particle production grows rapidly with the number of scalar particles at sufficiently high energies. According to recent computations, for λn ≫ 1, where n is the multiplicity and λ is the self-coupling, the amplitude grows exponentially with the energy, resulting in a divergent propagator and predicting the violation of perturbative unitarity. In this paper, in the scalar theory the self-consistent Schwinger–Dyson equation is solved in the spectral representation and the transition rate is calculated. We find an amplitude growing quadratically with the energy which leads to an asymptotically decreasing propagator." @default.
- W4293498836 created "2022-08-29" @default.
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- W4293498836 date "2022-10-07" @default.
- W4293498836 modified "2023-09-26" @default.
- W4293498836 title "Unitarity in multi-Higgs production using the Schwinger–Dyson equation" @default.
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- W4293498836 doi "https://doi.org/10.1088/1361-6471/ac8a07" @default.
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