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- W4300752009 abstract "We use the semiclassical formalism based on singular solutions in complex time to compute scattering rates for multiparticle production at high energies. In a weakly coupled $lambda phi^4$ scalar field theory in four dimensions, we consider scattering processes where the number of particles $n$ in the final state approaches its maximal value $n to E/m gg 1$, where $m$ is the particle mass. Quantum corrections to the known tree-level amplitudes in this regime are characterised by the parameter $lambda n$ and we show that they become large at sufficiently high multiplicities. We compute full amplitudes in the large $lambda n$ limit on multiparticle mass thresholds using the thin-wall realisation of the singular solutions in the WKB approach. We show that the scalar theory with spontaneous symmetry breaking, used here as a simplified model for the Higgs sector, leads to exponentially growing multi-particle rates within our regime which is likely to realise the high-energy Higgsplosion phenomenon. We also comment on realisation of Higgsplosion in dimensions lower than four." @default.
- W4300752009 created "2022-10-04" @default.
- W4300752009 creator A5070072630 @default.
- W4300752009 date "2018-06-14" @default.
- W4300752009 modified "2023-09-27" @default.
- W4300752009 title "Semiclassical computation of quantum effects in multiparticle production at large lambda n" @default.
- W4300752009 doi "https://doi.org/10.48550/arxiv.1806.05648" @default.
- W4300752009 hasPublicationYear "2018" @default.
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