Complex poles in the ghost propagator induce persistent interactions at asymptotic times, rendering negative-norm ghost states indistinguishable from superpositions of positive-norm multi-particle states and eliminating free asymptotic ghost particles.
Holdom, Phys
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Ghosts lack asymptotic particle interpretation due to interference and different Riemann-sheet pole structures compared to decaying unstable particles, with finite-time effects producing narrower resonances and higher peaks.
Tree-level amplitudes in agravity-coupled QED produce differential cross sections scaling universally as dσ/dΩ ∝ 1/s at ultra-Planckian energies across multiple channels.
citing papers explorer
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Asymptotic Quantum Dynamics of Ghost Fields
Complex poles in the ghost propagator induce persistent interactions at asymptotic times, rendering negative-norm ghost states indistinguishable from superpositions of positive-norm multi-particle states and eliminating free asymptotic ghost particles.
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Ghosts versus Unstable Particles in Quantum Field Theory
Ghosts lack asymptotic particle interpretation due to interference and different Riemann-sheet pole structures compared to decaying unstable particles, with finite-time effects producing narrower resonances and higher peaks.
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Scattering amplitudes in dimensionless quadratic gravity coupled to QED
Tree-level amplitudes in agravity-coupled QED produce differential cross sections scaling universally as dσ/dΩ ∝ 1/s at ultra-Planckian energies across multiple channels.