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Ultra-Planckian scattering from a QFT for gravity

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arxiv 2107.01727 v2 pith:IFBCBQMK submitted 2021-07-04 hep-th

classification hep-th
keywords crossgravityscatteringsectionsquantumtheoryamplitudesanalog
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Astonishing cancellations take place in the calculation of high-energy scattering cross sections in quantum quadratic gravity, a quantum field theory for gravity. Tree-level differential cross sections that are minimally inclusive behave as $1/E^2$, as desired for a well-behaved UV completion. Such cross sections are calculated for the various spin states of the massless and massive graviparticles. These describe the hard scattering processes that occur in a picture involving the gravitational analog of parton showers. The structure of some of the simpler amplitudes is also explored. Unitarity without positivity is the key property of the perturbative theory.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Superselected ghost theory: real spectrum

    hep-th 2026-08 conditional novelty 6.0 of 10

    A ghost QFT with a real spectrum can be made probabilistic by enforcing exact ghost parity as a superselection rule, so physical states have definite norm sign.

  2. Remarks on ghost resonances

    hep-th 2025-01 conditional novelty 5.0 of 10

    For a ghost field above the multiparticle threshold, the dressed propagator carries a complex conjugate pole pair in the first Riemann sheet, and the paper derives spectral representations for both sheets while flaggi...

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