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February 5, 2026Journal of High Energy PhysicsOpen Access

Reflection positivity in a higher-derivative model with physical bound states of ghosts

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Authors

MAM. AsoreyGKG. KreinMPMiguel Pardina

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Overview

This analysis demonstrates unitarity and reflection positivity in higher-derivative quantum gravity models with ghost fields, suggesting new insights for physical observables.

Key Points

  • The study aims to explore the conditions under which higher-derivative theories of quantum gravity can remain consistent and unitary.
  • Examined reflection positivity in a six-derivative scalar field action
  • Analyzed the existence of a Källén-Lehmann spectral representation
  • Demonstrated the emergence of ghost dynamics leading to physical observables
  • Conditions for reflection positivity and spectral representation were satisfied
  • Confirmed that ghost fields can form a bound state
  • Supported the interpretation of observables emerging from ghost dynamics within a consistent framework

Cite This Study

Asorey et al. (2026) studied this question.

synapsesocial.com/papers/698435d5f1d9ada3c1fb51fahttps://doi.org/10.1007/jhep02(2026)020
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