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Chiral theory of nucleons and pions in the presence of an external gravitational field

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arxiv 2006.05890 v1 pith:4LSNDKLZ submitted 2020-06-10 hep-ph hep-latnucl-th

Chiral theory of nucleons and pions in the presence of an external gravitational field

classification hep-ph hep-latnucl-th
keywords chiralgravitationalexternalfieldordercorrectionsfactorsform
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We extend the standard second order effective chiral Lagrangian of pions and nucleons by considering the coupling to an external gravitational field. As an application we calculate one-loop corrections to the one-nucleon matrix element of the energy-momentum tensor to fourth order in chiral counting, and next-to-leading order tree-level amplitude of the pion-production in an external gravitational field. We discuss the relation of the obtained results to experimentally measurable observables. Our expressions for the chiral corrections to the nucleon gravitational form factors differ from those in the literature. That might require to revisit the chiral extrapolation of the lattice data on the nucleon gravitational form factors obtained in the past.

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Cited by 2 Pith papers

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

  1. Gluon Gravitational $ D$-Form Factor: The $\sigma$-Meson as a Dilaton Confronted with Lattice Data II

    hep-ph 2025-12 unverdicted novelty 5.0

    Lattice fits to gluon gravitational form factors support the sigma meson as dilaton with new predictions for rho and delta, reinforcing evidence for scale symmetry in low-energy QCD.

  2. Particle seismology: mechanical and gravitational properties from parton-hadron duality

    hep-ph 2026-04 unverdicted novelty 2.0

    A hadronic approach based on dispersion relations and meson dominance achieves a successful description of lattice QCD data for gravitational form factors of pions and nucleons.