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Classical Double Copy of Worldline Quantum Field Theory

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arxiv 2109.10345 v1 pith:GT5NZUUH submitted 2021-09-21 hep-th gr-qc

classification hep-thgr-qc
keywords copydoubletheoryclassicalfieldquantumrelationscattering
verification ladder T0 review T1 audit T2 compute T3 formal

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The recently developed worldline quantum field theory (WQFT) formalism for the classical gravitational scattering of massive bodies is extended to massive, charged point particles coupling to bi-adjoint scalar field theory, Yang-Mills theory, and dilaton-gravity. We establish a classical double copy relation in these WQFTs for classical observables (deflection, radiation). The bi-adjoint scalar field theory fixes the locality structure of the double copy from Yang-Mills to dilaton-gravity. Using this the eikonal scattering phase (or free energy of the WQFT) is computed to next-to-leading order (NLO) in coupling constants using the double copy as well as directly finding full agreement. We clarify the relation of our approach to previous studies in the effective field theory formalism. Finally, the equivalence of the WQFT double copy to the double copy relation of the classical limit of quantum scattering amplitudes is shown explicitly up to NLO.

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Cited by 11 Pith papers

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

  1. Spinning the Probe in Kerr with WQFT

    hep-th 2025-06 conditional novelty 8.0 of 10

    Using worldline quantum field theory, the authors derive the impulse and spin kick for a spinning probe scattering in Kerr spacetime through seventh physical post-Minkowskian order.

  2. Conservative Black Hole Scattering at Fifth Post-Minkowskian and Second Self-Force Order

    hep-th 2026-01 conditional novelty 7.0 of 10

    The conservative black-hole scattering angle at fifth post-Minkowskian and second self-force order is computed in terms of K3 periods, but contains a coefficient fixed only by an ad hoc 'γ-3' prescription.

  3. Entire Four-Graviton EFT from the Duality Between Color and Kinematics

    hep-th 2026-01 conditional novelty 7.0 of 10

    Every parity-even four-graviton amplitude in any spacetime dimension can be constructed from gauge-theory building blocks via double or triple color-kinematics copies, with the D>6 Lovelock R^3 term as the unique trip...

  4. Generalized Unitarity Method for Worldline Field Theory

    hep-th 2025-10 conditional novelty 7.0 of 10

    Worldline gravitational observables can be bootstrapped from locality, unitarity, gauge invariance, and a soft theorem once worldline energies are complexified, reproducing the known O(G^5/2) waveform and O(G^3) on-sh...

  5. Gleaning gravitational amplitudes -- a double copy for canceling dilatons

    hep-th 2025-01 conditional novelty 7.0 of 10

    An asymmetric double copy with a ghost-like sqrt-dilaton cancels dilaton contaminations in tree-level GR amplitudes with massive scalars up to six points, leaving a residual bubble ambiguity at one loop.

  6. Spinning bodies in general relativity from bosonic worldline oscillators

    hep-th 2024-11 conditional novelty 7.0 of 10

    A bosonic-oscillator worldline action for spinning compact bodies in general relativity is constructed, and it reproduces known post-Minkowskian scattering results while remaining valid to all orders in spin.

  7. Gluon amplitudes in first quantization

    hep-th 2025-08 unverdicted novelty 6.0 of 10

    A bosonic spinning particle model with BRST-extracted vertex operators yields tree-level gluon amplitudes as worldline correlators.

  8. Inconsistency of point-particle dynamics on higher-spin backgrounds: massive particles

    hep-th 2025-06 conditional novelty 6.0 of 10

    Massive scalar particles cannot have local interactions with chiral higher-spin backgrounds, so no higher-spin extension of Riemannian geometry of this type exists.

  9. HEFT Numerators from Kinematic Algebra

    hep-th 2025-01 conditional novelty 6.0 of 10

    The heavy-mass effective field theory kinematic numerators are derived as the field theory limit of nested commutators of string vertex operators, reproducing and extending earlier fusion-rule results.

  10. Gravitational lensing in a plasma from worldlines

    hep-th 2024-12 conditional novelty 6.0 of 10

    The worldline formalism yields a closed-form NLO plasma-induced deflection angle for power-law electron density, matching previous results where they exist.

  11. Classical Black Hole Scattering to Celestial Amplitudes in Effective Theories of Gravity

    hep-th 2026-08 conditional novelty 3.0 of 10

    A doctoral thesis reproduces the author's published post-Newtonian and post-Minkowskian two-body observables and celestial amplitudes in scalar-tensor, Chern-Simons, Einstein-Maxwell-dilaton, and quadratic gravity.

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