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Monopoles Entangle Fermions

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arxiv 2109.01145 v1 pith:6J3C4JQG submitted 2021-09-02 hep-th hep-ph

Monopoles Entangle Fermions

classification hep-th hep-ph
keywords finalstateangularcallangaugemomentumonlyamplitudes
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We resolve the decades old mystery of what happens when a positron scatters off a minimal GUT monopole in an s-wave, first discussed by Callan in 1983. Using the language of on-shell amplitudes and pairwise helicity we show that the final state contains two up quarks and a down quark entangled with angular momentum stored in the gauge fields, which is the only particle final state that satisfies angular momentum and gauge charge conservation. The cross section for this process is as large as in the original Rubakov-Callan effect, only suppressed by the QCD scale. The final state we find cannot be seen in Callan's truncated 2D theory, since our entanglement requires more than 2 dimensions.

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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. Cosmological History of Flavour Deconstruction Models: Constraints from Monopole Production

    hep-ph 2026-05 unverdicted novelty 5.0

    Flavour deconstruction models with semi-simple gauge groups generically produce light monopoles that require low-scale reheating after inflation to satisfy cosmological and astrophysical bounds.

  2. Comments on Symmetry Operators, Asymptotic Charges and Soft Theorems

    hep-th 2026-04 unverdicted novelty 5.0

    1-form symmetries in the QED soft sector generate asymptotic charges whose central extension implies soft photon theorems and fixes a two-soft-photon contact term.