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Monopoles Entangle Fermions
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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.
Forward citations
Cited by 3 Pith papers
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Dark Matter and Baryon Asymmetry from Monopole-Axion Interactions
A rotating QCD axion dissipates kinetic energy via dark monopole dyon transitions, explaining dark matter and baryon asymmetry with a predicted axion decay constant below 10^9 GeV.
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Monopole Catalyzed Baryogenesis with a $\theta$ angle
Claims that Callan-Rubakov monopole catalysis biased by a tiny theta-term can generate the observed baryon asymmetry at T~100 GeV with monopole densities below current bounds.
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Electromagnetic Scoot for Dyons Revisited
Dyon (or electric-magnetic) scattering retains a 1PM angular-momentum scoot on both constant-time and hyperboloidal slices, balanced by fields, while the mass-moment scoot vanishes on hyperboloids as in the pure-elect...
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