An anti-symmetric 'shift' response in the clustering of two galaxy populations carries a 1/K equivalence-principle-violation signal, and a fast quadratic estimator can extract it at the same projected sensitivity as the full bispectrum.
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Density reconstruction from biased tracers: Testing the equivalence principle through consistency relations
An anti-symmetric 'shift' response in the clustering of two galaxy populations carries a 1/K equivalence-principle-violation signal, and a fast quadratic estimator can extract it at the same projected sensitivity as the full bispectrum.