The component-count conjecture for the lifted scattering correspondence

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Let C~(3,n,1)\widetilde{\rm C}(3,n,1) be the lifted scattering correspondence over the spinor-helicity variety X(3,n)X(3,n), and let C(3,n,1){\rm C}(3,n,1) be the corresponding scattering correspondence. The lifted correspondence comes with a map to X(3,n)X(3,n), and the involution referred to in the source acts on its birational components.

Component-count conjecture. The lifted scattering correspondence C~(3,n,1)\widetilde{\rm C}(3,n,1) decomposes into five irreducible components, with exactly one component whose map onto X(3,n)X(3,n) is not birational. Consequently, the scattering correspondence C(3,n,1){\rm C}(3,n,1) has three irreducible components, and the four birational components of the lifted correspondence become two components modulo the involution.

This predicts the irreducible-component structure of the scattering correspondence and distinguishes the unique non-birational component from the birational ones. The supplied text gives no evidence that the conjecture has been proved or disproved.

References

Primary source

Yassine El Maazouz, Anaëlle Pfister and Bernd Sturmfels, “Spinor-Helicity Varieties”, arXiv:2406.17331 (2025).

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