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arXiv · 2603.23818

Regge spectral generator and form factors from hard exclusive amplitudes in holographic QCD

Guy F. de Teramond·Stanley J. Brodsky·Hans Gunter Dosch
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Abstract

We show that the infinite tower of hard exclusive amplitudes in holographic light-front QCD leads to a spectral generator $G(\alpha,\lambda)$ which encodes the full Regge spectrum. The construction assumes a Poisson distribution of Fock-state components, where $\lambda$ represents the average parton multiplicity above the valence configuration. The resulting generator yields a Regge spectrum invariant under continuous $\lambda$-deformations. Its even- and odd-twist projections yield the meson and baryon form factors with a single value of $\lambda$, fixed by the pion charge radius, which in turn determines the full $Q^2$ dependence. The constituent counting rules for both sectors follow from the structure of the spectral generator, which also provides a compact analytic representation of parton distributions.

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Guy F. de Teramond, Stanley J. Brodsky, Hans Gunter Dosch. 2026-03-25. Regge spectral generator and form factors from hard exclusive amplitudes in holographic QCD. https://doi.org/10.1103/55pw-29c6

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