Dual degenerate insertion moment and beta-factorization conjecture

Let γ(0,2)\gamma\in(0,2), let X(eiθ)X(e^{i\theta}) be the log-correlated Gaussian field appearing in the circular Liouville conformal field theory setting, and let YγY_\gamma be the Fyodorov–Bouchaud random variable. Define

Mγdual=12π02π1eiθ2eγ2X(eiθ)dθ.M_{\gamma}^{\mathrm{dual}}=\frac{1}{2\pi}\int_0^{2\pi}|1-e^{i\theta}|^2e^{\frac{\gamma}{2}X(e^{i\theta})}\,d\theta.

Dual degenerate insertion conjecture. For every real p<4γ2p<\frac{4}{\gamma^2},

E[(Mγdual)p]=Γ(1pγ24)Γ(1+8γ2)Γ(1+4γ2p)Γ(1γ24)pΓ(1+4γ2)Γ(1+8γ2p),\mathbb{E}[(M_{\gamma}^{\mathrm{dual}})^p]=\frac{\Gamma(1-p\frac{\gamma^2}{4})\Gamma(1+\frac{8}{\gamma^2})\Gamma(1+\frac{4}{\gamma^2}-p)}{\Gamma(1-\frac{\gamma^2}{4})^p\Gamma(1+\frac{4}{\gamma^2})\Gamma(1+\frac{8}{\gamma^2}-p)},

and, equivalently,

Mγdual=lawYγX21,M_{\gamma}^{\mathrm{dual}}\overset{law}{=}Y_\gamma X_2^{-1},

where YγY_\gamma and X2X_2 are independent and X2B(1+4γ2,4γ2)X_2\sim\mathcal{B}(1+\frac{4}{\gamma^2},\frac{4}{\gamma^2}). The source presents this as an expected analogous formula for the dual degenerate insertion; it does not provide evidence of resolution.

Sources & referencesView supporting material

Primary source

Guillaume Remy, “The Fyodorov-Bouchaud formula and Liouville conformal field theory”, arXiv:1710.06897 (2019).

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