$\mathcal{N}=2$ Universality at Strong Coupling
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| Format: | Preprint |
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2025
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| author | De Lillo, L. Duan, Z. Frau, M. Galvagno, F. Lerda, A. Vallarino, P. Wen, C. |
| author_facet | De Lillo, L. Duan, Z. Frau, M. Galvagno, F. Lerda, A. Vallarino, P. Wen, C. |
| contents | We present a detailed analysis of integrated correlators for an $\mathcal{N}=2$ superconformal field theory on a squashed sphere with SU$(N)$ gauge group and fundamental/anti-symmetric matter. Employing the matrix model arising from supersymmetric localisation, we compute derivatives of the partition function $\mathcal{Z}$ with respect to the fundamental mass ($μ$), the anti-symmetric mass ($m$) and the squashing parameter ($b$), corresponding to integrated insertions of the $\mathcal{N}=2$ flavour-current and stress-tensor multiplets, which are holographically dual to gluon and graviton scatterings in the presence of D7-branes. For correlators dual to only graviton scatterings, we confirm the planar-limit equivalence with $\mathcal{N}=4$ SYM. Our main result is a remarkable universality for the mixed gluon-graviton scattering amplitudes off D7-branes, obtained from $\partial_μ^2 \partial_m^2 \log \mathcal{Z}$ and $\partial_μ^2 \partial_b^2 \log \mathcal{Z}$. We show that the leading and sub-leading large-$N$ contributions in the strong-coupling regime are governed by universal asymptotic series, identical to those found for integrated giant-graviton correlators in $\mathcal{N}=4$ SYM. We also propose an $\text{SL}(2, \mathbb{Z})$-invariant completion of these results in terms of non-holomorphic Eisenstein series. This completion provides exact constraints on higher-derivative terms in the dual $\text{AdS}_5$ brane-string amplitudes and highlights an unexpected universality across distinct superconformal theories at strong coupling. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2510_27594 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | $\mathcal{N}=2$ Universality at Strong Coupling De Lillo, L. Duan, Z. Frau, M. Galvagno, F. Lerda, A. Vallarino, P. Wen, C. High Energy Physics - Theory We present a detailed analysis of integrated correlators for an $\mathcal{N}=2$ superconformal field theory on a squashed sphere with SU$(N)$ gauge group and fundamental/anti-symmetric matter. Employing the matrix model arising from supersymmetric localisation, we compute derivatives of the partition function $\mathcal{Z}$ with respect to the fundamental mass ($μ$), the anti-symmetric mass ($m$) and the squashing parameter ($b$), corresponding to integrated insertions of the $\mathcal{N}=2$ flavour-current and stress-tensor multiplets, which are holographically dual to gluon and graviton scatterings in the presence of D7-branes. For correlators dual to only graviton scatterings, we confirm the planar-limit equivalence with $\mathcal{N}=4$ SYM. Our main result is a remarkable universality for the mixed gluon-graviton scattering amplitudes off D7-branes, obtained from $\partial_μ^2 \partial_m^2 \log \mathcal{Z}$ and $\partial_μ^2 \partial_b^2 \log \mathcal{Z}$. We show that the leading and sub-leading large-$N$ contributions in the strong-coupling regime are governed by universal asymptotic series, identical to those found for integrated giant-graviton correlators in $\mathcal{N}=4$ SYM. We also propose an $\text{SL}(2, \mathbb{Z})$-invariant completion of these results in terms of non-holomorphic Eisenstein series. This completion provides exact constraints on higher-derivative terms in the dual $\text{AdS}_5$ brane-string amplitudes and highlights an unexpected universality across distinct superconformal theories at strong coupling. |
| title | $\mathcal{N}=2$ Universality at Strong Coupling |
| topic | High Energy Physics - Theory |
| url | https://arxiv.org/abs/2510.27594 |