Zobrazeno 1 - 10
of 455
pro vyhledávání: '"Alday, Luis"'
Autor:
Alday, Luis F., Zhou, Xinan
We study AdS form factors, given by the Mellin representation for CFT correlators of local operators in the presence of extended defects. We propose a formula for taking (and expanding around) the flat-space limit. This formula relates the flat-space
Externí odkaz:
http://arxiv.org/abs/2411.04378
We compute the AdS Virasoro-Shapiro amplitude in the Regge limit, in terms of the CFT data of the exchanged operators in the leading Regge trajectory. To any order in the small curvature expansion, the result can be written in terms of derivatives of
Externí odkaz:
http://arxiv.org/abs/2409.03695
Carrollian amplitudes are flat space amplitudes written in position space at null infinity which can be re-interpreted as correlators in a putative dual Carrollian CFT. We argue that these amplitudes are the natural objects obtained in the flat space
Externí odkaz:
http://arxiv.org/abs/2406.19343
Autor:
Alday, Luis F., Hansen, Tobias
We consider the Veneziano amplitude for the scattering of gluons in type IIB string theory on $AdS_5 \times S^5/\mathbb{Z}_2$ in the presence of D7 branes. On general grounds curvature corrections around flat space can be thought of as arising from t
Externí odkaz:
http://arxiv.org/abs/2404.16084
We compute the AdS Veneziano amplitude for type IIB gluon scattering in $AdS_5 \times S^3$ to all orders in $\alpha'$ in a small curvature expansion. This is achieved by combining a dispersion relation in the dual $4d$ $\mathcal{N}=2$ SCFT with an an
Externí odkaz:
http://arxiv.org/abs/2403.13877
Publikováno v:
JHEP 02 (2024) 089
We study the AdS Virasoro-Shapiro amplitude in the limit of fixed-angle high energy scattering. A recent representation as a world-sheet integral allows to compute the amplitude in this regime by saddle point techniques, very much as in flat space. T
Externí odkaz:
http://arxiv.org/abs/2312.02261
Integrated correlation functions in $\mathcal{N}=4$ supersymmetric Yang--Mills theory with gauge group $SU(N)$ can be expressed in terms of the localised $S^4$ partition function, $Z_N$, deformed by a mass $m$. Two such cases are $\mathcal{C}_N=(\tex
Externí odkaz:
http://arxiv.org/abs/2310.12322
We present a powerful new approach to compute tree-level higher-point holographic correlators. Our method only exploits the flat-space limit, where we point out a novel and important simplification, and factorization of amplitudes in AdS. In particul
Externí odkaz:
http://arxiv.org/abs/2307.06884
Autor:
Alday, Luis F., Hansen, Tobias
Publikováno v:
JHEP 10 (2023) 023
We present a constructive method to compute the AdS Virasoro-Shapiro amplitude, order by order in AdS curvature corrections. At kth order the answer takes the form of a genus zero world-sheet integral involving weight 3k single-valued multiple polylo
Externí odkaz:
http://arxiv.org/abs/2306.12786
We construct a representation for the first AdS curvature correction to the Virasoro-Shapiro amplitude, as an integral over the Riemann sphere. The integrand is that of the Virasoro-Shapiro amplitude in flat space, with the extra insertion of a linea
Externí odkaz:
http://arxiv.org/abs/2305.03593