Two-point tree-level string amplitudes as AdS transition amplitudes
Year: 2025
Type: article
Abstract: We compute the two-point open string and closed string amplitudes at tree level and show that, in a't Hooft-like limit, they take a form structurally analogous to boundary-to-boundary transition amplitudes of a scalar field in Euclidean AdS space. Interestingly, while both amplitudes yield equivalent expressions, the associated't Hooft couplings are defined by different worldsheet curvatures—geodesic for the disk and Gaussian for the sphere—suggesting a possible geometric aspect of open/closed string duality.
Source: Physics Letters B
Institutions: Naresuan University, Nagoya University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4412459409