Worldsheet computation of heavy-light correlators

• DOI: 10.1007/jhep03(2023)066
• Publication Date: 2023-03-11T04:35:08Z
• Authors: Davide Bufalini; Sergio Iguri; Nicolas Kovensky; David Turton
• Keywords: High Energy Physics - Theory; family; n-point function; QC770-798; AdS-CFT Correspondence; 01 natural sciences; General Relativity and Quantum Cosmology; membrane model; decoupling; conformal; charge; https://purl.org/becyt/ford/1.3; black hole; String (physics); Worldsheet; String theory; correlation function; string model; High-Energy Collider; Quantum electrodynamics; [PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th]; BLACK HOLES IN STRING THEORY; Physics; Particle physics; Conformal Field Models in String Theory; Mathematical physics; twist; Physical Sciences; [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc]; duality; Theoretical physics; CONFORMAL FIELD MODELS IN STRING THEORY; Non-critical string theory; Nuclear and High Energy Physics; 5; FOS: Physical sciences; General Relativity and Quantum Cosmology (gr-qc); field theory; 530; Quantum mechanics; Nuclear and particle physics. Atomic energy. Radioactivity; Black Holes in String Theory; 0103 physical sciences; anti-de Sitter; vertex; Cosmological Parameters and Dark Energy; Particle Physics and High-Energy Collider Experiments; https://purl.org/becyt/ford/1; background; fluctuation; Astronomy and Astrophysics; ADS-CFT CORRESPONDENCE; Holographic Derivation of Field Theories and Gravity; radiation; chiral; Orbifold; Physics and Astronomy; High Energy Physics - Theory (hep-th); Hawking; Wess-Zumino-Witten model; string; operator; microstate; orbifold; holography; coset space

Abstract We compute a large collection of string worldsheet correlators describing light probes interacting with heavy black hole microstates. The heavy states consist of NS5 branes carrying momentum and/or fundamental string charge. In the fivebrane decoupling limit, worldsheet string theory on a family of such backgrounds is given by exactly solvable null-gauged WZW models. We construct physical vertex operators in these cosets, including all massless fluctuations. We compute a large class of novel heavy-light-light-heavy correlators in the AdS3 limit, where the light operators include those dual to chiral primaries of the holographically dual CFT. We compare a subset of these correlators to the holographic CFT at the symmetric product orbifold point, and find precise agreement in all cases, including for light operators in twisted sectors of the orbifold CFT. The agreement is highly non-trivial, and includes amplitudes that describe the analogue of Hawking radiation for these microstates. We further derive a formula for worldsheet correlators consisting of n light insertions on these backgrounds, and discuss which subset of these correlators are likely to be protected. As a test, we compute a heavy-light five-point function, obtaining precisely the same result both from the worldsheet and the symmetric orbifold CFT. This paper is a companion to and extension of [1].