Three- and Four-point correlators of excited bosonic twist fields

Abstract

We compute three- and four-point correlation functions containing excited bosonic twist fields. Our results can be used to determine properties, such as lifetimes and production rates, of massive string excitations localised at D-brane intersections, which could be signatures of a low string scale even if the usual string resonances are inaccessible to the LHC.

42 pages, no figures

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• One-loop masses of Neumann-Dirichlet open strings and boundary-changing vertex operators
• ${\mathbb{Z}}_2$ boundary twist fields and the moduli space of D-branes
• Yukawa's of light stringy states
• String (gravi)photons, "dark brane photons", holography and the hypercharge portal
• Towards a fully stringy computation of Yukawa couplings on non factorized tori and non abelian twist correlators (I): the classical solution and action
• 2D Fermion on the Strip with Boundary Defects as a CFT with Excited Spin Fields