2017/01/23 by Simeon Hellerman, Hellerman, Simeon, Shunsuke Maeda +1
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Theory (hep-th) #Particle physics theoretical and experimental studies #advanced mathematical theories
paper · pdf · doi:10.48550/arxiv.1701.06406
openalex publication_date 2017/01/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this note we construct vertex operators in effective string theory using the simplified covariant formalism, i.e. by embedding it in the Polyakov formalism supplemented by an anomaly term, and fixing to conformal gauge. These vertex operators represent off-shell background fields rather than dynamical string states. We construct vertex operators for nontrivial scalar, electromagnetic, and gravitational backgrounds. As an application, we compute a scalar form factor of a long string with length R, where the Fourier momentum q of the external scalar field satisfies q2 ≪ 1/α^′, and we find the expected logarithmic dependence on the size of the string.