Multiloop amplitudes of light-cone gauge superstring field theory: odd spin structure contributions

• Published in: The journal of high energy physics Vol. 2018; no. 3; pp. 1 - 28
• Main Authors: Ishibashi, Nobuyuki, Murakami, Koichi
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.03.2018; Springer Nature B.V; SpringerOpen
• Subjects: Amplitudes; BRST Quantization; Classical and Quantum Gravitation; Conformal Field Models in String Theory; Elementary Particles; Field theory; High energy physics; Physics; Physics and Astronomy; Pictures; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Regular Article - Theoretical Physics; Relativity Theory; Spin structure; String Field Theory; String Theory; Superstrings and Heterotic Strings; BRST Quantization; String Field Theory; Superstrings and Heterotic Strings; Conformal Field Models in String Theory
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP03(2018)063

A bstract We study the odd spin structure contributions to the multiloop amplitudes of light-cone gauge superstring field theory. We show that they coincide with the amplitudes in the conformal gauge with two of the vertex operators chosen to be in the pictures different from the standard choice, namely (−1, −1) picture in the type II case and −1 picture in the heterotic case. We also show that the contact term divergences can be regularized in the same way as in the amplitudes for the even structures and we get the amplitudes which coincide with those obtained from the first-quantized approach.