Subleading Soft Factor for String Disk Amplitudes

Abstract

We investigate the behavior of superstring disk scattering amplitudes in the presence of a soft external momentum at finite string tension. We prove that there are no ${\alpha }^{\prime }$-corrections to the field theory form of the subleading soft factor $S^{(1)}$. At the end of this work, we also comment on the possibility to find the corresponding subleading soft factors in closed string theory using our result and the KLT relations.

15 pages, v2: minor changes, new references, version accepted by JHEP

References in corpus (13)

• Minimal Basis for Gauge Theory Amplitudes
• The Momentum Kernel of Gauge and Gravity Theories
• Evidence for a New Soft Graviton Theorem
• On Loop Corrections to Subleading Soft Behavior of Gluons and Gravitons
• Loop Corrections to Soft Theorems in Gauge Theories and Gravity
• Soft sub-leading divergences in Yang-Mills amplitudes
• Subleading soft theorem in arbitrary dimension from scattering equations
• Soft Graviton Theorem in Arbitrary Dimensions
• Scattering Equations and String Theory Amplitudes
• Are Soft Theorems Renormalized?
• Conformal Invariance of the Subleading Soft Theorem in Gauge Theory
• Complete N-Point Superstring Disk Amplitude II. Amplitude and Hypergeometric Function Structure
• Complete N-Point Superstring Disk Amplitude I. Pure Spinor Computation

Cited by in corpus (12)

• Low-Energy Behavior of Gluons and Gravitons from Gauge Invariance
• The method of regions and next-to-soft corrections in Drell-Yan production
• Constraining subleading soft gluon and graviton theorems
• Diagrammatic insights into next-to-soft corrections
• Next to subleading soft-graviton theorem in arbitrary dimensions
• Scattering Equations and String Theory Amplitudes
• Factorized soft graviton theorems at loop level
• Note on Soft Graviton theorem by KLT Relation
• Soft Theorems from Effective Field Theory
• Soft theorem for the graviton, dilaton and the Kalb-Ramond field in the bosonic string
• Soft Theorem of N=4 SYM in Grassmannian Formulation
• A Note on Soft Factors for Closed String Scattering