Work

Non-analytic terms of string amplitudes from partial waves

Year: 2024

Type: article

Abstract: A bstract We describe a general formalism based on the partial-wave decomposition to compute the iterative s -channel discontinuity of four-point amplitudes at any loop order. As an application, we focus on the low-energy expansions of type I and II superstring amplitudes. Besides providing new results for their leading and sub-leading logarithmic contributions beyond genus one, our approach elucidates the general structure of non-analytic threshold terms. In the case of open strings, the use of orthogonal colour projectors allows us to efficiently compute all contributions from different worldsheet topologies at a given loop order.

Source: Journal of High Energy Physics

DOI: 10.1007/jhep11(2024)117

Authors: Yu-tin Huang, Hynek Paul, Michele Santagata

Institutions: National Taiwan University, KU Leuven

Language: English

Topic: Black Holes and Theoretical Physics

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: Princeton University, Fonds Wetenschappelijk Onderzoek, Ministry of Science and Technology, Taiwan, National Science and Technology Council

Awards: Holography and Supersymmetric Localization, Further Studies in Amplitudes and Correlation Functions in Ads/Cft Correspondence( III )