Work

Initial-final and initial-initial antenna functions for real radiation at next-to-leading order

Year: 2023

Type: article

Abstract: The antenna subtraction method has achieved remarkable success in various processes relevant to the Large Hadron Collider. In Reference [1], an algorithm was proposed for constructing real-radiation antenna functions for electron-positron annihilation, directly from specified unresolved limits, accommodating any number of real emissions. Here, we extend this algorithm to build antennae involving partons in the initial state, specifically the initial-final and initial-initial antennae. Using this extended algorithm, we explicitly construct all NLO QCD antenna functions and compare them with previously extracted antenna functions derived from matrix elements. Additionally, we rigorously match the integration of the antenna functions over the initial-final and initial-initial unresolved phase space with the previous approach, providing an independent validation of our results. The improved antenna functions are more compact and reduced in number, making them more readily applicable for higher-order calculations.

Source: Journal of High Energy Physics

DOI: 10.1007/jhep12(2023)171

Authors: Elliot Fox, Nigel Glover

Institutions: Durham University, University of Zurich

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: National Science Foundation, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Universität Zürich, Science and Technology Facilities Council

Awards: G2299243686, Proposal for IPPP (UK National Phenomenology Institute), 2020-2023, Computing flavour-sensitive observables at high energy colliders, G993971353