New approach to QCD final-state evolution in processes with massive partons

Assi, Benoît; Höche, Stefan

doi:10.1103/PhysRevD.109.114008

Title: New approach to QCD final-state evolution in processes with massive partons

Journal Article · 07 June 2024 · Physical Review. D.

DOI: https://doi.org/10.1103/PhysRevD.109.114008 · OSTI ID:2474284

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We present an algorithm for massive parton evolution which is based on the differentially accurate simulation of soft-gluon radiation by means of a nontrivial azimuthal angle dependence of the splitting functions. The kinematics mapping is chosen such as to reflect the symmetry of the final state in soft-gluon radiation and collinear splitting processes. We compute the counterterms needed for a fully differential next-to-leading order matching and discuss the analytic structure of the parton shower in the next-to-leading logarithmic limit. We implement the new algorithm in the numerical code Alaric and present a first comparison to experimental data. Published by the American Physical Society 2024

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 2474284

Report Number(s):: FERMILAB-PUB--23-336-T; MCNET-23-09; arXiv:2307.00728; 114008

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 11 Vol. 109; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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