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https://hdl.handle.net/10316/111943
Title: | Infrared subtleties and chiral vertices at NLO: an implicit regularization analysis | Authors: | Rosado, Ricardo J. C. Cherchiglia, Adriano Sampaio, Marcos Hiller, Brigitte |
Issue Date: | 2023 | Publisher: | Springer Nature | Project: | We acknowledge support from Fundação para a Ciência eTecnologia (FCT) through the projectsCERN/FIS-PAR/0040 /2019, CERN /FIS-COM /0035 /2019, UID /FIS /04564 /2020, and the grant FCT 2020.07172.BD. A.C. acknowledges support from National Council for Scientific and Technological Development - CNPq through projects 166523/2020-8 and 201013/2022-3 and M. Sampaio acknowledges support from CNPq through grant 302790/2020-9. | Serial title, monograph or event: | European Physical Journal C | Volume: | 83 | Issue: | 9 | Abstract: | We employ implicit regularization (IReg) in quark-antiquark decays of the Z, or of a scalar (CP-even or odd) boson at NLO, and compare with dimensional schemes to reveal subtleties involving infrared divergence cancellation and γ5-matrix issues. Besides the absence of evanescent fields in IReg, such as -scalars required in certain schemes that operate partially in the physical dimension, we verify that our procedure preserves gauge invariance in the presence of the γ5 matrix without requiring symmetry preserving counterterms while the amplitude is infrared finite as stated by the KLN theorem. | URI: | https://hdl.handle.net/10316/111943 | ISSN: | 1434-6052 | DOI: | 10.1140/epjc/s10052-023-12052-2 | Rights: | openAccess |
Appears in Collections: | I&D CFis - Artigos em Revistas Internacionais |
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