Infrared subtleties and chiral vertices at NLO: an implicit regularization analysis

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URI: https://hdl.handle.net/10481/85607
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Author
Rosado, Ricardo J. C.; Cherchiglia, Adriano; Sampaio, Marcos; Hiller, Brigitte
Editorial
Springer Nature
Date
2023-09-28
Referencia bibliográfica
Rosado, R.J.C., Cherchiglia, A., Sampaio, M. et al. Infrared subtleties and chiral vertices at NLO: an implicit regularization analysis. Eur. Phys. J. C 83, 879 (2023). [https://doi.org/10.1140/epjc/s10052-023-12052-2]
Sponsorship
Fundação para a Ciência eTecnologia (FCT); ProjectsCERN/FIS-PAR/0040 /2019, CERN /FIS-COM /0035 /2019; UID /FIS /04564 /2020; The grant FCT 2020.07172.BD; National Council for Scientific and Technological Development; Projects 166523/2020-8; 201013/2022-3; 302790/2020-9
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 -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 matrix without requiring symmetry preserving counterterms while the amplitude is infrared finite as stated by the KLN theorem
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Atribución 4.0 Internacional
Except where otherwise noted, this item's license is described as Atribución 4.0 Internacional