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

Rosado, Ricardo J. C.; Cherchiglia, Adriano; Sampaio, Marcos; Hiller, Brigitte

doi:10.1140/epjc/s10052-023-12052-2

s10052-023-12052-2.pdf (533.3Kb)

Identificadores

URI: https://hdl.handle.net/10481/85607

DOI: 10.1140/epjc/s10052-023-12052-2

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Editorial

Springer Nature

Fecha

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]

Patrocinador

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

Resumen

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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