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arXiv · 2201.00840

One-Loop Matching Conditions in Neutrino Effective Theory

Tommy Ohlsson·Marcus Pernow
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Abstract

We investigate matching conditions and threshold corrections between full and effective theories based on the type I seesaw mechanism. In general, using an intuitive Feynman diagrammatical approach, we compute the amplitudes before and after integrating out heavy right-handed neutrinos at the matching scale. In particular, we derive the one-loop matching conditions between the full and the effective theories. The matching conditions of the parameters are influenced by one-loop corrections to the corresponding vertices as well as wave function corrections for the Higgs and the lepton fields. Our results are comparable to earlier results based on a functional approach.

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Tommy Ohlsson, Marcus Pernow. 2022-01-03. One-Loop Matching Conditions in Neutrino Effective Theory. https://doi.org/10.1016/j.nuclphysb.2022.115729

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