Effective Field Theories in R_xi gauges

Abstract

In effective quantum field theories, higher dimensional operators can affect the canonical normalization of kinetic terms at tree level. These contributions for scalars and gauge bosons should be carefully included in the gauge fixing procedure, in order to end up with a convenient set of Feynman rules. We develop such a setup for the linear R_xi-gauges. It involves a suitable reduction of the operator basis, a generalized gauge fixing term, and a corresponding ghost sector. Our approach extends previous results for the dimension-six Standard Model Effective Field Theory to a generic class of effective theories with operators of arbitrary dimension.

arXiv comment16 pages, no figures

References in corpus (8)

• Dimension-Six Terms in the Standard Model Lagrangian
• Measurement of the fine-structure constant as a test of the Standard Model
• Reduced Effective Lagrangians
• Feynman Rules for the Standard Model Effective Field Theory in $R_{\xi }$-gauges
• Electroweak effective lagrangians
• Effective Lagrangians with Higher Order Derivatives
• Equations of Motion for Effective Lagrangians and Penguins in Rare B-Decays
• Gauge fixing the Standard Model Effective Field Theory

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