Naive Dimensional Analysis and Irrelevant Operators

TL;DR

This paper provides simple guidelines for estimating the coefficients of operators in effective Lagrangians, focusing on the contributions from irrelevant operators in the underlying theory.

Contribution

It introduces straightforward rules for estimating operator coefficients, especially those from irrelevant interactions, enhancing practical calculations in effective field theories.

Findings

Derived easy-to-follow estimation rules for operator coefficients.

Clarified the role of irrelevant operators in effective Lagrangians.

Provided practical tools for effective field theory analysis.

Abstract

We derive a set of easy rules to follow when estimating the coefficients of operators in an effective Lagrangian. In particular, we emphasize how to estimate the size of coefficients originating from irrelevant interactions in the underlying Lagrangian.