Decoupling in the Similarity Renormalization Group for Nucleon-Nucleon Forces

TL;DR

This paper investigates how the Similarity Renormalization Group (SRG) method effectively separates low-energy nuclear physics from high-energy details, demonstrating universal decoupling and small errors in two-body and few-body systems.

Contribution

It provides a detailed analysis of decoupling in SRG for nucleon-nucleon forces, highlighting its universality and perturbative error estimates.

Findings

Decoupling in SRG is universal across different interactions.

Errors from high-momentum suppression are perturbatively small.

Low-energy observables are effectively isolated from high-energy details.

Abstract

Decoupling via the Similarity Renormalization Group (SRG) of low-energy nuclear physics from high-energy details of the nucleon-nucleon interaction is examined for two-body observables and few-body binding energies. The universal nature of this decoupling is illustrated and errors from suppressing high-momentum modes above the decoupling scale are shown to be perturbatively small.