Four-nucleon force using the method of unitary transformation

TL;DR

This paper derives the leading four-nucleon force within chiral effective field theory using a unitary transformation approach, providing a parameter-free formulation applicable to few- and many-nucleon systems.

Contribution

It presents a detailed derivation of the four-nucleon force using the unitary transformation method, resulting in a parameter-free expression in both momentum and configuration space.

Findings

Derived the leading four-nucleon force in chiral EFT

Provided the force in both momentum and configuration space

Force contains no unknown parameters

Abstract

We discuss in detail the derivation of the leading four-nucleon force in chiral effective field theory using the method of unitary transformation. The resulting four-nucleon force is given in both momentum and configuration space. It does not contain any unknown parameters and can be used in few- and many-nucleon studies.