An alternative scheme for effective range corrections in pionless EFT
High Energy Physics - Phenomenology
2022-01-05 v1 High Energy Physics - Lattice
Nuclear Theory
Abstract
We discuss an alternative scheme for including effective range corrections in pionless effective field theory. The standard approach treats range terms as perturbative insertions in the T -matrix. In a finite volume this scheme can lead to singular behavior close to the unperturbed energies. We consider an alternative scheme that resums the effective range but expands the spurious pole of the T -matrix created by this resummation. We test this alternative expansion for several model potentials and observe good convergence.
Keywords
Cite
@article{arxiv.2109.11982,
title = {An alternative scheme for effective range corrections in pionless EFT},
author = {M. Ebert and H. -W. Hammer and A. Rusetsky},
journal= {arXiv preprint arXiv:2109.11982},
year = {2022}
}