Enhancement of deltaful two-pion exchange nuclear forces

Autor:	Chen, Haiming, Peng, Rui, Lyu, Songlin, Long, Bingwei
Rok vydání:	2024
Předmět:	Nuclear Theory
Zdroj:	Communications in Theoretical Physics, Volume 76, Number 9 (2024)
Druh dokumentu:	Working Paper
DOI:	10.1088/1572-9494/ad5716
Popis:	The role of the delta isobar degrees of freedom in nucleon-nucleon scattering is revisited. We attempt to understand why the dimensionally regularized two-pion exchanges with the explicit delta isobar is much stronger than the ones with spectral function regularization. When the cutoff value of spectral function regularization is varied, the isoscalar central component exhibits a rather large cutoff variation. This reveals a surprisingly large numerical factor of the deltaful two-pion exchange potentials. The power counting is adjusted accordingly and we discuss the results and how to improve upon this finding. Comment: 16 pages, 6 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2407.17069 Zobrazit plný text záznamu View this record from Arxiv