The two-nucleon system at next-to-next-to-next-to-leading order
We consider the two-nucleon system at next-to-next-to-next-to-leading order (N{sup 3}LO) in chiral effective field theory. The two--nucleon potential at N{sup 3}LO consists of one-, two- and three-pion exchanges and a set of contact interactions with zero, two and four derivatives. In addition, one has to take into account various isospin--breaking and relativistic corrections. We employ spectral function regularization for the multi--pion exchanges. Within this framework, it is shown that the three-pion exchange contribution is negligibly small. The low--energy constants (LECs) related to pion-nucleon vertices are taken consistently from studies of pion-nucleon scattering in chiral perturbation theory. The total of 26 four--nucleon LECs has been determined by a combined fit to some np and pp phase shifts from the Nijmegen analysis together with the nn scattering length.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 835786
- Report Number(s):
- JLAB-THY-04-228; DOE/ER/40150-3042
- Journal Information:
- Nuclear Physics A, Journal Name: Nuclear Physics A Journal Issue: 2-4 Vol. 747
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effective Field Theory and Isospin Violation in Few-Nucleon Systems
Low-energy constants and relativity in peripheral nucleon-nucleon scattering