Improving the convergence of the chiral expansion for nuclear forces I: Peripheral phases

Details Improving the convergence of the chiral expansion for nuclear forces I: Peripheral phases Improving the convergence of the chiral expansion for nuclear forces I: Peripheral phases

2003-04-14

arxiv.org/abs/nucl-th/0304037v2

Eur.Phys.J. A19 (2004) 125-137

Physics

Nuclear Physics

Nuclear Theory

19 pp, 6 figs, enlarged version

Scientific paper

10.1140/epja/i2003-10096-0

We study the two-pion exchange potential at next-to-next-to-leading order in chiral effective field theory. We propose a new cut-off scheme for the pion loop integrals based on spectral function regularization. We show that this method allows for a consistent implementation of constraints from pion-nucleon scattering. It leads to a much improved description of the partial waves with angular momentum l \geq 2 as compared to the calculation utilizing dimensional regularization.

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