EPJ Web of Conferences 3, 05019 (2010)
https://doi.org/10.1051/epjconf/20100305019

Renormalization of Proton-Proton Scattering and Proton-Proton Fusion with Chiral Two Pion Exchange: Regulator Independent Results.

Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, DE-52424 Jülich ( Germany )

^a e-mail: m.pavon.valderrama@fz-juelich.de

Abstract

The renormalization of the s-wave proton-proton scattering amplitude with chiral two-pion exchange is considered up to next-to-next-to-leading order in the chiral expansion. The resulting phase shifts accurately describe the s-wave phases up to k_cm ≃ 200 MeV. The effect and possible improvements coming from finite cut-offs or spectral function regularization are considered. Proton-proton fusion is calculated with the resulting renormalized wave functions in a regulator independent way at next-to-next-to-leading order (N²LO).