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Perturbative renormalizability of chiral two pion exchange in nucleon-nucleon scattering

We study the perturbative renormalizability of chiral two pion exchange for the singlet and triplet channels within effective field theory, provided that the one pion exchange piece of the interaction has been fully iterated. We determine the number of counterterms/subtractions needed in order to obtain finite results when the cut-off is removed, resulting in three counterterms for the singlet channel and six for the triplet. The results show that chiral two pion exchange can be treated perturbatively up to a center-of-mass momentum of k ~ 200-300 MeV in the singlet channel and k ~ 300-400 in the triplet.

preprint2011arXivOpen access
M. Pavon Valderrama
nucl-th
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M. Pavon Valderrama

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