Renormalization of chiral two-pion exchange NN interactions with Delta-excitations: Central Phases and the Deuteron - Nuclear TheoryReportar como inadecuado




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Abstract: The renormalization of the chiral np interaction with Delta-excitations inintermediate states is considered at next-to-leading order NLO andnext-to-next-to-leading order N2LO for central waves.
The inclusion of theDelta-excitation as an explicit degree of freedom improves the convergenceproperties of the effective field theory results for np scattering with respectto Delta-less theory, and allows the existence of a deuteron bound state in theinfinite cut-off limit.
The 1S 0 singlet and 3S 1 triplet phase shiftsreproduce data for p ~ m pi.
The role of spectral function regularization isalso discussed.



Autor: M.
Pavon Valderrama, E.
Ruiz Arriola


Fuente: https://arxiv.org/



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