Renormalization of chiral two-pion exchange NN interactions with {delta} excitations: Central phases and the deuteron

Journal Article · Wed Apr 15 04:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.044001· OSTI ID:21286860

Valderrama, M Pavon ^[1]; Arriola, E Ruiz ^[2]

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1. Institut fuer Kernphysik and Juelich Center for Hadron Physics, Forschungszentrum Juelich, D-52425 Juelich (Germany)
2. Departamento de Fisica Atomica, Molecular y Nuclear, Universidad de Granada, E-18071 Granada (Spain)

The renormalization of the chiral np interaction with {delta} excitations in intermediate states is considered at next-to-leading order and next-to-next-to-leading order for central waves. The inclusion of the {delta} excitation as an explicit degree of freedom improves the convergence properties of the effective field theory results for np scattering with respect to {delta}-less theory and allows the existence of a deuteron bound state in the infinite cutoff limit. The {sup 1}S{sub 0} singlet and {sup 3}S{sub 1} triplet phase shifts reproduce data for p{approx}m{sub {pi}}. The role of spectral function regularization is also discussed.

• OSTI ID: 21286860
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 79; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BOUND STATE
CHIRALITY
CONVERGENCE
DEGREES OF FREEDOM
DEUTERONS
EXCITATION
FIELD THEORIES
INTERMEDIATE STATE
NUCLEON-NUCLEON INTERACTIONS
PHASE SHIFT
PIONS
PROTON-NEUTRON INTERACTIONS
RENORMALIZATION
SCATTERING
SPECTRAL FUNCTIONS
TRIPLETS