The near threshold N N -> d pi reaction in chiral perturbation theory

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dc.creatorGardestig, A.
dc.creatorPhillips, D. R.
dc.creatorElster, Ch.
dc.date2005-11-16
dc.date2005-12-21
dc.date.accessioned2026-07-07T11:07:28Z
dc.date.available2026-07-07T11:07:28Z
dc.descriptionThe near-threshold n p -> d pi0 cross section is calculated in chiral perturbation theory to next-to-leading order in the expansion parameter sqrt{M m_pi}/Lambda_chi. At this order irreducible pion loops contribute to the relevant pion-production operator. While their contribution to this operator is finite, considering initial-and final-state distortions produces a linear divergence in its matrix elements. We renormalize this divergence by introducing a counterterm, whose value we choose in order to reproduce the threshold n p -> d pi0 cross section measured at TRIUMF. The energy-dependence of this cross section is then predicted in chiral perturbation theory, being determined by the production of p-wave pions, and also by energy dependence in the amplitude for the production of s-wave pions. With an appropriate choice of the counterterm, the chiral prediction for this energy dependence converges well.
dc.description25 pages, REVTeX4, 5 eps figures, 1 reference added, 1 removed, changed cutoffs shown in Table III, some improvements in the text and figures, conclusions unaltered, accepted by PRC
dc.identifierhttps://arxiv.org/abs/nucl-th/0511042
dc.identifierhttp://arxiv.org/abs/nucl-th/0511042
dc.identifierPhys.Rev.C73:024002,2006
dc.identifierdoi:10.1103/PhysRevC.73.024002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/189853
dc.subjectNuclear Theory
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Experiment
dc.titleThe near threshold N N -> d pi reaction in chiral perturbation theory
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