Quark Condensate in the Deuteron

Details Quark Condensate in the Deuteron Quark Condensate in the Deuteron

2000-03-24

arxiv.org/abs/nucl-th/0003055v1

Phys.Rev. C61 (2000) 055202

Physics

Nuclear Physics

Nuclear Theory

to appear in Physics Review C (19 pages, 3 figures)

Scientific paper

10.1103/PhysRevC.61.055202

We study the changes produced by the deuteron on the QCD quark condensate by means the Feynman-Hellmann theorem and find that the pion mass dependence of the pion-nucleon coupling could play an important role. We also discuss the relation between the many body effect of the condensate and the meson exchange currents, as seen by photons and pions. For pion probes, the many-body term in the physical amplitude differs significantly from that of soft pions, the one linked to the condensate. Thus no information about the many-body term of the condensate can be extracted from the pion-deuteron scattering length. On the other hand, in the Compton amplitude, the relationship with the condensate is a more direct one.

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