Two-body Pion Absorption on $^3He$ at Threshold

Details Two-body Pion Absorption on $^3He$ at Threshold Two-body Pion Absorption on $^3He$ at Threshold

1994-04-28

arxiv.org/abs/nucl-th/9404024v1

Phys.Rev.C50:2703-2709,1994

Physics

Nuclear Physics

Nuclear Theory

19, UHPHYDOR-94-2

Scientific paper

10.1103/PhysRevC.50.2703

It is shown that a satisfactory explanation of the ratio of the rates of the reactions $^3He(\pi^-,nn)$ and $^3He(\pi^-,np)$ for stopped pions is obtained once the effect of the short range two-nucleon components of the axial charge operator for the nuclear system is taken into account. By employing realistic models for the nucleon-nucleon interaction in the construction of these components of the axial charge operator, the predicted ratios agree with the empirical value to within 10-20\%.

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