https://doi.org/10.1140/epja/i2005-10111-6
Original Article
The role of the pion pair term in the theory of the weak axial meson exchange currents
1
Dipartimento di Fisica, Università di Firenze, I-50019, Sesto Fiorentino (Firenze), Italy
2
Sezione di Firenze, Istituto Nazionale di Fisica Nucleare, I-50019, Sesto Fiorentino (Firenze), Italy
3
Institute of Nuclear Physics, Academy of Sciences of the Czech Republic, CZ-250 68, Řež, Czech Republic
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Received:
3
April
2005
Accepted:
29
June
2005
Published online:
5
September
2005
Abstract
The structure of the weak axial pion exchange current is discussed in various models. It is shown how the interplay of the chiral invariance and the double-counting problem restricts uniquely the form of the pion potential term, to the case when the nuclear dynamics is described by the Schrödinger equation with static nucleon-nucleon potential.
PACS: 11.40.Ha Partially conserved axial-vector currents – / 25.30.-c Lepton-induced reactions –
© Società Italiana di Fisica and Springer-Verlag, 2005
