Analysis of the Low-Energy Theorem for γp \to p π^0

Details Analysis of the Low-Energy Theorem for γp \to p π^0 Analysis of the Low-Energy Theorem for γp \to p π^0

1995-06-28

arxiv.org/abs/nucl-th/9506025v1

Z.Phys. A354 (1996) 329-332

Physics

Nuclear Physics

Nuclear Theory

5 pages, Revtex, no figures, no tables

Scientific paper

The derivation of the `classical' low-energy theorem (LET) for \gamma p \rightarrow p\pi^0 is re-examined and compared to chiral perturbation theory. Both results are correct and are not contradictory; they differ because different expansions of the same quantity are involved. Possible modifications of the extended partially conserved axial-vector current relation, one of the starting points in the derivation of the LET, are discussed. An alternate, more transparent form of the LET is presented.

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