The Off-diagonal Goldberger-Treiman Relation and Its Discrepancy

Details The Off-diagonal Goldberger-Treiman Relation and Its Discrepancy The Off-diagonal Goldberger-Treiman Relation and Its Discrepancy

2002-07-24

arxiv.org/abs/hep-ph/0207304v2

Phys.Rev. D66 (2002) 076008

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 1 eps figure

Scientific paper

10.1103/PhysRevD.66.076008

We study the off-diagonal Goldberger-Treiman relation (ODGTR) and its discrepancy (ODGTD) in the N, Delta, pi sector through O(p^2) using heavy baryon chiral perturbation theory. To this order, the ODGTD and axial vector N to Delta transition radius are determined solely by low energy constants. Loop corrections appear at O(p^4). For low-energy constants of natural size, the ODGTD would represent a ~ 2% correction to the ODGTR. We discuss the implications of the ODGTR and ODGTD for lattice and quark model calculations of the transition form factors and for parity-violating electroexcitation of the Delta.

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