PCAC relation for Dstar -> D axial form factors
Claudio O. Dib, J. Taron
Abstract
A relation among the form factors of <D Aμ D*> at q2 0 is derived. It is verified to lowest order in both the 1/mc expansion and the expansion in number of derivatives using the effective lagrangian that incorporates the heavy quark symmetries for the b and c quarks, and the chiral symmetry for the u, d, s quarks.
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