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Worldline description of the Isgur-Wise function

N. G. Stefanis·A. I. Karanikas·C. N. Ktorides
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Abstract

An effective field theoretic description of the Isgur-Wise function in heavy-meson transitions is presented which emulates soft interactions by a fermion worldline with an infinitesimal self-intersecting loop. A point-splitting regularization technique is used, which replaces pointlike worldlines by ``ribbons'' in the sense of Witten. The calculated vertex function is correctly normalized, does not depend on the heavy-quark mass, and complies with different sets of recent experimental data of the ARGUS and CLEO collaborations.

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N. G. Stefanis, A. I. Karanikas, C. N. Ktorides. 1996-10-25. Worldline description of the Isgur-Wise function. https://arxiv.org/abs/hep-ph/9610491

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