Heavy Hadron Chiral Perturbation Theory

Details Heavy Hadron Chiral Perturbation Theory Heavy Hadron Chiral Perturbation Theory

1992-08-24

arxiv.org/abs/hep-ph/9208244v1

Nucl.Phys.B396:183-204,1993; ERRATUM-ibid.B421:683-686,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

(19 pages, 4 figures available upon request, users Harvmac.tex), HUTP-92/A039

Scientific paper

10.1016/0550-3213(93)90263-O

The formalism and applications of chiral perturbation theory for hadrons containing a single heavy quark are discussed. We emphasize the utility of working directly with the velocity dependent ``super'' fields which appear in the chiral Lagrangian and whose interactions manifestly preserve heavy quark spin symmetry rather than their individual spin components. Chiral logarithm corrections to meson and baryon Isgur-Wise functions are found using these fields. We also identify a unique dimension-five operator which couples the axial vector Goldstone current to the heavy antitriplet baryon field $T_\Q$. We then compute the differential rate for the spin symmetry violating decay $T_b(v) \to T_c(v') \ell \bar{\v}_\ell \pi$. The ratio of this decay rate to that for the corresponding pure semileptonic transition can be studied away from the zero recoil point.

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