Lattice implementation of the Isgur-Wise limit
- 1 April 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 45 (7) , R2183-R2187
- https://doi.org/10.1103/physrevd.45.r2183
Abstract
We construct the Isgur-Wise limit of QCD in a form appropriate for measurement by lattice-gauge-theory techniques. The coordinate-space fermion propagator in the presence of a background gauge field has a systematic expansion in powers of the inverse quark mass about the Isgur-Wise limit. The formulation permits a calculation of heavy-quark processes even when the momentum transfers are much larger than the inverse lattice spacing. Applications include semileptonic heavy-quark decay and scattering processes, including the computation of the nonperturbative part of the Isgur-Wise universal function. DOI: http://dx.doi.org/10.1103/PhysRevD.45.R2183 © 1992 The American Physical SocietyKeywords
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