The Isgur-Wise function to O(α s) from sum rules in the heavy quark effective theory
Abstract
Radiative corrections to both perturbative and non-perturbative contributions are added to existing calculations of the Isgur- Wise function ξ IW. To this end, we develop a method for calculating two-loop integrals in the heavy quark effective theory involving two different scales. The inclusion of O( αs) terms causes ξ IW to decrease as compared to the lowest order result and shows the importance of quantum effects. The slope parameter ϱ2 violates the bound given by de Rafael and Taron.
- Publication:
-
Physics Letters B
- Pub Date:
- March 1993
- DOI:
- 10.1016/0370-2693(93)90697-G
- arXiv:
- arXiv:hep-ph/9209277
- Bibcode:
- 1993PhLB..301..249B
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 11 pages, 2 figures (not included), (LaTeX), HD-THEP-92-40