Universal τ_{1/2}(y) IsgurWise function at the nexttoleading order in QCD sum rules
Abstract
We use QCD sum rules, in the framework of the heavy quark effective theory, to calculate the universal form factor τ_{1/2}(y) parametrizing the semileptonic transitions B>D_{0}lν¯, B>D^{*}_{1}lν¯, where D_{0} and D^{*}_{1} are the members of the excited charmed doublet with J^{P}=(0^{+}_{1/2},1^{+}_{1/2}). We include twoloop corrections in the perturbative contribution to the sum rule, and present a complete nexttoleading order result. As a preliminary part of our analysis we also compute, up to order α_{s}, the leptonic constant F^{+} of the doublet D_{0}, D^{*}_{1}. Finally, we discuss the phenomenological implications of this calculation.
 Publication:

Physical Review D
 Pub Date:
 December 1998
 DOI:
 10.1103/PhysRevD.58.116005
 arXiv:
 arXiv:hepph/9804377
 Bibcode:
 1998PhRvD..58k6005C
 Keywords:

 11.55.Hx;
 12.39.Hg;
 13.20.He;
 Sum rules;
 Heavy quark effective theory;
 Decays of bottom mesons;
 High Energy Physics  Phenomenology
 EPrint:
 RevTex, 29 pages, 3 figures