QCD sum-rule calculation of the kinetic energy and chromo-interaction of heavy quarks inside mesons

We present a QCD sum-rule determination of the heavy-quark kinetic energy inside a heavy meson, -lambda(1)/2m(Q), which is consistent with the field-theory analog of the virial theorem. We obtain -lambda(1) approximate to (0.10 +/- 0.05) GeV2, significantly smaller than a previous sum-rule result, but in good agreement with recent determinations from the analysis of inclusive decays. We also present a new determination of the chrome-magnetic interaction, yielding lambda(2)(m(b)) = (0.15 +/- 0.03) GeV2. This implies m(B*)(2) - m(B)(2) = (0.60 +/- 0.12) GeV2, in good agreement with experiment. As a by-product of our analysis, we derive the QCD sum rules for the three form factors describing the meson matrix element of a velocity-changing current operator containing the gluon field-strength tensor.