The chromo-polarizabilities of a heavy quark at weak coupling

Understand

We obtain the renormalization group improved expressions of the Wilson coefficients of the HQET Lagrangian with leading logarithmic approximation to ${\cal O}(1/m^3)$ for the spin-independent sector, which includes the heavy quark chromo-polarizabilites.

• Our analysis includes the effects induced by spectator quarks.
• We observe that the numerical impact of these logarithms is very large in most cases.