On the Higher Order Corrections to Heavy Quark Effective Theory

Abstract

We show that the different ways of deriving the Heavy Quark Effective Theory (HQET) lead to equivalent theories. The equivalence can be established through a careful redefinition of the field variables. We demonstrate the equivalence to order $\frac{1}{m^5}$ in the presence of a constant electric field.

Comments: 17 pages, UR-1325, ER-40685-775