Abstract :
In Heavy Quark Effective Theory the calculation of form factors of higher excited states in a non-relativistic framework suffers severe inconsistencies due to frame dependencies. We show how careful inclusion of the Wigner rotation of the spin of the light quark and a covariant description of the meson wave function resolves these inconsistencies. We match this onto HQET and compute the relevant form factors ξ12 and ξ32 to order v2. Corrections to the MQ → ∞ limit are considered.
