Influence of nucleonic motion in relativistic Fermi gas inclusive responses

impulsive hadronic descriptions of electroweak processes in nuclei involve two distinctly different elements: one stems from the nuclear many-body phy sics - the medium - which is rather similar for the Various inclusive respo nse functions, and the other embodies the responses of the hadrons themselv es to the electroweak probe and varies with the channel selected. In this L etter we investigate within the context of the relativistic Fermi gas in bo th the quasi-elastic and N --> Delta regimes the interplay between these tw o elements. Specifically, we focus on expansions in the one small parameter in the problem, namely, the momentum of a nucleon in the initial wave func tion compared with the hadronic scale, the nucleon mass. Both parity-conser ving and -violating inclusive responses are studied and the interplay betwe en longitudinal (L) and transverse (T and T') contributions is highlighted. (C) 2001 Elsevier Science B.V. All rights reserved.