  The {\it zitterbewegung region} is studied in this paper and we investigate
the possible presence of a new force in this region.This force was first
proposed by Sidharth in \cite{cu-bgs}. This article intends to study the
existence of a fifth force. Here, essentially, equations that characterize new
particles and their antiparticles are obtained. In this manner a pedestal is
built for a field theoretic approach that will be the subject of the second
part of this theory.
