  Characteristic features of dynamical symmetry breaking are investigated in
Randall-Sundrum (RS) background. To study the influence of bulk fermion or bulk
gauge field I consider a five-dimensional four-fermion interaction model and a
non-Abelian gauge field theory as simple models where the chiral symmetry is
broken down dynamically. Using a four-dimensional Lagrangian induced from the
five-dimensional theory, I calculate the dynamically generated fermion mass and
show how the extra dimension affects the chiral phase transition in the RS
background.
