  We discuss some collider signatures of the brane world. In addition to the
usual bulk (closed string) fields and brane (open string) fields in the Type I
string picture, there are closed string fields, namely, twisted modes, which
are not confined on the branes but nonetheless are localized in the extra
compactified dimensions. While the coupling of the Standard Model (brane)
fields with a bulk mode (such as the graviton) is suppressed by powers of the
Planck mass, their coupling to a twisted mode is suppressed only by powers of
the string scale M_s, which can be as low as a few TeV. This means these
localized twisted fields can have important observable effects in the TeV
range, including resonances in dijet invariant mass distributions in \bar p p,
pp \to jets + X. Given the current lower bound on the fundamental
higher-dimensional Planck scale, the experimental effects of these twisted
fields may turn out to be larger than the effects of virtual and real KK
gravity modes. The collider signatures of anomalous U(1) gauge symmetries as
well as other phenomenological implications of the brane world are also
discussed.
