ABSTRACT
This chapter tries to answer the questions why hadron machines look very promising for B physics studies. It shows what are the problems in b hadron detection, and explains how these are solved in three experiments, CDF, an example of a general purpose collider experiment, HERA-B, a fixed target experiment, and BTeV, a specially designed collider experiment in the forward direction. When designing a detector for b hadrons at a hadron machine, several issues are considered. High interaction rates are needed because of the rather low ratio of the signal cross section to the total cross section. Two approaches are used in developing selective triggers with good background suppression. The first approach relies on the fact that the decay products of a B meson have rather high transverse momenta in few-body final states. A second approach takes advantage of the displacement of the decay vertices of b hadrons from the interaction point.
