The FOCUS experiment is designed to investigate charm particle decays. These charm particles are produced by the interaction of a photon beam with an average energy of 175 GeV on a BeO target and travel an average of few millimeters before decaying in the spectrometer. By reconstructing the daughters from the decay, we can infer properties of the charm particles.
Agostino, Lorenzo, "Pseudoscalar Semileptonic Decays of the D0 Meson" (2004). University Libraries Digitized Theses 189x-20xx. 166.