The selection of φ → K + K − candidates requires two oppositely-charged tracks that satisfy 0.1 < p T < 10 GeV/c, have at least 12 hits in the DCH, are consistent with originating from the primary interaction point, and satisfy kaon identification criteria based on dE/dx measurements and Cherenkov radiation. Tracks are assigned a kaon mass hypothesis and neutral two-track combinations are formed. Candidates are selected if their invariant mass is in the range 1.004 < m KK < 1.036 GeV/c 2 . This mass window is equivalent to about 4.5 standard deviations on either side of the nominal φ mass, where the RMS spread in the m KK distribution is due to both the natural φ width and the detector resolution. This relatively large acceptance is chosen to reduce the effect of a possible mass resolution difference between **data** and Monte Carlo, at the expense of signal-to-background sig-nificance.