Figure 5

Left panel shows the distribution of the measured energy-deposit of charged particles versus their momentum in the TPC The dashed lines delimit successively a $\pm 5\sigma$ then a $\pm 3\sigma$ selection of the kaon tracks using the ALEPH parameterization of the Bethe-Bloch curve (solid line) Right panel shows the relative difference between TOF measured times and that corresponding to a kaon mass hypothesis The dashed lines delimit a coarse fiducial region compatible with this kaon hypothesis.