Advances in High Energy Physics / 2013 / Article / Fig 6

Review Article

Ultrahigh Energy Neutrinos at the Pierre Auger Observatory

Figure 6

Distributions of the Area-over-Peak (AoP, see text) of the earliest station (a) and of the product of the AoP of the first four stations in the event (b). In each panel we show the distribution of the corresponding variable in background events (i.e., data events in the training sample as indicated in Table 2), and in simulated electron neutrino-charged current events. These are two of the ten variables depending on the AoP used in constructing the multivariate Fisher discriminant linear polynomial to optimize the separation between background and neutrino-induced showers. See text for more details on the remaining eight variables.

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