Electron decay channel

The momentum and charge of electrons from decay may be determined by the bending in the magnetic field if they do not induce heavy showers in the emulsion. An electron is identified with high efficiency in the emulsion by looking at pairs produced along the trajectory by the conversion of bremsstrahlung 's or by electromagnetic calorimetry.

Here it is assumed that 90% of the electrons that can be followed outside the stack are identified. Therefore the candidate search can be done using the guidelines of the muon channel. The selection efficiencies are summarised in Tab. 4. The background estimates (Tab. 5) are obtained by just rescaling the one for the muon decay mode by the ratio of sensitivities.

  
Table 4: Sensitivity to

  
Table 5: Main sources of background for the electron decay channel.