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Concerning η$_{j}$ , most of signal lies above η = 0 , whereas 99 % of background is concentrated in − 2 < η$_{j}$ < 0 region. For this reasons below we use p$_{T}$ > 150 , | η$_{e}$ | < 4 and 0 < η$_{j}$ < 4 . 

With these cuts we present in Fig. 8 invariant mass distributions for signal and background. 

