Author/Authors :
A search for ?+??qq (? = e، نويسنده , , ?) four-fermion final states in high multiplicity events has been performed at s?mZ and above the Z peak at s=130 GeV and s=136 GeV. The data taken with OPAL correspond to an integrated luminosity of 132.4 pb?1 and 5.3 pb?1 at s?mZ and s=130?136 GeV، نويسنده , , respectively. While at the Z resonance the data are in good agreement with the Standard Model predictions، نويسنده , , we find more events than expected at s=130?136 GeV، نويسنده , , especially in the ?+??qq channel، نويسنده , , where 5 events remain after all cuts، نويسنده , , with only 0.6 predicted by the Monte Carlo simulation. For all center-of-mass energies the observed shapes of the differential distributions are consistent with the predictions.، نويسنده ,
Abstract :
OPAL Collaboration, G. Alexander, J. Allison, N. Altekamp, K. Ametewee, K.J. Anderson, S. Anderson, S. Arcelli, S. Asai, D. Axen, G. Azuelos, A.H. Ball, E. Barberio, R.J. Barlow, R. Bartoldus, J.R. Batley, G. Beaudoin, J. Bechtluft, C. Beeston, T. Behnke, et al.
