Author/Authors :
ALEPH Collaboration، نويسنده , , R Barate، نويسنده , , D Buskulic، نويسنده , , D Decamp، نويسنده , , P Ghez، نويسنده , , C Goy، نويسنده , , J.-P Lees، نويسنده , , A Lucotte، نويسنده , , M.-N Minard، نويسنده , , Nief، Francois نويسنده , , B Pietrzyk، نويسنده , , G Boix، نويسنده , , M.P. Casado، نويسنده , , M. Chmeissani، نويسنده , , J.M. Crespo، نويسنده , , M Delfino، نويسنده , , E Fernandez، نويسنده , , M. Fernandez-Bosman، نويسنده , , Ll. Garrido، نويسنده , , E Graugès، نويسنده , , et al.، نويسنده ,
Abstract :
The four jet topology is analysed in the ALEPH data taken between November 1995 and October 1997, at centre-of-mass energies ranging from 130 to 184 GeV. While an unexpected accumulation of events with a dijet mass sum around 105 GeV/c2 had been observed during the first run in 1995 at 130/136 GeV, corresponding to an integrated luminosity of 5.7 pb−1, no significant differences between data and standard model prediction is seen, either in the high energy runs (81.1 pb−1 taken at centre-of-mass energies from 161 to 184 GeV) or in the 7.1 pb−1 recorded during a new short run at 130/136 GeV in 1997. We have found no other explanation for the earlier reported “four jet anomaly” than a statistical fluctuation.
