The four-jet final state is analyzed to search for hadronic decays of pair-produced heavy particles. The analysis uses the ALEPH data collected at LEP in November 1995 at centre-of-mass energies of 130 and 136 GeV, corresponding to a total integrated luminosity of 5.7 pb-1. An excess of four jet events is observed with respect to the standard model predictions. In addition, these events exhibit an enhancement in the sum of the two di-jet masses around 105 GeV/c2. The properties of these events are studied and compared to the expectations from standard processes and to pair production hypotheses.
|Numero di pagine||19|
|Rivista||THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS|
|Stato di pubblicazione||Published - 2011|
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