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/c(2) 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 fun at 130/136 GeV in 1997, We have found no other explanation for the earlier reported "four jet anomaly" than a statistical fluctuation. (C) 1998 Published by Elsevier Science B.V. RI ANTONELLI, ANTONELLA/C-6238-2011; Jones, Roger/H-5578-2011; Passalacqua, Luca/F-5127-2011; Murtas, Fabrizio/B-5729-2012; O'Shea, Val/G-1279-2010; Ferrante, Isidoro/F-1017-2012; Sanchez, Federico/F-5809-2012

Four-jet final state production in e(+)e(-) collisions at centre-of-mass energies ranging from 130 to 184 GeV

TRICOMI, Alessia Rita;
1998-01-01

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/c(2) 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 fun at 130/136 GeV in 1997, We have found no other explanation for the earlier reported "four jet anomaly" than a statistical fluctuation. (C) 1998 Published by Elsevier Science B.V. RI ANTONELLI, ANTONELLA/C-6238-2011; Jones, Roger/H-5578-2011; Passalacqua, Luca/F-5127-2011; Murtas, Fabrizio/B-5729-2012; O'Shea, Val/G-1279-2010; Ferrante, Isidoro/F-1017-2012; Sanchez, Federico/F-5809-2012
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/12073
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