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

• Main Authors: BARATE, R., THULASIDAS, Manoj
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 1998
• Subjects: Databases and Information Systems; Programming Languages and Compilers
• Online Access: https://ink.library.smu.edu.sg/sis_research/5715; https://ink.library.smu.edu.sg/context/sis_research/article/6718/viewcontent/ppe_97_156.pdf
• Institution: Singapore Management University

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 pb1 , no significant dierences between data and standard model prediction is seen, either in the high energy runs (81.1 pb1 taken at centre-of-mass energies from 161 to 184 GeV) or in the 7.1 pb1 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 uctuat