Study of the four-jet anomaly observed at LEP center-of-mass energies of 130-GeV and 136-GeV

Abreu, P.;Cortina Gil, Eduardo;DELPHI Collaboration;et.al.
(1999) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 448, n° 3-4, p. 311-319 (1999)

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The four-jet events collected by DELPHI during the special LEP run at centre-of-mass energies of 130 and 136View the MathML source in 1997 with an integrated luminosity of View the MathML source are analysed. Their rate and the distributions of their di-jet masses, their smallest jet charges, and their di-jet charge separations all agree well with Standard Model predictions. Thus the hypothesis of pair production of a new particle with a sum of di-jet masses around View the MathML source is not supported. The combined result of the four LEP collaborations refuting this hypothesis at over 99% confidence level is also given.
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Abreu, P., Cortina Gil, E., DELPHI Collaboration, & et al. (1999). Study of the four-jet anomaly observed at LEP center-of-mass energies of 130-GeV and 136-GeV. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 448(3-4), 311-319. https://doi.org/10.1016/S0370-2693(99)00066-0 (Original work published 1999)