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

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Abreu, P. [--] Cortina Gil, Eduardo [UCL] DELPHI Collaboration [--]

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.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès libre
Publication date 1999
Language Anglais
Journal information "Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics" - Vol. 448, no.3-4, p. 311-319 (1999)
Peer reviewed yes
Publisher Elsevier BV * North-Holland ((Netherlands) Amsterdam)
issn 0370-2693
e-issn 1873-2445
Publication status Publié
Affiliation UCL - SST/IRMP - Institut de recherche en mathématique et physique
Links
Bibliographic reference Abreu, P. ; Cortina Gil, Eduardo ; DELPHI Collaboration ; et. al. Study of the four-jet anomaly observed at LEP center-of-mass energies of 130-GeV and 136-GeV . In: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 448, no.3-4, p. 311-319 (1999)
Permanent URL http://hdl.handle.net/2078.1/123240