6533b852fe1ef96bd12ab3f9

RESEARCH PRODUCT

An upper limit for Br(Z°→ggg) from symmetric 3-jet hadronic decays.

Delphi CollaborationReyes Alemany FernándezSusana Cabrera UrbánMaría Victoria Castillo GiménezEduardo Cortina GilAntonio Ferrer SoriaJuan A. Fuster VerdúCarmen García GarcíaJuan José Hernández ReyEmilio Higón RodríguezCarlos Lacasta LlácerFernando Martínez VidalSergio Navas ConchaJosé Salt Cairols

subject

Física nuclearPartícules (Física nuclear)

description

An upper limit for BR(Z0 → 3g) is obtained from a correlation method, which distinguishes statistically between quark and gluon jets by using the difference in their charged particle multiplicity distributions. From the sample of threefold symmetric three-jet events collected by the DELPHI experiment at LEP during 1991¿1994, the 95% confidence level upper limit is deduced to be: BR(Z0 → 3g) ≤ 1.6 × 10−2 for the JADE and BR(Z0 → 3g) ≤ 1.5 × 10−2 for the DURHAM jet-finder.

yearjournalcountryeditionlanguage
1996-01-01
10.1016/s0370-2693(96)01450-5http://hdl.handle.net/10550/33899