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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We have searched for a heavy neutral gauge boson, Z', using the decay channel Z' --> ee. The data were collected with the DO detector at the Fermilab Tevatron during the 1992-1993 <p(p)over bar> collider run at root s = 1.8 TeV from an integrated luminosity of 15 +/- 1 pb(-1). Limits are set on the cross section times branching ratio for the process <p(p)over bar> --> Z' --> ee as a function of the Z' mass. We exclude the existence of a Z' of mass less than 490 GeV/c(2), assuming a Z' with the same coupling strengths to quarks and leptons as the standard model Z boson.