Like-sign dilepton signals from a leptophobic Z' boson

Details Like-sign dilepton signals from a leptophobic Z' boson Like-sign dilepton signals from a leptophobic Z' boson

2007-05-29

arxiv.org/abs/0705.4117v2

JHEP 0711:072,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 11 PS figures. Paper significantly enlarged to include analysis for LHC

Scientific paper

10.1088/1126-6708/2007/11/072

A new leptophobic neutral gauge boson Z' with small mixing to the Z can have a mass as light as M_Z' ~ 350 GeV, and still have escaped detection at LEP and Tevatron. Such a Z' boson can be derived from E6 and, if the new heavy neutrino singlets in the 27 representation are lighter than M_Z'/2, the process p p(pbar) -> Z' -> NN -> l+- l+- X is observable. Indeed, this new signal could explain the small excess of like-sign dileptons found at Tevatron. Implications for LHC are also discussed. In particular, the Tevatron excess could be confirmed with less than 1 fb-1, and leptophobic Z' masses up to 2.5 TeV can be probed with 30 fb-1.

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