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arXiv · 0705.4117

Like-sign dilepton signals from a leptophobic Z' boson

F. del Aguila·J. A. Aguilar-Saavedra
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Abstract

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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F. del Aguila, J. A. Aguilar-Saavedra. 2007-10-10. Like-sign dilepton signals from a leptophobic Z' boson. https://doi.org/10.1088/1126-6708%2F2007%2F11%2F072

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