arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0705.4117hep-ph
收藏

疏轻子Z'玻色子的类号双轻子信号

Like-sign dilepton signals from a leptophobic Z' boson

F. del Aguila, J. A. Aguilar-Saavedra

摘要:

一种新的轻子中性规范玻色子Z',其质量可轻至M_Z' ~ 350 GeV,但在LEP和Tevatron上仍未被探测到。这样的Z'玻色子可以从E6导出,如果在27表象中新的重中微子单线态比M_Z'/2轻,则可以观察到pp(pbar)-> Z' -> NN -> 1 +-1 +- X过程。事实上,这个新的信号可以解释在Tevatron发现的小过量的类符号双轻子。LHC的影响也进行了讨论。特别地,Tevatron过量可以用小于1 fb-1来确认,并且疏轻子Z'质量可以用30 fb-1探测到高达2.5 TeV。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑