arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1001.2162hep-ph
收藏

含TeV中微子的左右对称模型中的双跷跷板机制

Double seesaw mechanism in a left-right symmetric model with TeV neutrinos

F. M. L. de Almeida, Y. A. Coutinho, J. A. Martins Simões, A. J. Ramalho, L. Ribeiro Pinto, S. Wulck, M. A. B do Vale

摘要:

本文讨论了一个左右对称模型,模型中引入了新的镜像费米子和一个含有两个二重态和中性标量单重态的Higgs扇形。推广了跷跷板机制,不仅包括中微子质量,还包括带电费米子质量。重中微子的光谱呈现第二个跷跷板质量矩阵,中微子质量自然在TeV区域。该模型对新的中性矢量规范玻色子有非常清晰的特征。两类模型进行了讨论。新的镜像中微子可以非常轻,并且新的$Z^{\prime}$可以通过非常高的不可见分支分数与其他模型区分开来。另一种可能性是镜像中微子的质量自然在TeV范围内,并且可以通过$Z^{\prime}$衰变成重中微子对而产生。在LHC能量的模型的签名和生产过程中也提出。

英文摘要:

A left-right symmetric model is discussed with new mirror fermions and a Higgs sector with two doublets and neutral scalar singlets. The seesaw mechanism is generalized, including not only neutrino masses but also charged fermion masses. The spectrum of heavy neutrinos presents a second seesaw mass matrix and has neutrinos masses naturally in the TeV region. The model has very clear signatures for the new neutral vector gauge bosons. Two classes of models are discussed. New mirror neutrinos can be very light and a new $Z^{\prime}$ can be discriminated from other models by a very high invisible branching fraction. The other possibility is that mirror neutrinos can have masses naturally in the TeV region and can be produced through $Z^{\prime}$ decays into heavy neutrino pairs. Signatures and production processes for the model at the LHC energy are also presented.

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。

↑