arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1003.5100hep-ph
收藏

高费米子表象在TeV-scale跷跷板中的作用

Role of Higher Fermion Representations in TeV-scale Seesaw

Ivica Picek, Branimir Radovcic

摘要:

我们考虑的情况下,额外的矢量TeV尺度的费米子属于更高的弱同位旋多重态提供新的跷跷板介质。如果这些费米子具有非零超荷,它们的树能级交换产生不同于I型和III型跷跷板的新的跷跷板机制。为了使轻中微子产生Majorana质量,新的Dirac跷跷板介质被SM规范对称性限制为属于弱三重态和五重态。后者与两个同位旋3/2标量多重态结合,得到新的跷跷板公式m_v~v^6/M^5。它用M <TeV的新态再现了经验质量m_v~10 ^{-1} eV,可在LHC上检验。

英文摘要:

We consider a scenario in which additional vectorlike TeV-scale fermions belonging to higher weak-isospin multiplets provide new seesaw mediators. If these fermions have non-zero hypercharge, their tree-level exchange produces novel seesaw mechanism different from type I and III seesaw. In order to produce Majorana masses for light neutrinos, new Dirac seesaw mediators are constrained by the SM gauge symmetry to belong to a weak triplet and a five-plet. The latter, in conjunction with two isospin 3/2 scalar multiplets, leads to new seesaw formula m_ν~ v^6/M^5. It reproduces the empirical masses m_ν~ 10^{-1} eV by M < TeV new states, testable at the LHC.

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。

↑