标题： 可观测的中子反中子振荡在高尺度跷跷板模型中 显示英文标题

标题： Observable Neutron Antineutron Oscillation in High Scale Seesaw Models

摘要： 我们讨论一个基于规范群$SU(2)_L\times SU(2)_R\times SU(4)_c$的现实高尺度（$v_{BL}\sim 10^{12}$GeV）超对称 seesaw 模型，其中中子-反中子振荡可以在可观测的速率下发生。 这与简单的维度论证相反，这些论证认为$\tau_{N-\bar{N}}\propto v_{BL}^5$并因此如果 seesaw 尺度$v_{BL}\geq 10^{5}$GeV 则不可观测。 我们模型中速率增强的两个原因是：(i) 偶然全局对称性使得一些二夸克 Higgs 质量保持在弱尺度，(ii) 来自低维算符的新超对称贡献。 净结果是$\tau_{N-\bar{N}}\propto v_{BL}^2 v^3_{wk}$而不是$v^5_{BL}$，导致了增强。 该模型还可以通过轻子生成解释物质的起源，并且在 LHC 上可检验，因为轻的二夸克态可以被产生。 显示英文摘要

摘要： We discuss a realistic high scale ($v_{BL}\sim 10^{12}$ GeV) supersymmetric seesaw model based on the gauge group $SU(2)_L\times SU(2)_R\times SU(4)_c$ where neutron-anti-neutron oscillation can occur at an observable rate. This is contrary to the naive dimensional arguments which say that $\tau_{N-\bar{N}}\propto v_{BL}^5$ and is therefore unobservable if the seesaw scale $v_{BL}\geq 10^{5}$ GeV. Two reasons for the enhanced rate in our model are: (i) accidental global symmetries which keep some of the diquark Higgs masses at the weak scale and (ii) a new supersymmetric contribution from a lower dimensional operator. The net result is that $\tau_{N-\bar{N}}\propto v_{BL}^2 v^3_{wk}$ rather than $v^5_{BL}$, causing the enhancement. The model can also explain the origin of matter via leptogenesis and is testable at LHC where the light diquark states can be produced.