论文标题
Dimension-5低尺度Pati-Salam中的Baryon-number违规
Dimension-5 baryon-number violation in low-scale Pati-Salam
论文作者
论文摘要
pati-salam的仪表玻色子不会在可肾小函数的水平上介导质子衰减，因此，可以构造$ su（4）\ otimes su（2）_ {r} $在相对较低的尺度下损坏的场景。在这封信中，我们表明这样的低尺度模型会产生尺寸-5操作员，即使操作员被普朗克量表抑制，也可以以不可接受的速率产生核子衰减。我们发现核子 - 末期极限与通常的介子 - 末期约束之间有一个有趣的互补性。此外，我们认为，当模型嵌入$ SO（10）$，从而降低抑制量表时，这些操作员通常会存在。在合理的假设下，断裂量表的下限可以被限制为高达$ \ MATHCAL {O}（10^{8}）$ GEV。
The gauge bosons of Pati-Salam do not mediate proton decay at the renormalisable level, and for this reason it is possible to construct scenarios in which $SU(4) \otimes SU(2)_{R}$ is broken at relatively low scales. In this Letter we show that such low-scale models generate dimension-5 operators that can give rise to nucleon decays at unacceptably large rates, even if the operators are suppressed by the Planck scale. We find an interesting complementarity between the nucleon-decay limits and the usual meson-decay constraints. Furthermore, we argue that these operators are generically present when the model is embedded into $SO(10)$, lowering the suppression scale. Under reasonable assumptions, the lower limit on the breaking scale can be constrained to be as high as $\mathcal{O}(10^{8})$ GeV.
