论文标题
核子衰减和$ n $ - $ \ bar n $振荡在左右对称型号中具有较大的额外尺寸
Nucleon Decay and $n$-$\bar n$ Oscillations in a Left-Right Symmetric Model with Large Extra Dimensions
论文作者
论文摘要
我们在左右对称（LRS）模型中研究了包括质子和绑定的中子衰变以及$ n- \ bar n $振荡的重子侵入过程，其中Quarks和Leptons在额外的尺寸中具有局部的波形。在此模型中，我们表明，尽管可以轻松抑制bary骨侵入核的衰减远低于实验界限，但这并不能抑制$ n- \ bar n $ transitions，这可能在与当前限制相当的水平上发生。这与具有标准模型低能量有效场理论（SMEFT）的额度模型（SMEFT）的跨度模型中的定性相似。我们表明，实验数据意味着对质量尺度$ m_ {n \ bar n} $的下限表征了负责LRS模型中$ n- \ bar n $振荡的物理学，该物理学比使用SMEFT的额外维度模型中的$ N- \ bar n $振荡要高得多。我们的结果为新实验提供了进一步的动力，以搜索$ n- \ bar n $振荡。
We study baryon-number-violating processes, including proton and bound neutron decays and $n-\bar n$ oscillations, in a left-right-symmetric (LRS) model in which quarks and leptons have localized wavefunctions in extra dimensions. In this model we show that, while one can easily suppress baryon-number-violating nucleon decays well below experimental bounds, this does not suppress $n-\bar n$ transitions, which may occur at levels comparable to current limits. This is qualitatively similar to what was found in an extra-dimensional model with a Standard-Model low-energy effective field theory (SMEFT). We show that experimental data imply a lower limit on the mass scale $M_{n \bar n}$ characterizing the physics responsible for $n-\bar n$ oscillations in the LRS model that is significantly higher than in the extra-dimensional model using a SMEFT and explain the reason for this. Our results provide further motivation for new experiments to search for $n - \bar n$ oscillations.
