R parity violating minimal supergravity model
R parity violating minimal supergravity model
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DOI：
10.1103/physrevd.69.115002
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发表时间：
2003-09
影响因子：
5
通讯作者：
B. Allanach;A. Dedes;H. Dreiner
中科院分区：
文献类型：
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作者：
B. Allanach;A. Dedes;H. Dreiner
我们提出了具有一般破坏 R 宇称的最小超对称标准模型，重点关注最小超重力 (mSUGRA)。我们讨论超对称中轻子数破坏的起源。我们计算了规范耦合、超势参数和所有软超对称破缺参数的全套耦合单环重整化群方程。我们提供了标量势最小化条件的解析公式，该公式可以迭代到任意精度。我们在一般基础上计算超粒子和中微子的低能谱，作为统一尺度上一小组参数的函数。专门针对 mSUGRA，我们使用中微子质量来为 R 宇称破坏耦合设定新的界限。这些限制比以前的限制严格了五个数量级。此外，还导出了 R 宇称破坏耦合的新界限，需要非快子中微子谱。我们研究了最轻的超对称粒子的性质，并在参数空间中找到了广泛的区域，其中它不是中性子。这导致了一组新颖的超对称签名，我们对其进行了分类。
We present the minimal supersymmetric standard model with general broken R-parity, focusing on minimal supergravity (mSUGRA). We discuss the origins of lepton number violation in supersymmetry. We have computed the full set of coupled one-loop renormalization group equations for the gauge couplings, the superpotential parameters and for all the soft supersymmetry breaking parameters. We provide analytic formule for the scalar potential minimization conditions which may be iterated to arbitrary precision. We compute the low-energy spectrum of the superparticles and the neutrinos as a function of the small set of parameters at the unification scale in the general basis. Specializing to mSUGRA, we use the neutrino masses to set new bounds on the R-parity violating couplings. These bounds are up-to five orders of magnitude stricter than the previously existing ones. In addition, new bounds on the R-parity violating couplings are also derived demanding a non-tachyonic sneutrino spectrum. We investigate the nature of the lightest supersymmetric particle and find extensive regions in parameter space, where it is not the neutralino. This leads to a novel set of supersymmetric signatures, which we classify.