Generic and chiral extensions of the supersymmetric standard model
Generic and chiral extensions of the supersymmetric standard model
复制标题
超对称标准模型的一般和手性扩展
DOI：
10.1016/s0550-3213(99)00012-7
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
K. Matchev
中科院分区：
文献类型：
--
作者：
Hsin;B. Dobrescu;K. Matchev
我们构建了标准模型的扩展，其中规范对称和超对称防止了普朗克尺度物理在超对称标准模型中可能引起的危险的大效应。这些包括重子数违反、改变味道的中性电流、μ项，以及标准模型规范群下单线场或向量场的质量。为此，我们引入了一个额外的非异常U(1)μ规群。封闭扇区中的动态超对称破缺触发U(1)μ的破缺，并通过规范中介产生超伴子的软质量，其中标量可能从U(1)μ d项中得到相当大的贡献。我们发现了几类完备的可计算模型，在这些模型中，信使不存在宇宙学问题，中微子质量也可以被容纳。我们推导了这些模型中的粒子谱，并研究了其现象学结果。我们给出了潜在实验特征的详尽列表，并讨论了它们在即将到来的Tevatron运行中的可观测性。一类模型显示出有趣的新发现通道，即WWT， WγTand WZT，它们出现在次轻的超对称粒子是短寿命的SU(2) wneutrino的情况下。
We construct extensions of the Standard Model in which the gauge symmetries and supersymmetry prevent the dangerously large effects that may potentially be induced in a supersymmetric standard model by Planck scale physics. These include baryon number violation, flavor-changing neutral currents, the μ-term, and masses for singlet or vector-like fields under the Standard Model gauge group. For this purpose we introduce an extra non-anomalous U(1)μgauge group. Dynamical supersymmetry breaking in a secluded sector triggers the breaking of the U(1)μand generates soft masses for the superpartners via gauge mediation, with the scalars possibly receiving sizable contributions from the U(1)μD-term. We find several classes of complete and calculable models, in which the messengers do not present cosmological problems and neutrino masses can also be accommodated. We derive the sparticle spectrum in these models and study the phenomenological consequences. We give an exhaustive list of the potential experimental signatures and discuss their observability in the upcoming Tevatron runs. One class of models exhibits interesting new discovery channels, namely WWT, WγTand WZT, which arise when the next-to-lightest supersymmetric particle is a short-lived SU(2)wneutralino.