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arXiv 1202.2845hep-ph
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辐射修正引起的超对称破缺

Supersymmetry breaking induced by radiative corrections

Borut Bajc, Stéphane Lavignac, Timon Mede

备注：
22 pages, 3 figures. Two references added, small redactional changes, some discussion improved. Results unchanged
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摘要：

我们表明，同时规范和超对称性破缺可以诱导辐射修正，一个la科尔曼-温伯格。当超势参数之间存在一定的相关性时，在规范非单态场的有效势中，在树能级势几乎平坦的区域，发现了局部超势破缺极小值。超对称性破缺通过规范环和手征信使环传递到MSSM，从而避免了直接规范中介模型中对高吉诺质量的抑制。使用一个单一的领域，确保没有危险的快子标量质量产生在一个循环的水平。我们用一个基于SU（5）模型的例子来说明这个机制。一个有趣的特点的情况是，大统一的规模增加相对于标准统一，从而允许一个更大的颜色希格斯三重态质量，作为首选的实验下限的质子寿命。

英文摘要：

We show that simultaneous gauge and supersymmetry breaking can be induced by radiative corrections, a la Coleman-Weinberg. When a certain correlation among the superpotential parameters is present, a local supersymmetry-breaking minimum is found in the effective potential of a gauge non-singlet field, in a region where the tree-level potential is almost flat. Supersymmetry breaking is then transmitted to the MSSM through gauge and chiral messenger loops, thus avoiding the suppression of gaugino masses characteristic of direct gauge mediation models. The use of a single field ensures that no dangerous tachyonic scalar masses are generated at the one-loop level. We illustrate this mechanism with an explicit example based on an SU(5) model with a single adjoint. An interesting feature of the scenario is that the GUT scale is increased with respect to standard unification, thus allowing for a larger colour Higgs triplet mass, as preferred by the experimental lower bound on the proton lifetime.

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