Split extended supersymmetry from intersecting branes
Split extended supersymmetry from intersecting branes
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从相交膜中分离扩展超对称性
DOI：
10.1016/j.nuclphysb.2006.03.012
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
M. Tuckmantel
中科院分区：
文献类型：
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作者：
I. Antoniadis;K. Benakli;Antonio Delgado;M. Quir'os;M. Tuckmantel
我们研究了分裂扩展超对称性的弦实现，最近在[I.安东尼亚迪斯等人。 hep-ph/0507192]。超对称性被 D 膜交叉角的小 (ϵ) 变形打破，给出了 m02∼ϵMs2 阶的树级质量，其中 M 是弦尺度，到局部标量。我们通过显式的单环弦振幅计算表明，高吉诺获得了分层更小的狄拉克质量 m1/2D∼m02/Ms。我们还评估了单环 higgsino 质量 μ，并表明，在没有树级贡献的情况下，它的行为为 μ∼m04/Ms3。最后，我们讨论使用大的额外维度来抑制尺度的另一种方法。对于规范玻色子以 N=4 表示形式出现的情况，通过具有标准模型规范群、三代夸克和轻子以及规范耦合统一的显式弦模型来说明后者。
We study string realizations of split extended supersymmetry, recently proposed in [I. Antoniadis, et al. hep-ph/0507192]. Supersymmetry is broken by small (ϵ) deformations of intersection angles of D-branes giving tree-level masses of order m02∼ϵMs2, where Msis the string scale, to localized scalars. We show through an explicit one-loop string amplitude computation that gauginos acquire hierarchically smaller Dirac masses m1/2D∼m02/Ms. We also evaluate the one-loop higgsino mass, μ, and show that, in the absence of tree-level contributions, it behaves as μ∼m04/Ms3. Finally we discuss an alternative suppression of scales using large extra dimensions. The latter is illustrated, for the case where the gauge bosons appear in N=4 representations, by an explicit string model with Standard Model gauge group, three generations of quarks and leptons and gauge coupling unification.