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arXiv 1204.2645hep-ph
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有效SUSY方案中重超粒子的去耦合:统一、Higgs质量和快子边界

Decoupling heavy sparticles in Effective SUSY scenarios: Unification, Higgs masses and tachyon bounds

C. Tamarit

摘要:

利用实现重标量解耦的双圈重整化群方程,研究了在单个低能Higgs场的极限下的有效超对称性方案.规范耦合统一持有类似或更好的精度比标准MSSM的情况。b-tau统一检查,希格斯质量计算使用的有效势,包括两个循环的贡献标量。一个125 GeV的希格斯玻色子与300 GeV左右的stops/sbottoms是相容的,如果在这个尺度上的一些三线性耦合的值在1-2 TeV的量级,则在重粒子尺度上具有非普适边界条件;如果受msugra或规范调解启发的更多约束的边界条件被设置在更高的尺度上,则通常需要更重的有色粒子。最后,由于解耦RG流的第三代标量质量非常显着地偏离MSSM DR-酒吧之一,光标量快子边界被重新访问,并显示放松高达TeV或更多。

英文摘要:

Using two-loop renormalization group equations implementing the decoupling of heavy scalars, Effective SUSY scenarios are studied in the limit in which there is a single low energy Higgs field. Gauge coupling unification is shown to hold with similar or better precision than in standard MSSM scenarios. b-tau unification is examined, and Higgs masses are computed using the effective potential, including two-loop contributions from scalars. A 125 GeV Higgs is compatible with stops/sbottoms at around 300 GeV with non-universal boundary conditions at the scale of the heavy sparticles if some of the trilinear couplings at this scale take values of the order of 1-2 TeV; if more constrained boundary conditions inspired by msugra or gauge mediation are set at a higher scale, heavier colored sparticles are required in general. Finally, since the decoupled RG flow for third-generation scalar masses departs very significantly from the MSSM DR-bar one, tachyon bounds for light scalars are revisited and shown to be relaxed by up to a TeV or more.

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