Heavy standard model-like Higgs boson and a light stop from Yukawa-deflected gauge mediation
Heavy standard model-like Higgs boson and a light stop from Yukawa-deflected gauge mediation
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重标准模型般的希格斯玻色子和汤川偏转规范中介的光停止
DOI：
10.1103/physrevd.86.095020
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发表时间：
2012-03
期刊：
影响因子：
--
通讯作者：
Yang, Jin Min
中科院分区：
文献类型：
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作者：
Kang, Zhaofeng;Li, Tianjun;Liu, Tao;Tong, Chunli;Yang, Jin Min
在具有最小规范介导超对称破缺的最小超对称标准模型（GMSB）中，要获得125 GeV附近的类标准模型Higgs玻色子，需要在多TeV水平上进行重停，并引起严重的微调，这可以在具有可见-隐藏的直接汤川相互作用的变形GMSB（YGMSB）框架下得到改善.我们研究了YGMSB的一些一般特征，并重点研究了Higgs信使耦合（HYGMSB）的情况，它可以自动保持最小的味道违反。事实证明，这样的Yukawa调解场景可以给出大的-Lambda（t）和-m（（t）over波浪线L，R）（2），导致最大的停止混合，因此可以很容易地给出低于TeV量级的轻微停止（（t）over波浪线（1））。然而，我们发现，在最小HYGMSB方案中，m（Hu）（2）太大，然后电弱对称性破缺是不一致的大停止混合。为了解决这个问题，我们从两个方面修改了隐藏扇区，增加了一个新的强规范动力学或引入（10，（10）过棒）信使。对于每种情况下，我们提出了一些数值研究。
To obtain a standard model-like Higgs boson around 125 GeV in the minimal supersymmetric standard model with minimal gauge mediation of supersymmetry breaking (GMSB), a heavy stop at multi-TeV level is needed and incurs severe fine-tuning, which can be ameliorated in the framework of the deformed GMSB with visible-hidden direct Yukawa interactions (YGMSB). We examine some general features of the YGMSB and focus on the scenario with Higgs-messenger couplings (HYGMSB) which can automatically maintain the minimal flavor violation. It turns out that such a Yukawa mediation scenario can give a large -Lambda(t) and -m((t) over tildeL,R)(2), leading to a maximal stop mixing, and thus can readily give a light stop ((t) over tilde (1)) below the TeV scale. However, we find that in the minimal HYGMSB scenario, m(Hu)(2) is too large and then the electroweak symmetry breaking is inconsistent with the large stop mixing. To solve this problem, we modify the hidden sectors in two ways, adding a new strong gauge dynamics or introducing the (10, (10) over bar) messengers. For each case we present some numerical studies.