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arXiv 1801.09730hep-ph
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异常介导的SUSY断裂模型的自然性改进

Anomaly mediated SUSY breaking model retrofitted for naturalness

Howard Baer, Vernon Barger, Dibyashree Sengupta

摘要:

异常介导的超对称破缺(AMSB)模型似乎变得越来越不可信,由于1。难以产生希格斯质量m(h)~125 GeV,2。典型的非自然超粒子谱,其特征在于大的超电势μ项和3.一个像葡萄酒一样的最轻超对称粒子(LSP)作为暗物质的可能性现在似乎被排除了。在本文中,我们提出了一些小的修改,解决这三个问题的范式模型。而不是添加一个通用的散装标量质量,以避免快子slepton,我们添加不同的希格斯和物质标量软质量,然后允许轻希格斯。为了与实测的Higgs质量相一致,我们还加入了体三线性软项。随后的自然广义AMSB(nAMSB)模型,然后有一组轻希格斯玻色子的质量附近的弱标度m(W,Z,h)~100 GeV的自然所需的,而winos填充几百GeV的范围和胶子和squarks占据多TeV的范围。对于LHC的搜索,维诺对的产生,然后衰变到相同符号的diboson签名通道提供了极好的前景,发现在高光度LHC随着higgsino对生产导致软双轻子加喷(s)+MET。一台线性e^+e^-对撞机在高于希格西诺对产生阈值的情况下运行,应该能够将AMSB的高吉诺谱与统一或海市蜃楼统一的情形区分开来。暗物质被认为是一种类似希格斯诺的弱相互作用粒子和轴子的混合物。

英文摘要:

Anomaly-mediated supersymmetry breaking (AMSB) models seem to have become increasingly implausible due to 1. difficulty in generating a Higgs mass m(h)~125 GeV, 2. typically unnatural superparticle spectra characterized by a large superpotential mu term and 3. the possibility of a wino-like lightest SUSY particle (LSP) as dark matter now seems to be excluded. In the present paper we propose some minor modifications to the paradigm model which solve these three issues. Instead of adding a universal bulk scalar mass to avoid tachyonic sleptons, we add distinct Higgs and matter scalar soft masses which then allow for light higgsinos. To gain accord with the measured Higgs mass, we also include a bulk trilinear soft term. The ensuing natural generalized AMSB (nAMSB) model then has a set of light higgsinos with mass nearby the weak scale m(W,Z,h)~100 GeV as required by naturalness while the winos populate the several hundred GeV range and gluinos and squarks occupy the multi-TeV range. For LHC searches, the wino pair production followed by decay to same-sign diboson signature channel offers excellent prospects for discovery at high luminosity LHC along with higgsino pair production leading to soft dileptons plus jet(s)+MET. A linear e^+e^- collider operating above higgsino pair production threshold should be able to distinguish the AMSB gaugino spectra from unified or mirage unified scenarios. Dark matter is expected to occur as a higgsino-like WIMP plus axion admixture.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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