Loop induced Higgs and Z boson couplings to Neutralinos and implications for collider and Dark Matter searches
Loop induced Higgs and Z boson couplings to Neutralinos and implications for collider and Dark Matter searches
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环路诱导希格斯玻色子和 Z 玻色子与中性子的耦合及其对对撞机和暗物质搜索的影响
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
M. Mühlleitner
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文献类型：
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作者：
A. Djouadi;M. Drees;P. F. Pérez;M. Mühlleitner
在最小超对称标准模型中计算了两个类高吉诺中性伴子与Z玻色子和Higgs玻色子的单圈诱导耦合。这些在树层次上消失的耦合可以通过费米子和超费米子的循环产生。我们表明，虽然中性伴子对不可见的Z玻色子衰变宽度的贡献仍然很小，但与最轻的希格斯玻色子的环诱导耦合可能足够大，以产生这种希格斯玻色子的不可见衰变率，这应该在未来的e + e −对撞机上检测到。我们还研究了这些耦合的直接搜索暗物质的影响，并表明，它们可以修改相当中性的非核子弹性截面的一些参数范围。
We calculate the one-loop induced couplings of two gaugino–like neutralinos to the Z and Higgs bosons in the Minimal Supersymmetric Standard Model. These couplings, which vanish at the tree level, can be generated through loops involving fermions and sfermions. We show that, while the neutralino contribution to the invisible Z boson decay width remains small, the loop induced couplings to the lightest Higgs boson might be sufficiently large to yield a rate of invisible decaysof this Higgs boson that should be detectable at future e + e − colliders. We also study the implications of these couplings for direct searches of Dark Matter and show that they can modify appreciably the neutralino–nucleon elastic cross section for some parameter range.