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arXiv 1906.06173hep-ph
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用三个右手中微子超场精确预测$μν$ SSM中的希格斯玻色子质量

Precise prediction for the Higgs-Boson Masses in the $μν$SSM with three right-handed neutrino superfields

Thomas Biekötter, Sven Heinemeyer, Carlos Muñoz

摘要:

$μν$ SSM是标准模型(SM)的一个简单的超对称扩展,能够描述与实验一致的中微子物理。我们在一个混合的在壳层/ $\overline{\mathrm{DR}}$方案中对三代右手中微子的$μν$ SSM的中性标量扇区进行了完全的单圈重整化。我们计算了$μν$ SSM中性标量质量的全单圈修正。单回路的贡献是由可用的MSSM高阶校正补充。我们得到了与实验边界一致的类SM希格斯玻色子质量的数值结果,同时同意与中微子振荡数据。我们说明了独特的现象学的$μν$ SSM中的场景中,一个或多个右手sneutrinos轻于SM类希格斯玻色子,这可能是实质上与他们混合。一方面,通过直接寻找衰变为SM粒子的右手中微子,另一方面,通过测量类SM希格斯玻色子的质量及其耦合,这些情况在实验上是可以实现的。以这种方式,可以探测$μν$ SSM的参数空间,而不需要在碰撞器处提出模型相关搜索。最后,我们展示了如何$μν$ SSM可以同时容纳两个过剩测量LEP和大型强子对撞机在$\sim 96$ GeV的$1σ$水平,而在同一时间再现中微子质量和混合与中微子振荡测量。

英文摘要:

The $μν$SSM is a simple supersymmetric extension of the Standard Model (SM) capable of describing neutrino physics in agreement with experiments. We perform the complete one-loop renormalization of the neutral scalar sector of the $μν$SSM with three generation of right-handed neutrinos in a mixed on-shell/$\overline{\mathrm{DR}}$ scheme. We calculate the full one-loop corrections to the neutral scalar masses of the $μν$SSM. The one-loop contributions are supplemented by available MSSM higher-order corrections. We obtain numerical results for a SM-like Higgs-boson mass consistent with experimental bounds, while simultaneously agreeing with neutrino oscillation data. We illustrate the distinct phenomenology of the $μν$SSM in scenarios in which one or more right-handed sneutrinos are lighter than the SM-like Higgs boson, which might be substantially mixed with them. These scenarios are experimentally accessible, on the one hand, through direct searches of the right-handed sneutrinos decaying into SM particles, and on the other hand, via the measurements of the SM-like Higgs-boson mass and its couplings. In this way the parameter space of the $μν$SSM can be probed without the need to propose model dependent searches at colliders. Finally, we demonstrate how the $μν$SSM can simultaneously accommodate two excesses measured at LEP and LHC at $\sim 96$ GeV at the $1σ$ level, while at the same time reproducing neutrino masses and mixings in agreement with neutrino oscillation measurements.

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