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arXiv 1905.09412hep-ph
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电流LHC约束下NMSSM中的带电希格斯玻色子

Charged Higgs bosons in the NMSSM under current LHC constraints

Zhaoxia Heng, Lin Guo, Pengqiang Sun, Wei Wei

摘要:

带电希格斯玻色子是超越SM的新物理学的重要预测。在这项工作中,我们进行了全面的扫描参数空间的NMSSM考虑各种实验的限制,包括直接搜索限制从13 TeV的大型强子对撞机,并考虑的情况下,次轻CP甚至希格斯玻色子是SM样的。我们发现带电的希格斯玻色子的质量可以轻到350 GeV,最轻的CP偶希格斯玻色子$h_1$主要是单态的,可以轻到48 GeV,最轻的CP奇希格斯玻色子$a_1$也是单态的,可以轻到82 GeV.荷电希格斯玻色子主要衰变为$t\bar{b}$或$\bar{t} b$,但奇异衰变$H^\pm\to W^\pm h_1$和$H^\pm\to W^\pm a_1$的分支比最大分别可达20%和11%,可用于区分NMSSM和MSSM.在13 TeV的LHC(亮度为36.1 $\rm fb^{-1}$)上无法探测到这样一个重荷希格斯玻色子,它的探测需要更高的能量和/或更高的亮度。

英文摘要:

Charged Higgs boson is a crucial prediction of new physics beyond the SM. In this work, we perform a comprehensive scan over the parameter space of NMSSM considering various experimental constraints including the direct search limits from the 13 TeV LHC, and consider the scenario that the next-to-lightest CP-even Higgs boson is SM-like. We find that the masses of charged Higgs bosons can be as light as 350 GeV, the lightest CP-even Higgs boson $h_1$ is predominantly singlet and can be as light as 48 GeV, and the lightest CP-odd Higgs boson $a_1$ is also singlet-dominated and can be as light as 82 GeV. The charged Higgs bosons mainly decay to $t\bar{b}$ or $\bar{t} b$, but the branching ratio of the exotic decays $H^\pm\to W^\pm h_1$ and $H^\pm\to W^\pm a_1$ can maximally reach to 20\% and 11\%, respectively, which can be used to distinguish the NMSSM from MSSM. Such a heavy charged Higgs boson is unaccessible at the 13 TeV LHC with a luminosity of 36.1 $\rm fb^{-1}$ and its detection needs higher energy and/or higher luminosity.

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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