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arXiv 1303.6465hep-ph
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含有右手中微子的NMSSM中的希格斯玻色子质量

Higgs boson mass in NMSSM with right-handed neutrino

Wenyu Wang, Jin Min Yang, Lin Lin You

摘要:

在超对称性中,为了获得质量中微子,需要引入右手中微子/超中微子超场($N$)。在NMSSM(带有单重态$S$的MSSM)的框架中,当$S$发展出vev(自由Majorana质量项被假定的$Z_3$对称性所禁止)时,这种扩展将通过$SNN$耦合动态地导致右手中微子的TeV尺度的Majorana质量。此外,通过$SNN$和$SH_uH_d$的耦合,类SM的希格斯玻色子($H_u$、$H_d$和$S$的混合物)可以自然地与右手中微子/sneutrino耦合。因此,TeV尺度的右手中微子/超中微子可能对希格斯玻色子的质量有很大贡献。通过精确计算,我们发现希格斯玻色子的质量确实可以被右手中微子/超中微子改变.这种新的贡献有助于推高类SM的希格斯玻色子玻色子的质量,从而使NMSSM更自然。

英文摘要:

In order to have massive neutrinos, the right-handed neutrino/sneutrino superfield ($N$) need to be introduced in supersymmetry. In the framework of NMSSM (the MSSM with a singlet $S$) such an extension will dynamically lead to a TeV-scale Majorana mass for the right-handed neutrino through the $SNN$ coupling when $S$ develops a vev (the free Majorana mass term is forbidden by the assumed $Z_3$ symmetry). Also, through the couplings $SNN$ and $SH_uH_d$, the SM-like Higgs boson (a mixture of $H_u$, $H_d$ and $S$) can naturally couple with the right-handed neutrino/sneutrino. As a result, the TeV-scale right-handed neutrino/sneutrino may significantly contribute to the Higgs boson mass. Through an explicit calculation, we find that the Higgs boson mass can indeed be sizably altered by the right-handed neutrino/sneutrino. Such new contribution can help to push up the SM-like Higgs boson mass and thus make the NMSSM more natural.

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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