arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1507.07550hep-ph
收藏

最小亲中性双Higgs偶态模型的生存性

On the Viability of Minimal Neutrinophilic Two-Higgs-Doublet Models

P. A. N. Machado, Y. F. Perez, O. Sumensari, Z. Tabrizi, R. Zukanovich Funchal

摘要:

我们研究的限制,电弱精确的数据可以施加,希格斯玻色子的LHC发现后,亲中微子的两个希格斯二重态模型,其中包括一个额外的$SU(2)\times U(1)$二重态和一个新的对称性,即一个自发破缺的$\mathbb{Z}_2$或软破缺的全球$U(1)$。在这些模型中,额外的希格斯双重态,通过其非常小的真空期望值,是中微子质量的唯一原因。我们发现,具有$\mathbb{Z}_2$对称性的模型基本上被电弱精确数据排除,即使该模型稍微扩展到包括额外的右手中微子,由于存在一个非常轻的标量。虽然另一个模型仍然完全可行,但参数空间受到当前数据的极大限制,特别是受到$T$参数的限制。特别是,新的带电标量和中性标量必须具有非常相似的质量。

英文摘要:

We study the constraints that electroweak precision data can impose, after the discovery of the Higgs boson by the LHC, on neutrinophilic two-Higgs-doublet models which comprise one extra $SU(2)\times U(1)$ doublet and a new symmetry, namely a spontaneously broken $\mathbb{Z}_2$ or a softly broken global $U(1)$. In these models the extra Higgs doublet, via its very small vacuum expectation value, is the sole responsible for neutrino masses. We find that the model with a $\mathbb{Z}_2$ symmetry is basically ruled out by electroweak precision data, even if the model is slightly extended to include extra right-handed neutrinos, due to the presence of a very light scalar. While the other model is still perfectly viable, the parameter space is considerably constrained by current data, specially by the $T$ parameter. In particular, the new charged and neutral scalars must have very similar masses.

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。

↑