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arXiv 1105.1925hep-ph
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II型跷跷板模型中的Higgs势

The Higgs Potential in the Type II Seesaw Model

A. Arhrib, R. Benbrik, M. Chabab, G. Moultaka, M. C. Peyranere, L. Rahili, J. Ramadan

摘要:

我们在第二类跷跷板设置,相应的一般重正化的二重态/三重态希格斯势,取决于五个无量纲耦合和两个质量参数后,自发对称性破缺的动力学特征进行了详细的研究,并突出了希格斯现象的影响。特别是,我们确定i)完整的树级酉约束的耦合的潜力和ii)的确切的树级{ \sl所有方向}有界性从下面的约束这些耦合。当结合起来,这些约束精确地描绘了理论上允许的参数空间域在我们的微扰近似。在这个模型的七个物理希格斯态中,较轻(较重)的CP偶态h 0(H 0)的质量将始终满足理论上的上(下)界,该理论上的上(下)界是达到临界值mu_c(控制双重/三重希格斯玻色子之间的三重耦合的质量参数)。饱和的么正性界限,我们发现m_h0 < { \cal O}(0.7 - 1 TeV),而其余的希格斯粒子的上限位于几十TeV。然而,实际的质量可以轻得多。我们确定了两个政权对应于mu > mu_c和mu < mu_c。在第一种状态下,希格斯扇区通常非常重,只有变成SM样的h 0才能被LHC接近。相比之下,在第二个制度,有点忽视了在文献中,大部分的希格斯部门是轻的。特别是最重的状态H 0变得像SM一样,较轻的状态是CP奇希格斯粒子,(双)带电希格斯粒子和去耦的h 0,可能导致对撞机的独特现象。

英文摘要:

We perform in the type II seesaw setting, a detailed study of the dynamical features of the corresponding general renormalizable doublet/triplet Higgs potential that depends on five dimensionless couplings and two mass parameters after spontaneous symmetry breaking, and highlight the implications for the Higgs phenomenology. In particular, we determine i) the complete set of tree-level unitarity constraints on the couplings of the potential and ii) the exact tree-level {\sl all directions} boundedness from below constraints on these couplings. When combined, these constraints delineate precisely the theoretically allowed parameter space domain within our perturbative approximation. Among the seven physical Higgs states of this model, the mass of the lighter (heavier) CP-even state h0 (H0) will always satisfy a theoretical upper (lower) bound that is reached for a critical value mu_c of mu (the mass parameter controlling triple couplings among the doublet/triplet Higgses). Saturating the unitarity bounds we find m_h0 < {\cal O}(0.7 - 1 TeV), while the upper bound for the remaining Higgses lies in the several tens of TeV. However, the actual masses can be much lighter. We identify two regimes corresponding to mu > mu_c and mu < mu_c. In the first regime the Higgs sector is typically very heavy and only h0 that becomes SM-like could be accessible to the LHC. In contrast, in the second regime, somewhat overlooked in the literature, most of the Higgs sector is light. In particular the heaviest state H0 becomes SM-like, the lighter states being the CP-odd Higgs, the (doubly) charged Higgses and a decoupled h0, possibly leading to a distinctive phenomenology at the colliders.

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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