arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1202.0822hep-phhep-th
收藏

来自CMSSM弦衍生切片的119-125 GeV希格斯

A 119-125 GeV Higgs from a string derived slice of the CMSSM

L. Aparicio, D. G. Cerdeno, L. E. Ibanez

摘要:

最近的实验提示,一个相对较重的希格斯粒子的质量在119-125 GeV的范围内有利于超对称的情况下,一个大的混合停止质量矩阵。已经表明,这是可能的约束最小超对称标准模型(CMSSM),但只有一个非常具体的三线性参数和软标量质量之间的关系,有利于A ~-2米的一个相对较轻的光谱,和相当大的值tan(β)。我们在这里描述了一个字符串派生的计划,其中第一个条件是自动的,第二个出现的结果,实施辐射EW对称性破缺和可行的中性伴子暗物质与WMAP的约束。更具体地说,我们认为模占主导地位的超对称性打破II型字符串紧化,并表明,它导致一个非常预测CMSSM样的计划,由于背景通量的小偏差。施加上述约束仅留下一个自由参数,其对应于总体比例。我们表明,在这个结构$A=-3\sqrt{2}m\approx -2m$和允许的参数空间tan(β)=38-41,导致119 GeV < m_h < 125 GeV。我们确定了该模型的可探测性,并表明LHC可以在7(8)TeV、5(2)fb^-1的光度下开始探测该模型,而在14 TeV和25 fb^-1的能量下,整个参数空间都是可探测的。此外,这种情况下可以托管具有正确属性的长寿命stau,以导致催化的BBN。最后,我们认为,人择论证可能有利于希格斯质量的最高值,这是与中性伴子暗物质,即,m_h~ 125GeV.

英文摘要:

The recent experimental hints for a relatively heavy Higgs with a mass in the range 119-125 GeV favour supersymmetric scenarios with a large mixing in the stop mass matrix. It has been shown that this is possible in the constrained Minimal Supersymmetric Standard Model (CMSSM), but only for a very specific relation between the trilinear parameter and the soft scalar mass, favouring A ~ -2m for a relatively light spectrum, and sizable values of tan(beta). We describe here a string-derived scheme in which the first condition is automatic and the second arises as a consequence of imposing radiative EW symmetry breaking and viable neutralino dark matter in agreement with WMAP constraints. More specifically, we consider modulus dominated SUSY-breaking in Type II string compactifications and show that it leads to a very predictive CMSSM-like scheme, with small departures due to background fluxes. Imposing the above constraints leaves only one free parameter, which corresponds to an overall scale. We show that in this construction $A=-3\sqrt{2}m\approx -2m$ and in the allowed parameter space tan(beta)=38-41, leading to 119 GeV < m_h < 125 GeV. We determine the detectability of this model and show that it could start being probed by the LHC at 7(8) TeV with a luminosity of 5(2) fb^-1, and the whole parameter space would be accessible for 14 TeV and 25 fb^-1. Furthermore, this scenario can host a long-lived stau with the right properties to lead to catalyzed BBN. We finally argue that anthropic arguments could favour the highest value for the Higgs mass that is compatible with neutralino dark matter, i.e., m_h~125 GeV.

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。

↑