arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0708.1785hep-ph
收藏

含$U(1)'$的MSSM体系在显式CP破坏情形下的电弱相变

Electroweak phase transition in MSSM with $U(1)'$ in explicit CP violation scenario

S. W. Ham, S. K. OH

摘要:

在具有额外$U(1)'$的最小超对称标准模型中,通过在Higgs扇区中引入非平凡CP破坏相,建立了强一阶电弱相变的可能性.我们发现在模型的参数空间中有一个很宽的区域允许强一级电弱相变。终止夸克的质量不必小于顶夸克的质量,以确保一级电弱相变是强的。发现了CP破坏相对相变强度的影响。当CP破坏的大小增加时,相变的强度减小。对于一个给定的CP破坏相,我们发现当模型具有较强的相变时,最轻的希格斯玻色子具有较大的质量。

英文摘要:

The possibility of a strongly first-order electroweak phase transition is established in the minimal supersymmetric standard model with an extra $U(1)'$, where a nontrivial CP violating phase is introduced in its Higgs sector. We find that there is a wide region in the parameter space of the model that allows the strongly first-order electroweak phase transition. The mass of stop quark need not be smaller than the top quark mass to ensure the first-order electroweak phase transition be strong. The effect of the CP violating phase upon the strength of the phase transition is discovered. The strength of the phase transition is reduced when the size of the CP violation is increased. For a given CP violating phase, we find that the model has a larger mass for the lightest Higgs boson when it has a stronger phase transition.

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。

↑