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arXiv 0707.4543hep-ph
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具有显式CP破坏的MNMSSM体系的电弱相变

Electroweak phase transition in the MNMSSM with explicit CP violation

S. W. Ham, J. O. Im, S. K. OH

摘要:

在最小非最小超对称标准模型(MNMSSM)的显式CP破坏情形下,考虑顶夸克和终止夸克环的辐射修正,在单圈水平上研究了强一阶电弱相变(EWPT)的可能性.假设终止夸克质量不简并,由于终止夸克的辐射修正引起CP相,这触发了MNMSSM的Higgs扇区中的标量-赝标混合。较轻的终止夸克不必总是具有小质量,以确保强的一阶EWPT。在具有明确CP破坏的MNMSSM中,发现一阶EWPT的强度取决于几个因素,如最轻的中性希格斯玻色子质量和由终止夸克质量产生的非平凡CP相.这些因素的影响进行了讨论。

英文摘要:

In explicit CP violation scenario of the minimal non-minimal supersymmetric standard model (MNMSSM), the possibility of a strongly first-order electroweak phase transition (EWPT) is investigated at the one-loop level, where the radiative corrections from the loops of the top and stop quarks are taken into account. Assuming that the stop quark masses are not degenerate, the radiative corrections due to the stop quarks give rise to a CP phase, which triggers the scalar-pseudoscalar mixing in the Higgs sector of the MNMSSM. The lighter stop quark need not always to have a small mass in order to ensure the strongly first-order EWPT. In the MNMSSM with explicit CP violation, it is found that the strength of the first-order EWPT depends on several factors, such as the lightest neutral Higgs boson mass and the nontrivial CP phase arising from stop quark masses. The effects of these factors are discussed.

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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