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arXiv 1110.0482hep-ph
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电弱重子生成与色标量

Electroweak Baryogenesis and Colored Scalars

Timothy Cohen, Aaron Pierce

摘要:

我们考虑了标准模型类希格斯玻色子玻色子的双圈有限温度有效势,允许希格斯玻色子玻色子与其他标量耦合。如果标量在颜色下变换,它们将为包含胶子的有效势贡献2圈图。这些双环效应可能比以前认识到的更强。对于质量为115 GeV的希格斯玻色子,它们可以将相变的强度提高3.5倍。正是这种效应的类似物使得最小超对称标准模型的微弱电弱重子生成窗口得以幸存。我们进一步阐明了这些2-循环图的重要性,通过对比模型与彩色标量模型与单重标量。我们的结论是重子生成有利于模型与浅色标量。这促使搜索成对产生的双射流共振或射流+缺失能量。

英文摘要:

We consider the 2-loop finite temperature effective potential for a Standard Model-like Higgs boson, allowing Higgs boson couplings to additional scalars. If the scalars transform under color, they contribute 2-loop diagrams to the effective potential that include gluons. These 2-loop effects are perhaps stronger than previously appreciated. For a Higgs boson mass of 115 GeV, they can increase the strength of the phase transition by as much as a factor of 3.5. It is the analogue of this effect that is responsible for the survival of the tenuous electroweak baryogenesis window of the Minimal Supersymmetric Standard Model. We further illuminate the importance of these 2-loop diagrams by contrasting models with colored scalars to models with singlet scalars. We conclude that baryogenesis favors models with light colored scalars. This motivates searches for pair-produced di-jet resonances or jet(s) + missing energy.

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