• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of high energy physics >Electroweak baryogenesis above the electroweak scale
【24h】

Electroweak baryogenesis above the electroweak scale

机译：Electroweak Baryogenesis以上的电挖出量

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A bstract Conventional scenarios of electroweak (EW) baryogenesis are strongly constrained by experimental searches for CP violation beyond the SM. We propose an alternative scenario where the EW phase transition and baryogenesis occur at temperatures of the order of a new physics threshold Λ far above the Fermi scale, say, in the 100–1000 TeV range. This way the needed new sources of CP-violation, together with possible associated flavor-violating effects, decouple from low energy observables. The key ingredient is a new CP- and flavor-conserving sector at the Fermi scale that ensures the EW symmetry remains broken and sphalerons suppressed at all temperatures below Λ. We analyze a minimal incarnation based on a linear O ( N ) model. We identify a specific large- N limit where the effects of the new sector are vanishingly small at zero temperature while being significant at finite temperature. This crucially helps the construction of realistic models. A number of accidental factors, ultimately related to the size of the relevant SM couplings, force N to be above ～ 100. Such a large N may seem bizarre, but it does not affect the simplicity of the model and in fact it allows us to carry out a consistent re-summation of the leading contributions to the thermal effective potential. Extensions of the SM Higgs sector can be compatible with smaller values N ～ 20–30. Collider signatures are all parametrically suppressed by inverse powers of N and may be challenging to probe, but present constraints from direct dark matter searches cannot be accommodated in the minimal model. We discuss various extensions that satisfy all current bounds. One of these involves a new gauge force confining at scales between ～ 1 GeV and the weak scale.
机译：通过超出SM超越SM的CP违规的实验搜索，Bstract常规场景强烈约束。我们提出了一种替代情景，其中EW相转变和Baryogry在新物理阈值λ远高于Fermi Scale的温度下发生，例如，在100-1000 Tev范围内。这样，所需的新侵犯新来源，以及可能的相关风味违规效果，从低能可观察到脱钩。关键的成分是一种新的CP-和风味节约扇区，其在FERMI标度下，确保EW对称性残留残留，并且在低于λ的所有温度下抑制斯巴仑。我们根据线性O（n）模型来分析最小化的化身。我们识别特定的大量限制，其中新扇区的效果在零温度下消失小，同时在有限温度下显着。这是有助于建设现实模型。一些意外因素，最终与相关SM耦合的大小相关，力n高于〜100.这样一个大的n可能看起来奇异，但它不会影响模型的简单性，实际上它允许我们对热有效潜力的主要贡献进行一致的重新求和。 SM HIGGS扇区的扩展可以与较小的值N〜20-30兼容。撞机签名全部是通过N的逆功率抑制的，并且可能对探测有挑战性，但是在最小模型中不能容纳来自直接暗物搜索的存在限制。我们讨论满足所有当前界限的各种扩展。其中一个涉及新的规格力在〜1 gev之间的尺度和弱尺寸之间限制。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号