• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>CETUP* 2012 >On the likely dominance of WIMP annihilation to ff +W/Z (and implication for indirect detection)
【24h】

On the likely dominance of WIMP annihilation to ff +W/Z (and implication for indirect detection)

机译：关于WIMP湮灭到FF + W / Z的可能主导地位（以及间接检测的含义）

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

摘要

Arguably, the most popular candidate for Dark Matter (DM) is a massive, stable, Majorana fermion. However, annihilation of Majorana DM to two fermions features a helicity-suppressed s-wave rate. Radiating a gauge boson via electroweak (EW) and electromagnetic (EM) bremsstrahlung removes this s-wave suppression. The main purpose of this talk is to explain in some detail why the branching ratio Br(→ f f) is suppressed while Br(→ f f +W/Z/γ) is not. In doing so, we investigate the general conditions for s-wave suppression and un-suppression using Fierz transformations and partial wave expansions. Suppression for the 2→2 process is sufficiently severe that the EW and EM bremsstrahlung are likely to be the dominant modes of gauge-singlet Majorana DM annihilation.We end this talk with a discussion of the challenge presented by space-based data for Majorana DM models, given that the enhanced rate to radiatedW and Z gauge bosons and their dominant decay via hadronic channels tends to produce more antiprotons than are observed.
机译：可以说，暗物质（DM）最受欢迎的候选人是一种巨大的，稳定的马太基亚美食家。然而，Majorana DM到两个费晶湮灭具有螺旋度抑制的S波率。通过Electroweak（EW）和电磁（EM）Bremsstrahlung去除该S波抑制。此谈话的主要目的是在一些细节中解释为什么BR（→F f + w / z /γ）抑制分支比Br（→f f）。在这样做时，我们使用Fierz变换和部分波扩展来研究S波抑制和未抑制的一般条件。 2→2过程的抑制足够严重，即EW和EM Bremsstrahlung可能是仪表 - 单态Majorana DM Annihilation的主导模式。我们结束了这个谈话，讨论了Majorana DM的空间数据呈现的挑战鉴于辐射和Z量磁杆的增强速率及其主导衰变通过特罗隆通道倾向于观察到的辐射率而不是观察到的速度。

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