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arXiv 1603.07263hep-ph
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来自亮暗扇区的重赝标的大环耦合增强

Large loop-coupling enhancement of a heavy pseudoscalar from a light dark sector

Stefano Di Chiara, Andi Hektor, Kristjan Kannike, Luca Marzola, Martti Raidal

摘要:

由于双光子通道的本底小和对带电粒子的灵敏度高,使得双光子通道成为新物理模型的一个特殊的实验检验。我们提出了一个简单的原型方案,产生一个尖锐的双光子共振作为阈值增强的结果之间的有效耦合的重赝标粒子和新的矢量轻子。因此,我们在2~ $σ$水平上研究了三种不同的情况,这些情况与目前的实验限制一致,并偏离了标准模型。该模型还引入了一个自然的暗物质候选者,能够匹配观测到的暗物质丰度,并舒适地尊重当前的直接检测约束。

英文摘要:

The small background and the sensitivity to charged particles via a leading order loop coupling make the diphoton channel a privileged experimental test for new physics models. We propose a simple archetypal scenario to generate a sharp di-photon resonance as a result of threshold enhancements in the effective coupling between a heavy pseudoscalar particle and new vector-like leptons. We therefore study three different scenarios consistent with the current experimental limits and deviating from the Standard Model at the 2~$σ$ level. The model also introduces a natural dark matter candidate able to match the observed dark matter abundance and comfortably respect the current direct detection constraints.

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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