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arXiv 1603.03421hep-phhep-ex
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表征750 GeV双光子过剩

Characterising the 750 GeV diphoton excess

Jérémy Bernon, Andreas Goudelis, Sabine Kraml, Kentarou Mawatari, Dipan Sengupta

摘要:

我们研究的运动学分布,可能有助于解释最近观察到的过剩的双光子事件在750 GeV的大型强子对撞机运行2。考虑了几种情况,包括自旋0和自旋2 750 GeV的共振,直接衰变成光子对,以及较重的父共振,经历三体或级联衰变。我们发现双光子系统和主导光子的分布组合可以区分不同场景的拓扑结构和质量谱,而QCD辐射模式可以帮助区分产生机制。此外,如果它们(有效地)涉及不可见的粒子,那么丢失的能量是重父场景的一个强大的障碍。虽然我们的研究集中在750 GeV的电流过剩,分析是一般性的,也可以用于表征其他潜在的双光子信号在未来。

英文摘要:

We study kinematic distributions that may help characterise the recently observed excess in diphoton events at 750 GeV at the LHC Run 2. Several scenarios are considered, including spin-0 and spin-2 750 GeV resonances that decay directly into photon pairs as well as heavier parent resonances that undergo three-body or cascade decays. We find that combinations of the distributions of the diphoton system and the leading photon can distinguish the topology and mass spectra of the different scenarios, while patterns of QCD radiation can help differentiate the production mechanisms. Moreover, missing energy is a powerful discriminator for the heavy parent scenarios if they involve (effectively) invisible particles. While our study concentrates on the current excess at 750 GeV, the analysis is general and can also be useful for characterising other potential diphoton signals in the future.

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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