Probing MeV to 90 GeV axion-like particles with LEP and LHC
Probing MeV to 90 GeV axion-like particles with LEP and LHC
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DOI：
10.1016/j.physletb.2015.12.037
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发表时间：
2015-09
影响因子：
4.4
通讯作者：
J. Jaeckel;M. Spannowsky
中科院分区：
文献类型：
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作者：
J. Jaeckel;M. Spannowsky
摘要轴子类粒子(ALP)是一种相对较轻的(伪)标量，它耦合到两个规范玻色子，是标准模型许多扩展的共同特征。到目前为止，对这种粒子的灵敏度在MeV到10GeV范围内存在差距。在这篇笔记中，我们展示了Z→γγ衰变上的LEP数据在这个范围内(实际上直到Z质量)提供了显著的约束。我们还讨论了大型强子对撞机和未来对撞机的敏感性。特别值得一提的是，大型强子对撞机在p p→3γ和m 3γ≈m Z通道中搜索4 GeV m a GeV的伪标量时表现出了良好的灵敏度。
Abstract Axion-like particles (ALPs), relatively light (pseudo-) scalars coupled to two gauge bosons, are a common feature of many extensions of the Standard Model. Up to now there has been a gap in the sensitivity to such particles in the MeV to 10 GeV range. In this note we show that LEP data on Z→ γ γ decays provides significant constraints in this range (and indeed up to the Z-mass). We also discuss the sensitivities of LHC and future colliders. Particularly the LHC shows promising sensitivity in searching for a pseudo-scalar with 4≲ m a≲ 60 GeV in the channel p p→ 3 γ with m 3 γ≈ m Z.