Diphoton Signatures from Heavy Axion Decays at the CERN Large Hadron Collider
Diphoton Signatures from Heavy Axion Decays at the CERN Large Hadron Collider
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DOI：
10.1103/physrevd.93.015017
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发表时间：
2015-12
影响因子：
5
通讯作者：
A. Pilaftsis
中科院分区：
文献类型：
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作者：
A. Pilaftsis
在分析了在p S=13TeV的质心能量处收集到的新数据后。在最小UV完全模型的框架内，我们提出了一种可能的物理解释，该模型具有一个大质量的单态赝标量态a，它耦合到一个新的TeV尺度的有色矢量型费米子F，它的超电荷量子数是一个非零整数。伪标量态a可能是一个重的伪Goldstone玻色子，例如一个重的轴子，它衰变成两个光子，其质量位于超额区周围。Cp奇态a的质量及其与F的耦合可能是非微扰效应所致，非微扰效应可以动态地破坏原Goldstone移位对称性。本文简要讨论了重轴子a在秋千马约拉纳尺度的辐射产生和解决所谓的强CP问题中可能起的作用。
after analyzing new data collected at centre-of-mass energies of p s = 13 TeV. We present a possible physical interpretation of such a signature, within the framework of a minimal UV-complete model with a massive singlet pseudo-scalar state a that couples to a new TeV-scale coloured vector-like fermion F, whose hypercharge quantum number is a non-zero integer. The pseudo-scalar state a might be a heavy pseudo-Goldstone boson, such as a heavy axion, which decays into two photons and whose mass lies around the excess region. The mass of the CP-odd state a and its coupling to F may be due to non-perturbative effects, which can break the original Goldstone shift symmetry dynamically. The possible role that the heavy axion a can play in the radiative generation of a seesaw Majorana scale and in the solution to the so-called strong CP problem is briefly discussed.