期刊
PHYSICAL REVIEW LETTERS
卷 124, 期 22, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.124.221801
关键词
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资金
- NSF [PHY-1607611, PHY-1620074, PHY-1914480, PHY-1914731, PHY-174958]
- Maryland Center for Fundamental Physics (MCFP)
The QCD axion provides an elegant solution to the strong CP problem. While the minimal realization is vulnerable to the so-called axion quality problem, we will consider a more robust realization in the presence of a mirror sector related to the standard model by a (softly broken) Z(2) symmetry. We point out that the resulting heavy axion, while satisfying all theoretical and observational constraints, has a large and uncharted parameter space, which allows it to be probed at the LHC as a long-lived particle (LLP). The small defining axionic coupling to gluons results in a challenging hadronic decay signal which we argue can be distinguished against the background in such a long-lived regime, and yet, the same coupling allows for sufficient production at the hadron colliders thanks to the large gluon-parton luminosity. Our study opens up a new window towards accelerator observable axions and, more generally, singly produced LLPs.
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