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arXiv · 1903.04151

Extending the constraint for axion-like particles as resonances at the LHC and laser beam experiments

C. Baldenegro·S. Hassani·C. Royon·L. Schoeffel
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Abstract

We study the discovery potential of axion-like particles (ALP), pseudo-scalars weakly coupled to Standard Model fields, at the Large Hadron Collider (LHC). Our focus is on ALPs coupled to the electromagnetic field, which would induce anomalous scattering of light-by-light. This can be directly probed in central exclusive production of photon pairs in ultra-peripheral collisions at the LHC in proton and heavy ion collisions. We consider non-standard collision modes of the LHC, such as argon-argon collisions at $\sqrt{s_{NN}} = 7$ TeV and proton-lead collisions at $\sqrt{s_{NN}} = 8.16$ TeV to access regions in the parameter space complementary to the ones previously considered for lead-lead or proton-proton collisions. In addition, we show that, using laser beam interactions, we can constrain ALPs as resonant deviations in the refractive index, induced by anomalous light-by-light scattering effects. If we combine the aforementioned approaches, ALPs can be probed in a wide range of masses from the eV scale up to the TeV scale.

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C. Baldenegro, S. Hassani, C. Royon, L. Schoeffel. 2019-03-11. Extending the constraint for axion-like particles as resonances at the LHC and laser beam experiments. https://doi.org/10.1016/j.physletb.2019.06.029

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