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arXiv · 2501.06034

The all-charm tetraquark and its contribution to two-photon processes

Panagiotis Kalamidas·Marc Vanderhaeghen
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Abstract

Prompted by several potential tetraquark states that have been reported by the LHCb, CMS and ATLAS collaborations in the di-$J/\Psi$ and $J/\Psi \Psi(2S)$ spectra, we investigate their contribution to two-photon processes. Within a non-relativistic potential model for the all-charm tetraquark states, we calculate the two-photon decay widths of these states, and test model independent sum rule predictions. Imposing such sum rule constraints allows us to predict the light-by-light scattering cross sections in a consistent way and check if any excess, in comparison to the Standard Model prediction, as reported by ongoing ATLAS experiments can be attributed to intermediate exotic states.

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Panagiotis Kalamidas, Marc Vanderhaeghen. 2025-01-10. The all-charm tetraquark and its contribution to two-photon processes. https://arxiv.org/abs/2501.06034

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