https://doi.org/10.1051/epjconf/202227406007
Two-photon decay of fully-charmed tetraquarks from light-by-light scattering at the LHC
1 Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, D-55128 Mainz, Germany
2 Rudolf Peierls Centre, Beecroft Building, Parks Road, Oxford, OX1 3PU, United Kingdom
3 LPNHE, Sorbonne Université, Université Paris Cité, CNRS/IN2P3, Paris, France, 75252
4 Institut für Physik, Johannes Gutenberg-Universität Mainz, D-55128 Mainz, Germany
* e-mail: vbiloshy@uni-mainz.de
Published online: 22 December 2022
The LHC newly-discovered resonant structures around 7 GeV, such as the X(6900), could be responsible for the observed excess in light-by-light scattering between 5 and 10 GeV. We show that the ATLAS data for light-bylight scattering may indeed be explained by such a state with the γγ branching ratio of order of 10−4. This is much larger than the value inferred by the vectormeson dominance, but agrees quite well with the tetraquark expectation for the nature of this state. Further light-by-light scattering data in this region, obtained during the ongoing Run-3 and future Run-4 of the LHC, are required to pin down these states in γγ channel.
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
