The sensitivity of the rare decays η/η'→π0γγ to signatures of Beyond the Standard particles in the MeV-GeV mass range will be analyzed in this work. By adding new fundamental scalar (S) and vector (V) bosons through the decay channels η/η'→π0S→π0γγ and η/η'→Vγ→π0γγ, respectively, to the Standard Model contributions from vector, tensor and scalar meson exchanges, and employing experimental data for the associated branching ratios, this project will set constraints on the new particle fundamental properties -mass and coupling to the Standard Model particles. The results will be relevant for the dark-sector particles search programs at existing and forthcoming light-meson factories, such as BESIII (China) and Jefferson Lab Eta Factory (USA) experiments
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The work will require state-of-the-art reading, as well as analytical and computational skills. It will be developed at the University of Barcelona, but remote supervision is possible.