LHCb investigates the rare Σ+→pμ+μ- decay

The LHCb collaboration reported the observation of the hyperon Σ+→pμ+μ- rare decay at the XV International Conference on Beauty, Charm, Hyperons in Hadronic Interactions (BEACH 2024) in Charleston, South Carolina, U.S. A hyperon is a particle containing three quarks, like the proton and neutron, including one or more strange quarks.