Resonant production refers to the process in which a heavy particle is produced in association with a resonance, which is a short-lived particle that quickly decays into other particles. This process is of interest in particle physics research as it can provide insight into the properties and interactions of these heavy particles. Resonant production often occurs in colliders such as the Large Hadron Collider (LHC) where high-energy collisions can lead to the creation of these particles. Studying resonant production can help researchers better understand the fundamental forces and particles that make up the universe.