Status and Prospects of the χc1(3872) Study at BESIII

The χc1(3872) plays a pivotal role in understanding hadronic structures, remaining one of the most extensively studied exotic particles among numerous observed unconventional hadronic states. Sustained experimental and theoretical investigations into the particle over the past two decades have propelled its study into a high-precision regime, marked by refined measurements of its decay dynamics and line shape, thereby offering critical insights for resolving longstanding debates between molecular, tetraquark, hybrid, and charmonium interpretations of this particle. Furthermore, the heavy-quark symmetry in the molecular picture predicts a series of χc1(3872) partners. The BESIII experiment has made seminal contributions to the study of the χc1(3872), leveraging its unique capabilities in high-statistics data acquisition and low-background condition, such as observations of the productions e+e−→γχc1(3872) and ωχc1(3872) and investigations of its decays. This article gives a concise review and prospects of the study of the χc1(3872) from the BESIII experiment.