Status and Perspectives of the X(1750)

Light mesons serve as a cornerstone in probing symmetry realizations and dynamical breaking mechanisms in the non-perturbative regime of the strong interaction. Among them, a notable case is the X(1750), a 1−− state observed in the K+K− invariant mass spectrum. It was initially identified as the ϕ(1680), but subsequent studies by the FOCUS and BESIII collaborations have unambiguously established it as a distinct new state. FOCUS further showed that interference models cannot reproduce a ϕ(1680)-like mass value in its high-statistics data. The absence of the X(1750) in both ss¯ and nn¯ theoretical spectroscopy renders its internal structure an open and compelling question. This work reviews observations of the X(1750), discusses its possible interpretations, and outlines future prospects for its study, particularly regarding the BESIII experiment.