Work

Status and Perspectives of the X(1750)

Year: 2025

Type: article

Abstract: 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.

Source: Symmetry

DOI: 10.3390/sym17122062

Authors: Hongwei Wen, Zhen Hu, Jingqing Zhang

Institutions: Tsinghua University, Nanjing Normal University

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,896

Funders: National Natural Science Foundation of China, Tsinghua University