Rodas, A.Albadalejo, M.Jackura, A.Fernández Ramírez, CésarMathieu, V.Mikhasenko, M.Nys, J.Pauk, V.Ketzer, B.Szczepaniak, A.P.2024-12-032024-12-032019-01-29Rodas, Pilloni, Albaladejo, Fernández-Ramírez, Jackura, Mathieu, Mikhasenko, Nys, Pauk, Ketzer, & Szczepaniak. (2019). Determination of the Pole Position of the Lightest Hybrid Meson Candidate. Physical Review Letters, 122(4)2002. https://doi.org/10.1103/PHYSREVLETT.122.0420021079-7114, 0031-9007https://doi.org/10.1103/PhysRevLett.122.042002https://hdl.handle.net/20.500.14468/24670The registered version of this article, first published in “Physical Review Letters, 122(4)2002", is available online at the publisher's website: American Physical Society, https://doi.org/10.1103/PhysRevLett.122.042002La versión registrada de este artículo, publicado por primera vez en “Physical Review Letters, 122(4)2002", está disponible en línea en el sitio web del editor: American Physical Society, https://doi.org/10.1103/PhysRevLett.122.042002Mapping states with explicit gluonic degrees of freedom in the light sector is a challenge, and has led to controversies in the past. In particular, the experiments have reported two different hybrid candidates with spin-exotic signature, 𝜋1⁡(1400) and 𝜋1⁡(1600), which couple separately to 𝜂⁢𝜋 and 𝜂′⁢𝜋. This picture is not compatible with recent Lattice QCD estimates for hybrid states, nor with most phenomenological models. We consider the recent partial wave analysis of the 𝜂(′)⁢𝜋 system by the COMPASS Collaboration. We fit the extracted intensities and phases with a coupled-channel amplitude that enforces the unitarity and analyticity of the 𝑆 matrix. We provide a robust extraction of a single exotic 𝜋1 resonant pole, with mass and width 1564 ±24 ±86 and 492 ±54 ±102  MeV, which couples to both 𝜂(′)⁢𝜋 channels. We find no evidence for a second exotic state. We also provide the resonance parameters of the 𝑎2⁡(1320) and 𝑎′ 2⁡(1700).eninfo:eu-repo/semantics/openAccessartículo