PublicaciΓ³n: Determination of the Pole Position of the Lightest Hybrid Meson Candidate
Fecha
2019-01-29
Autores
Rodas, A.
Albadalejo, M.
Jackura, A.
FernΓ‘ndez RamΓrez, CΓ©sar
Mathieu, V.
Mikhasenko, M.
Nys, J.
Pauk, V.
Ketzer, B.
Szczepaniak, A.P.
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Derechos de acceso
info:eu-repo/semantics/openAccess
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Editor
American Physical Society
Resumen
Mapping 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, π1β‘(1400) and π1β‘(1600), which couple separately to πβ’π and πβ²β’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 π(β²)β’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 π matrix. We provide a robust extraction of a single exotic π1 resonant pole, with mass and width 1564 Β±24 Β±86 and 492 Β±54 Β±102ββMeV, which couples to both π(β²)β’π channels. We find no evidence for a second exotic state. We also provide the resonance parameters of the π2β‘(1320) and πβ²
2β‘(1700).
DescripciΓ³n
The registered version of this article, first published in βPhysical Review Letters, 122(4)2002", is available online at the publisher's website:
American Physical Society, https://doi.org/10.1103/PhysRevLett.122.042002
La versiΓ³n registrada de este artΓculo, publicado por primera vez en βPhysical Review Letters, 122(4)2002", estΓ‘ disponible en lΓnea en el sitio web del editor: American Physical Society, https://doi.org/10.1103/PhysRevLett.122.042002
La versiΓ³n registrada de este artΓculo, publicado por primera vez en βPhysical Review Letters, 122(4)2002", estΓ‘ disponible en lΓnea en el sitio web del editor: American Physical Society, https://doi.org/10.1103/PhysRevLett.122.042002
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Palabras clave
CitaciΓ³n
Rodas, Pilloni, Albaladejo, FernΓ‘ndez-RamΓrez, 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.122.042002
Centro
Facultades y escuelas::Facultad de Ciencias
Departamento
FΓsica Interdisciplinar