Fernández Ramírez, CésarRelaño, A.2024-12-092024-12-092007-02-08Fernández-Ramírez, & Relaño. (2007). Spectral-fluctuations test of the quark-model baryon spectrum. Physical Review Letters, 98(6). https://doi.org/10.1103/PHYSREVLETT.98.0620011079-7114, 0031-9007https://doi.org/10.1103/PhysRevLett.98.062001https://hdl.handle.net/20.500.14468/24759This is an Accepted Manuscript of an article published by American Physical Society in "Physical Review Letters, 98(6)", available at: https://doi.org/10.1103/PhysRevLett.98.062001Este es el manuscrito aceptado del artículo publicado por American Physical Society en "Physical Review Letters, 98(6)", disponible en línea: https://doi.org/10.1103/PhysRevLett.98.062001We study the low-lying baryon spectrum (up to 2.2 GeV) provided by experiments and different quark models using statistical tools which allow us to postulate the existence of missing levels in spectra. We confirm that the experimental spectrum is compatible with random matrix theory, the paradigmatic model of quantum chaos, and we find that the quark models are more similar to a Poisson distribution, which is not compatible with what should be expected in a correlated spectrum. From our analysis it stems that the spectral fluctuation properties of quark-model spectra are incompatible with experimental data. This result can be used to enlighten the problem of missing resonances.eninfo:eu-repo/semantics/openAccessartículo