Calculation of regge trajectories of strange resonances and identification of the k-0*(800) as a non-ordinary meson

Rodas Bilbao, Arkaitz2023-06-182023-06-1820161899-235810.5506/APhysPolBSupp.9.453https://hdl.handle.net/20.500.14352/23199© Polska Akademia Nauk, Instytut Fizyki. International Meeting on Excited QCD (eQCD 2016)(2016. Costa da Caparica, Portugal). A.R. is supported by the Spanish Projects No. FPA2011-27853-C02-02 and No. FPA2014- 53375C2-2 and Red de Excelencia de Física Hadrónica FIS2014-57026-REDT.We review how the Regge trajectory of an elastic resonance can be obtained just from its pole position and coupling, using a dispersive formalism. This allows us to deal correctly with the finite widths of resonances in Regge trajectories. In this way, we can calculate the Regge trajectories for the K* (892), K_1(1400) and K_(0)^(*)(1430), obtaining ordinary linear Regge trajectories, expected for qq resonances. In contrast, for the K_(0)^(*)(800) meson, the resulting Regge trajectory is non-linear and with much smaller slope, strongly supporting its non-ordinary nature.spaCalculation of regge trajectories of strange resonances and identification of the k-0*(800) as a non-ordinary mesonjournal articlehttp://dx.doi.org/10.5506/APhysPolBSupp.9.453http://www.actaphys.uj.edu.plopen access51-73PolesFísica-Modelos matemáticosFísica matemática