Calculation of Regge trajectories of strange resonances and identification of the K0*(800) as a non-ordinary meson

2016/07/13 by Peláez, J. R., Rodas, A.
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.1607.03750

Abstract

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), K₁(1400) and K^*₀(1430), obtaining ordinary linear Regge trajectories, expected for q q 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.

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