String models and Regge trajectories for baryons

Abstract

The string with massive ends may be considered as the model q-q of a meson or as the quark-diquark model q-qq of a baryon. Rotational states (planar uniform rotations) of this string demonstrate quasilinear dependence between an- gular momentum and square of energy of a state. Such a behavior was used for describing light, strange, charmed, bottom mesons on Regge trajectories. In this paper we choose the quark-diquark string baryon model because of its stability and true Regge slope and use this model with two types of spin-orbit correction for describing N , ∆, Σ, Λ and Λc baryons on Regge trajectories.