Non-linear Regge spectrum fits to experimentally up-dated meson states

TL;DR

This paper fits recent experimental meson resonance data using a non-linear Regge trajectory model, successfully describing 23 mesons with high accuracy and revealing Regge-type excitations.

Contribution

It introduces a non-linear model for Regge trajectories that fits updated meson data with only five parameters, including the pion mass.

Findings

Fitted 23 meson states with ~3% accuracy for most

Model describes mesons as Regge-type excitations of the pion

Good fit quality demonstrates model's effectiveness

Abstract

The exciting feature of recent times is the inflow of new experimental data. Fits to the $\pi, \r$ and f meson resonances found by the VES collaboration, along with those of the PDG 1998 compilation are reported using a non-linear model for Regge trajectories. There are only five parameters including the pion mass and the states come out as Regge -type excitations of the pion. Total number of mesons fitted are 23 and the fit is good to $\sim$ 3% for 18 of them and $\sim$ 9% for others.