Regge Trajectories of Tetraquarks and Pentaquarks with Massive Quarks in the Flux Tube Model

TL;DR

This paper investigates the Regge trajectories of recently observed tetraquarks and pentaquarks using the flux tube model with finite quark masses, analyzing how flux tube length affects their properties and comparing results with experimental data.

Contribution

It introduces a flux tube model approach with finite quark masses to study the Regge trajectories of exotic hadrons, providing new insights into their structural dynamics.

Findings

Flux tube length remains constant at fixed angular momentum.

Results align well with experimental observations.

Proposes additional states consistent with existing data.

Abstract

In recent years, many tetraquarks and pentaquarks have been discovered by various experimental groups and X(3872), Zc(3900), X(4430), P + c (4312), P + c (4457) are some of the interesting observed tetraquark and pentaquark states. The Regge trajectories of some such states are studied in view of the flux tube model of hadrons with finite quark masses. The effect of flux tube (or string) length variation on the Regge trajectories of these sates is analysed in detail. It is observed that for a fixed angular momentum, the string length has a constant value. Some other states are also proposed and the results obtained are then compared with the studies by others. Our findings correspond rather well with those of other researchers and with those of the experiment.