Massless QCD_2 From Current Constituents

TL;DR

This paper analyzes the spectra of multi-flavor massless QCD_2 using a current-based approximation, deriving a 't Hooft-like equation and validating results against DLCQ data, while also re-deriving known spectra in specific limits.

Contribution

It introduces a current-based approximation method for analyzing massless QCD_2 spectra and derives a 't Hooft-like equation, providing new insights and validation against existing results.

Findings

Excellent agreement with DLCQ results for the lowest massive state

Derivation of 't Hooft and large N_f limit spectra using currents

Introduction of a current truncation approximation for QCD_2

Abstract

We discuss the spectra of multi-flavor massless QCD_2. An approximation in which the Hilbert space is truncated to two currents states is used. We write down a 't Hooft like equation for the wave function of the two currents states. We solve this equation for the lowest massive state and find an excellent agreement with the DLCQ results. In addition, the 't Hooft model and the large N_f limit spectra are re-derived by using a description in terms of currents.