(1-DIMENSIONAL LARGE-N QCD COUPLED TO ADJOINT FERMIONS(1))

Citation
G. Bhanot et al., (1-DIMENSIONAL LARGE-N QCD COUPLED TO ADJOINT FERMIONS(1)), Physical review. D. Particles and fields, 48(10), 1993, pp. 4980-4990
Citations number
29
Categorie Soggetti
Physics, Particles & Fields
ISSN journal
05562821
Volume
48
Issue
10
Year of publication
1993
Pages
4980 - 4990
Database
ISI
SICI code
0556-2821(1993)48:10<4980:(LQCTA>2.0.ZU;2-5
Abstract
We consider (1 + 1)-dimensional QCD coupled to Majorana fermions in th e adjoint representation of the gauge group SU(N). Pair creation of pa rtons (fermion quanta) is not suppressed in the large-N limit, where t he glueball-like bound states become free. In this limit the spectrum is given by a linear light-cone Schrodinger equation, which we study n umerically using the discretized light-cone quantization. We find a di screte spectrum of bound states, with the logarithm of the level densi ty growing approximately linearly with the mass. The wave function of a typical excited state is a complicated mixture of components with di fferent parton numbers. A few low-lying states, however, are surprisin gly close to being eigenstates of the parton number, and their masses can be accurately calculated by truncated diagonalizations.