Large-N Structure of Tetraquark Mesons

Abstract

Following Weinberg's argument that narrow tetraquark mesons are not precluded in large N_c QCD, we explore the flow of N_c factors needed for the consistency of this picture, and show that they must arise in a novel way, not simply through the usual combinatoric counting.

Comments: 5 pages, revtex. Clarifications added to improve presentation. Version accepted for publication in PRD