Is the spectrum of highly excited mesons purely coulombian?

Abstract

We show that a static central potential may provide a precise description of highly excited light unflavoured mesons. Due to string breaking this potential becomes of chromoelectric type at sufficiently large quark-antiquark distances giving rise to a coulombian spectrum. The same conclusion can be inferred for any other meson sector through a straightforward extension of our analysis.

Comments: 4 pages, accepted for publication in Phys. Rev. Lett