Screening in three-dimensional QED with arbitrary fermion mass
1 Instituto de Física-USP, C.P.66318, 05315-970 S. Paulo, Brazil
2 S.N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake City, Calcutta 700.091, India
Received: 16 May 2000 / Published online: 25 September 2000 - © Springer-Verlag 2000
We compute the quark-antiquark potential in three-dimensional massive quantum electrodynamics for an arbitrary fermion mass. The result indicates that screening prevails for any quark masses, contrary to the classical expectations, generalizing our previous result obtained for large masses. We also test the validity of several approximation schemes using a detailed numerical analysis. The classical result is still reproduced for a small separation of the quarks.
Copyright Società Italiana di Fisica, Springer-Verlag 2000