Artículos de revistas
Static potential in scalar QED(3) with non-minimal coupling
Fecha
2006-09-01Registro en:
Journal of Physics A-mathematical and General. Bristol: Iop Publishing Ltd, v. 39, n. 35, p. 11091-11099, 2006.
0305-4470
10.1088/0305-4470/39/35/010
WOS:000239933300011
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
Here we compute the static potential in scalar QED(3) at leading order in 1/Nf. We show that the addition of a non-minimal coupling of Pauli-type (is an element of(mu nu alpha)j(mu)partial derivative(nu)A(alpha)), although it breaks parity, it does not change the analytic structure of the photon propagator and consequently the static potential remains logarithmic ( confining) at large distances. The non-minimal coupling modifies the potential, however, at small charge separations giving rise to a repulsive force of short range between opposite sign charges, which is relevant for the existence of bound states. This effect is in agreement with a previous calculation based on Moller scattering, but differently from such calculation we show here that the repulsion appears independently of the presence of a tree level Chern-Simons term which rather affects the large distance behaviour of the potential turning it into a constant.