Static potential in scalar QED(3) with non-minimal coupling
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/09/2006
|
Resumo |
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. |
Formato |
11091-11099 |
Identificador |
http://dx.doi.org/10.1088/0305-4470/39/35/010 Journal of Physics A-mathematical and General. Bristol: Iop Publishing Ltd, v. 39, n. 35, p. 11091-11099, 2006. 0305-4470 http://hdl.handle.net/11449/34024 10.1088/0305-4470/39/35/010 WOS:000239933300011 |
Idioma(s) |
eng |
Publicador |
Iop Publishing Ltd |
Relação |
Journal of Physics A: Mathematical and General |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |