Journal
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS
Volume 119, Issue -, Pages 894-899Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0920-5632(03)01713-4
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We study the effect of adding a matter field to the Z(2) gauge model in three dimensions at zero and finite temperature. Up to a given value of the parameter regulating the coupling, the matter field produces a slight shift of the transition line without changing the universality class of the pure gauge theory, as seen by finite size scaling analysis or by comparison, in the finite temperature case, to exact formulas of conformal field theory. At zero temperature the critical line turns into a first-order transition. The fate of this kind of transition in the finite temperature case is discussed.
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