Temperature dependent coupling constant in the vector N-component ((lambda)(phi)(sup 4))(sub D) model

摘要

For the massive ((lambda)(phi)4)(sub D) vector N component model, in the large N limit we check that there is no first order phase transition induced by the thermal renormalization coupling constant whatever is the dimension D. moreover for D= 3 we are able to give an exact formula for the temperature behavior of the coupling constant. (author). 11 refs., 2 figs.