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Critical behavior of a general<i>O</i>(<i>n</i>)-symmetric model of two<i>n</i>-vector fields in<i>D</i>= 4 − 2ϵ
The critical behavior of the O(n)-symmetric model with two n-vector fields is studied within the field-theoretical renormalization group approach in a D = 4 − 2 expansion. Depending on the coupling constants, the β-functions, fixed points and critical exponents are calculated up to the one- and two-loop order, respectively (η …