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Two different models exhibiting self-organized criticality are analyzed bymeans of the dynamic renormalization group. Although the two models differ bytheir behavior under a parity transformation of the order parameter, it isshown that they both belong to the same universality class, in agreement withcomputer simulations. The asymptotic values of the critical exponents areestimated up to one loop order from a systematic expansion of a nonlinearequation in the number of coupling constants.Comment: 8 pages, RevTeX 3.0, 1 PostScript figure available upon reques

Dynamic Renormalization Group Approach to Self-Organized Critical Phenomena