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We propose a massive Yang-Mills model blessed with both physical unitarityand renormalizability without Higgs particles. This is achieved by a novelnonlinear but local transformation from the original fields in theCurci-Ferrari model to the massive vector field with the spin one, which hasthe correct physical degrees of freedom and invariant under an extended BRSTtransformation. We clarify the reason for failures of the preceding attemptsand check the physical unitarity in perturbation theory.

A unitary and renormalizable model for massive Yang-Mills fields without Higgs fields