Manifestly Gauge Invariant QCD
نویسندگان
چکیده
Building on recent work in SU(N) Yang-Mills theory, we construct a manifestly gauge invariant exact renormalization group for QCD. A gauge invariant cutoff is constructed by embedding the physical gauge theory in a spontaneously broken SU(N |N) gauge theory, regularized by covariant higher derivatives. Intriguingly, the construction is most efficient if the number of flavours is a multiple of the number of colours. The formalism is illustrated with a very compact calculation of the one-loop β function, achieving a manifestly universal result and without fixing the gauge. SHEP 06-20 PACS numbers: 11.15.Tk, 11.10.Hi, 12.38.-t Manifestly Gauge Invariant QCD 2
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