Topological susceptibility in SU(3) gauge theory.

  title={Topological susceptibility in SU(3) gauge theory.},
  author={Luigi Del Debbio and Leonardo Giusti and Claudio Pica},
  journal={Physical review letters},
  volume={94 3},
We compute the topological susceptibility for the SU(3) Yang-Mills theory by employing the expression of the topological charge density operator suggested by Neuberger's fermions. In the continuum limit we find r(4)(0)chi = 0.059(3), which corresponds to chi = (191 +/- 5 MeV)(4) if F(K) is used to set the scale. Our result supports the Witten-Veneziano explanation for the large mass of the eta('). 

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