Topological susceptibility in the SU(3) gauge theory

Luigi Del Debbio, Leonardo Giusti, Claudio Pica

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Abstrakt

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_0^4 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'.
OriginalsprogEngelsk
TidsskriftPhysical Review Letters
Vol/bind94
Udgave nummer3
Sider (fra-til)032003
Antal sider4
ISSN0031-9007
DOI
StatusUdgivet - 2004

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