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Connected, disconnected and strange quark contributions to HVP
2016
Journal of High Energy Physics
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We calculate all neutral vector two-point functions in Chiral Perturbation Theory (ChPT) to two-loop order and use these to estimate the ratio of disconnected to connected contributions as well as contributions involving the strange quark. We extend the ratio of -1/10 derived earlier in two flavour ChPT at one-loop order to a large part of the higher order contributions and discuss corrections to it. Our final estimate of the ratio disconnected to connected is negative and a few
doi:10.1007/jhep11(2016)086
fatcat:jgbicb4cbfhixjhb2c2pum6fim