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hep-ph2009★ 2 cited
Contribution from Duality Violations to the theoretical error on alpha_s
O. Cata, M. Golterman, S. Peris
Duality Violations (DVs) is a nickname for the failure of the Operator Product Expansion to describe QCD correlators on the physical axis. Using a physically motivated ansatz, a fi…
hep-ph2005
Duality violations and spectral sum rules
O. Cata, M. Golterman, S. Peris
We study the issue of duality violations in the VV-AA vacuum polarization function in the chiral limit. This is done with the help of a model with an expansion in inverse powers of…
hep-ph2003
Long-distance dimension-eight operators in B_K
O. Cata, S. Peris
Besides their appearance at short distances \gtrsim 1/M_W, local dimension-eight operators also contribute to kaon matrix elements at long distances of order \gtrsim 1/mu_ope, wher…