Diego Guadagnoli

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We apply twisted boundary conditions to lattice QCD simulations of three-point correlation functions in order to access spatial components of hadronic momenta different from the integer multiples of 2π/L. We calculate the vector and scalar form factors relevant to the K → π semileptonic decay and consider all the possible ways of twisting one of the quark(More)
The LHCb Collaboration's measurement of R_{K}=B(B^{+}→K^{+}μ^{+}μ^{-})/B(B^{+}→K^{+}e^{+}e^{-}) lies 2.6σ below the Standard Model prediction. Several groups suggest this deficit to result from new lepton nonuniversal interactions of muons. But nonuniversal leptonic interactions imply lepton flavor violation in B decays at rates much larger than are(More)
We present a strategy for a lattice evaluation of the neutron electric dipole moment induced by the strong CP violating term of the QCD Lagrangian. Our strategy is based on the standard definition of the electric dipole moment, involving the charge density operator J 0 , in case of three flavors with non-degenerate masses. We present a complete diagrammatic(More)
We present the first quenched lattice QCD study of the form factors relevant for the hyperon semileptonic decay Σ − → n ℓ ν. The momentum dependence of both axial and vector form factors is investigated and the values of all the form factors at zero-momentum transfer are presented. Following the same strategy already applied to the decay K 0 → π − ℓ ν, the(More)
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