Johan Bijinens, Johan Relefors
Chiral Perturbation Theory at Finite Volume and/or with Twisted Boundary Conditions


In this talk we discuss a number of ChPT calculations relevant for lattice QCD. These include the finite volume corrections at two-loop order for masses and decay constants. The second part is about hadronic vacuum polarization where we present the two-loop ChPT estimate for the disconnected and strange quark contributions. We also present the finite volume corrections at two-loop order. The final part is the one-loop finite volume with twisted boundary conditions contribution to f+(q2) and the full Kℓ3 amplitude.

LU TP 16-61