K → ππ matrix elements beyond the leading-order chiral expansion

K+ → π+π0 decays at next-to-leading orde

K+ → π+π0 decays at next-to-leading order in the chiral expansion on finite volumes

✍ C.-J.D. Lin; G. Martinelli; E. Pallante; C.T. Sachrajda; G. Villadoro 📂 Article 📅 2003 🏛 Elsevier Science 🌐 English ⚖ 115 KB

We present the ingredients for determining Kf --t 7r+7r" matrix elements via the combination of lattice QCD and chiral perturbation theory (xPT). By simulating these matrix elements at unphysical kinematics, it is possible to determine all the low-energy constants (LECs) for constructing the physica