K+ β Ο+Ο0 decays at next-to-leading orde
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C.-J.D. Lin; G. Martinelli; E. Pallante; C.T. Sachrajda; G. Villadoro
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Article
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2003
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Elsevier Science
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English
β 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