The Ademollo-Gatto theorem for lattice semileptonic decays

Abstract

We present the results of the calculation of the Kl3 semileptonic form factor at zero momentum transfer, f(0), obtained at one-loop in partially quenched Chiral Perturbation Theory (with either Nf=2, or Nf=3, and with generic valence and sea quark masses). We show that for Nf=2, when the masses of the valence and sea light quarks are equal, the correction is of the order (MK^2-Mpi^2)^3. The formulae presented here can be useful for the mass extrapolation of the results obtained in lattice simulations to the physical point.

arXiv comment7 pages

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Cited by in corpus (9)

• Review of lattice results concerning low energy particle physics
• K->pi form factors with reduced model dependence
• K -> pion Semileptonic Form Factors from Two-Flavor Lattice QCD
• Vector form factor in K_l3 semileptonic decay with two flavors of dynamical domain-wall quarks
• Kaon semileptonic vector form factor and determination of |V_{us}| using staggered fermions
• Chiral Extrapolation of the Strangeness Changing K pi Form Factor
• Semileptonic Kaon Decay in Staggered Chiral Perturbation Theory
• Progress in kaon physics on the lattice
• Chiral extrapolation of hyperon vector form factors