Lattice Results for Low Moments of Light Meson Distribution Amplitudes

Abstract

As part of the UKQCD and RBC collaborations' N_f=2+1 domain-wall fermion phenomenology programme, we calculate the first two moments of the light-cone distribution amplitudes of the pseudoscalar mesons pion and kaon and the (longitudinally-polarised) vector mesons rho, K-star and phi. We obtain the desired quantities with good precision and are able to discern the expected quark-mass dependence of SU(3)-flavour breaking effects. An important ingredient of the calculation is the nonperturbative renormalisation of lattice operators using the RI'/MOM technique.

21 pages, 9 figures

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• Moments of pseudoscalar meson distribution amplitudes from the lattice
• Non-perturbative renormalization of quark bilinear operators and B_K using domain wall fermions
• On the reduction of hypercubic lattice artifacts
• A Lattice Computation of the First Moment of the Kaon's Distribution Amplitude
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