Heavy meson semileptonic decays in two dimensions in the large Nc

Details Heavy meson semileptonic decays in two dimensions in the large Nc Heavy meson semileptonic decays in two dimensions in the large Nc

2006-12-11

arxiv.org/abs/hep-ph/0612121v1

Nucl.Phys.Proc.Suppl.174:181-184,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given at the High-Energy Physics International Conference on Quantum Chromodynamics, 3-7 July (2006), Montpellier (France

Scientific paper

10.1016/j.nuclphysbps.2007.08.12

We study QCD in 1+1 dimensions in the large Nc limit using light-front Hamiltonian perturbation theory in the 1/Nc expansion. We use this formalism to exactly compute hadronic transition matrix elements for arbitrary currents at leading order in 1/Nc, which we use to write the semileptonic differential decay rate of a heavy meson and its moments. We then compare with the results obtained using an effective field theory approach based on perturbative factorization, with the intention of better understanding quark-hadron duality. A very good numerical agreement is obtained between the exact result and the result using effective theories.

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