Abstract
We argue that the large-Nc expansion of QCD can be used to treat a Lagrangian of resonances in a perturbative way. As an illustration of this we compute the L10 coupling of the chiral Lagrangian by integrating out resonance fields at one loop. Given a Lagrangian and a renormalization scheme, this is how in principle one can answer in a concrete and unambiguous manner questions such as at what scale resonance saturation takes place.
Original language | English |
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Article number | 056014 |
Pages (from-to) | 560141-560146 |
Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
Volume | 65 |
Issue number | 5 |
Publication status | Published - 1 Mar 2002 |