Large-N-c naturalness in coupled-channel meson-meson scattering
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Large-N-c naturalness in coupled-channel meson-meson scattering

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Large-N-c naturalness in coupled-channel meson-meson scattering

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Ledwig, T.; Nieves Pamplona, Juan Miguel; Pich Zardoya, Antonio Perfil; Ruiz Arriola, Enrique; Ruiz de Elvira, Jacobo
This document is a artículoDate2014

Este documento está disponible también en : http://hdl.handle.net/10550/52964
The analysis of hadronic interactions with effective field theory techniques is complicated by the appearance of a large number of low-energy constants, which are usually fitted to data. On the other hand, the large-Nc limit helps to impose natural short-distance constraints on these low-energy constants, providing a parameter reduction. A Bayesian interpretation of the expected 1/Nc accuracy allows for an easy and efficient implementation of these constraints, using an augmented χ2. We apply this approach to the analysis of meson-meson scattering, in conjunction with chiral perturbation theory to one loop and coupled-channel unitarity, and show that it helps to largely reduce the many existing ambiguities and simultaneously provide an acceptable description of the available phase shifts.

    Ledwig, T. Nieves Pamplona, Juan Miguel Pich Zardoya, Antonio Ruiz Arriola, Enrique Ruiz de Elvira, Jacobo 2014 Large-N-c naturalness in coupled-channel meson-meson scattering Physical Review D 90 11 114020
http://dx.doi.org/10.1103/PhysRevD.90.114020

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