Contribution of the Sixth Order Effective Chiral Lagrangian to the $π K$ Scattering at Large $N_c$

Details Contribution of the Sixth Order Effective Chiral Lagrangian to the $π K$ Scattering at Large $N_c$ Contribution of the Sixth Order Effective Chiral Lagrangian to the $π K$ Scattering at Large $N_c$

1995-03-24

arxiv.org/abs/hep-ph/9503424v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

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Scientific paper

Using the method of asymptotic sum rules we estimated the size of $O(m_s p_\pi^4)$ and $O(m_s^2 p_\pi^2)$ corrections to $\pi K$ scattering amplitude in large $N_c$ limit. These corrections arise from the sixth order effective chiral lagrangian (EChL). Our method enables us to estimate the corresponding terms of the sixth order EChL in leading order of $1/N_c$ expansion in model independent way. We found that the corrections numerically are suppressed in spite of naive expectation of 30--35\%. Our estimation gives the value of these corrections about 5--10\% .

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