m[sub π] and N[sub c] dependence of ρ and σ mesons from unitarized chiral perturbation theory | Zendy

G. Ríos | Zendy; C. Hanhart | Zendy; J. R. Peláez | Zendy

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m[sub π] and N[sub c] dependence of ρ and σ mesons from unitarized chiral perturbation theory

Author(s) -

G. Ríos,

C. Hanhart,

J. R. Peláez

Publication year - 2011

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.3575125

Subject(s) - physics , extrapolation , chiral perturbation theory , meson , amplitude , inverse , lattice (music) , unitarity , perturbation theory (quantum mechanics) , coupling (piping) , pion , particle physics , quantum electrodynamics , quantum mechanics , mathematics , mathematical analysis , mechanical engineering , geometry , acoustics , engineering

We review the N_c and m_π dependence of the rho(770) and σ (or f_0(600) resonances generated with the Inverse Amplitude Method. The σ N_c behavior is at odds with being dominantly a q̅q̅ state, but there is a hint of a subdominant q̅q̅o component with a mass above 1 GeV. We find fair agreement with lattice results for the chiral extrapolation of the ρ mass, and that the ρ π π coupling is almost m_π independent whereas the σ π π depends strongly on m_π

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