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m_π and N_c dependence of rho and σ mesons from unitarized chiral perturbation theory

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Rios, G. and Hanhart, Christoph and Peláez Sagredo, José Ramón (2011) m_π and N_c dependence of rho and σ mesons from unitarized chiral perturbation theory. In IX International Conference on Quark Confinement and the Hadron Spectrum (QCHS IX). AIP Conference Proceedings (1343). American Institute of Physics. ISBN 978-0-7354-0899-9

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Official URL: http://dx.doi.org/10.1063/1.3575125


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Abstract

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.


Item Type:Book Section
Additional Information:

ISSN: 0094-243X
©2011 American Institute of Physics 978-0-7354-0899-9.
International Conference on Quark Confinement and the Hadron Spectrum (9. 2010. Madrid).

Uncontrolled Keywords:Scalar mesons; Chiral Lagrangian, 1/Nc expansion
Subjects:Sciences > Physics > Physics-Mathematical models
Sciences > Physics > Mathematical physics
ID Code:35024
Deposited On:20 Jan 2016 17:11
Last Modified:10 Dec 2018 15:09

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