RT Journal Article
T1 Nature of light scalar mesons from their large N_c behavior
A1 Peláez Sagredo, José Ramón
AB We show how to obtain information about the states of an effective field theory in terms of the underlying fundamental theory. In particular, we analyze the spectroscopic nature of meson resonances from the meson-meson scattering amplitudes of the QCD low energy effective theory, combined with the expansion in the large number of colors. The vectors follow a q̅q  behavior, whereas the, σ,ĸ, and f_0 (980) scalars disappear fo large N_c, in support of a q̅ q̅ qq -like nature. The a_0 shows a similar pattern, but the uncertainties are large enough to accommodate both interpretations.
PB American Physical Society
SN 0031-9007
YR 2004
FD 2004-03-12
LK https://hdl.handle.net/20.500.14352/51735
UL https://hdl.handle.net/20.500.14352/51735
LA eng
NO ©2004 The American Physical Society.his work was supported in part by funds provided by the Spanish DGI with Grant Nos. BFM2002-03218, BFM2000-1326 and BFM2002-01003; CICYT Grant No. FPA2000-0956; Junta de Andalucía Grant No. FQM-225 and EURIDICE with contract number HPRN-CT-2002-00311.
NO Spanish DGI
NO CICYT, Spain
NO Junta de Andalucía
NO EU EURIDICE network
DS Docta Complutense
RD 5 jul 2025