TY  - JOUR
AU  - Garcia-Recio, C.
AU  - Geng, L. S.
AU  - Nieves, J.
AU  - Salcedo, L. L.
AU  - Wang, E.
AU  - Xie, J. J.
PY  - 2013
DA  - 2013//
TI  - Low-lying even parity meson resonances and spin-flavor symmetry revisited
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 096006
EP  - 18pp
VL  - 87
IS  - 9
PB  - Amer Physical Soc
AB  - We review and extend the model derived in Garcia-Recio et al. [Phys. Rev. D 83, 016007 (2011)] to address the dynamics of the low-lying even-parity meson resonances. This model is based on a coupled-channels spin-flavor extension of the chiralWeinberg-Tomozawa Lagrangian. This interaction is then used to study the S-wave meson-meson scattering involving members not only of the pi octet, but also of the rho nonet. In this work, we study in detail the structure of the SU(6)-symmetry-breaking contact terms that respect (or softly break) chiral symmetry. We derive the most general local (without involving derivatives) terms consistent with the chiral-symmetry-breaking pattern of QCD. After introducing sensible simplifications to reduce the large number of possible operators, we carry out a phenomenological discussion of the effects of these terms. We show how the inclusion of these pieces leads to an improvement of the description of the J(P) = 2(+) sector, without spoiling the main features of the predictions obtained in the original model in the JP = 0(+) and J(P) = 1(+) sectors. In particular, we find a significantly better description of the I-G(J(PC)) =0(+)(2(++)), 1(-)(2(++)) and the I(JP)=1/2(2(+)) sectors, which correspond to the f(2)(1270), a(2)(1320), and K-2(*)(1430) quantum numbers, respectively.
SN  - 1550-7998
UR  - http://arxiv.org/abs/1304.1021
UR  - https://doi.org/10.1103/PhysRevD.87.096006
DO  - 10.1103/PhysRevD.87.096006
LA  - English
N1  - WOS:000319059500004
ID  - Garcia-Recio_etal2013
ER  -