On the large-$N_c$ behavior of the $L_7$ coupling in $χ$PT

Details On the large-$N_c$ behavior of the $L_7$ coupling in $χ$PT On the large-$N_c$ behavior of the $L_7$ coupling in $χ$PT

1994-12-21

arxiv.org/abs/hep-ph/9412343v1

Phys.Lett. B348 (1995) 539-542

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, latex(includes macro at the beginning of file), no figures

Scientific paper

10.1016/0370-2693(95)00160-M

It is shown that the usual large-$N_c$ counting of the coupling constant
$L_{7}$ of the ${\cal O}(p^4)$ low-energy chiral $SU(3)$ Lagrangian \cite{GL85}
is in conflict with general properties of QCD in the large-$N_c$ limit. The
solution of this conflict within the framework of a chiral $U(3)$ Lagrangian is
explained.

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