2 Application of the Large – N c limit to a Chiral Lagrangian with Resonances ∗

نویسنده

  • Oscar Catà
چکیده

It is shown that the implementation of the Large–Nc approximation helps to get insight into the structure of, in principle, any QCD-like theory. As an example, we will compute the NLO corrections to L10 in the chiral limit with a Lagrangian with Resonances.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

ar X iv : h ep - p h / 05 01 22 4 v 1 2 5 Ja n 20 05 1 Baryon resonances from chiral coupled - channel dynamics

We discuss the formation of sand d-wave baryon resonances as predicted by the chiral SU(3) symmetry of QCD. Based on the leading order term of the chiral Lagrangian a rich spectrum of molecules is generated, owing to final-state interactions. The spectrum of sand d-wave baryon states with zero and non-zero charm is remarkably consistent with the empirical pattern. In particular, the recently an...

متن کامل

Covariant meson - baryon scattering with chiral and large N c constraints 1

We give a review of recent progress on the application of the relativistic chiral SU (3) Lagrangian to meson-baryon scattering. It is shown that a combined chi-ral and 1/N c expansion of the Bethe-Salpeter interaction kernel leads to a good description of the kaon-nucleon, antikaon-nucleon and pion-nucleon scattering data typically up to laboratory momenta of p lab ≃ 500 MeV. We solve the covar...

متن کامل

ar X iv : h ep - p h / 03 06 06 3 v 1 6 J un 2 00 3 Poles of light resonances from unitarized Chiral perturbation Theory and their large N c behavior

We have recently completed the one loop calculation of meson-meson scattering within Chiral Perturbation Theory. Once unitarized, these amplitudes provide simultaneously a remarkable description of the resonance region up to 1.2 GeV as well as the low energy region, respecting the chiral symmetry expansion. The position of the poles in these amplitudes is related to the mass and width of the as...

متن کامل

Chiral Effective Lagrangian in the large - N c limit : the nonet case

Chiral Effective Lagrangian in the large-N c limit: the nonet case. Abstract A U L (3) ⊗ U R (3) low-energy effective lagrangian for the nonet of pseudogoldstone bosons that appear in the large N c limit of QCD is presented including terms up to four derivatives and explicit symmetry breaking terms up to quadratic in the quark masses. The one-loop renormalization of the couplings is worked out ...

متن کامل

Ipno/th 94-26 Chiral Symmetry Aspects of the Scalars

Electromagnetic decays of the scalar mesons are shown to be constrained by chiral symmetry as a consequence of the fact that, in the chiral limit, the two and threepoint functions< SS−PP > and< V V S > satisfy super-convergent dispersion relations. The QCD asymptotic behavior of the latter is canonical and it can be saturated by a finite number of resonances. The corresponding chiral lagrangian...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2002