Pion properties in the 1/Nc-corrected NJL model
نویسندگان
چکیده
منابع مشابه
Pion Properties in the 1 / N c - corrected NJL model
We investigate the effect of mesonic fluctuations on the pion propagator in the Nambu–Jona-Lasinio (NJL) model by explicitly taking into account 1/N c-corrections. Because of the non-renormalizability of the model we have to regularize the meson loops with an independent cutoff parameter Λ M. Whereas for moderate values of Λ M the properties of the pion change only quantitatively we encounter s...
متن کاملMeson Properties in the 1 / N c - corrected NJL model
Properties of mesons are investigated within the Nambu–Jona-Lasinio model. We include meson-loop corrections, which are generated via a systematic 1/N c-expansion in next-to-leading order. We show that our scheme is consistent with chiral symmetry, in particular with the Goldstone theorem and the Gell-Mann Oakes Renner relation. The numerical part focuses on the pion and the ρ-meson sector. For...
متن کاملNjl Model on the Light Cone and Pion Structure Function *
The NJL model is formulated on the light cone. Using the 1/N expansion to solve the fermionic constraint, an effective 4-fermi la-grangian is derived. Pionic properties are investigated using this la-grangian, and the formal equivalence to the equal-time formulation is demonstrated. Two regularization schemes in terms of light-cone variables are discussed: An extension of the 'invariant mass cu...
متن کاملParton Distributions Functions of Pion, Kaon and Eta pseudoscalar mesons in the NJL model
Parton distributions of pseudoscalar π,K and η mesons obtained within the NJL model using the Pauli-Villars regularization method are analyzed in terms of LO and NLO evolution, and the valence sea quark and gluon parton distributions for the pion are obtained at Q2 = 4GeV and compared to existing parametrizations at that scale. Surprisingly, the NLO order effects turn out to be small compared t...
متن کاملPion condensation in a two-flavor NJL model: the role of charge neutrality
We study pion condensation and the phase structure in a two-flavor Nambu-Jona-Lasinio model in the presence of baryon chemical potential μ and isospin chemical potential μI at zero and finite temperature. There is a competition between the chiral condensate and a Bose-Einstein condensate of charged pions. In the chiral limit, the chiral condensate vanishes for any finite value of the isospin ch...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Letters B
سال: 2000
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(00)00215-x