COMPOSITENESS CONDITION IN THE NAMBU-JONA-LASINIO MODEL a
نویسنده
چکیده
The Nambu-Jona-Lasinio model is the special case of the renormalized Yukawa model with the compositeness condition. We use it to calculate the effective coupling constants in terms of the compositeness sale (momentum cut off) at the next-to-leading order in 1/N . The next-to-leading correction is too large in the model of scalar composite, while that in the induced gauge theory is reasonably suppressed due to the gauge cancellation of the leading divergences.
منابع مشابه
Nambu - Jona - Lasinio Model at the Next - to - Leading Order in 1 / N 1
We derived and solved the compositeness condition in the Nambu-Jona-Lasinio model at the next-to-leading order in 1/N , and obtained the expressions for the effective coupling constants in terms of the compositeness scale. In the NJL model with a scalar composite, the next to leading contributions are too large for N = 3. In the induced gauge theory with abelian gauge symmetry, the correction t...
متن کاملCompositeness condition at the next-to-leading order in the Nambu-Jona-Lasinio model.
We investigate the compositeness condition in four dimensions at the nontrivial order (next-to-leading order in 1/N with the number N of the colors), taking the Nambu-Jona-Lasinio model as an example. In spite of its nonrenormalizability, the compositeness condition can be successfully derived and solved in compact forms. The resultant problems are discussed. Typeset using REVTEX 1 Compositenes...
متن کاملPartially composite 2-Higgs doublet model
In the extra dimensional scenarios with gauge fields in the bulk, the KaluzaKlein (KK) gauge bosons can induce Nambu-Jona-Lasinio (NJL) type attractive fourfermion interactions, which can break electroweak symmetry dynamically with accompanying composite Higgs fields. We consider a possibility that electroweak symmetry breaking (EWSB) is triggered by both a fundamental Higgs and a composite Hig...
متن کاملOctet Magnetic Moments with Null Instantons and Semibosonized Nambu-Jona-Lasinio Model
It is shown that the difference between the magnetic moment results in the quark model with null instantons and semibosonized Nambu-Jona-Lasinio model lies in the description of the magnetic moment of the Λ-hyperon.
متن کاملA ug 2 00 9 Quadrupole polarizabilities of the pion in the Nambu – Jona - Lasinio model ⋆
The electromagnetic dipole and quadrupole polarizabilities of the neutral and charged pions are calculated in the Nambu–Jona-Lasinio model. Our results agree with the recent experimental analysis of these quantities based on Dispersion Sum Rules. Comparison is made with the results from the Chiral Perturbation Theory.
متن کامل