ar X iv : h ep - p h / 92 11 22 0 v 1 6 N ov 1 99 2 Critical Temperature for the λ ( φ 4 ) 4 Within the δ - Expansion
نویسنده
چکیده
We apply the δ-expansion perturbation scheme to the λφ4 self-interacting scalar field theory in 3+1 D at finite temperature. In the δ-expansion the interaction term is written as λ(φ2)1+δ and δ is considered as the perturbation parameter. We compute, in this perturbation approach, the renormalized mass at finite temperature from which we get the critical temperature. The results are compared with the usual loop-expansion at finite temperature. PACS number(s): 11.15.Tk, 05.70.Fh, 64.60.-i .
منابع مشابه
ar X iv : h ep - e x / 97 11 01 6 v 1 2 1 N ov 1 99 7 Results on Λ 0 Production at HERMES
The production of Λ 0 's at the HERMES experiment is presented. Prospects for the future of Λ measurements at HERMES are discussed.
متن کاملar X iv : h ep - p h / 92 11 23 8 v 1 1 1 N ov 1 99 2 Properties of perturbative multi - particle amplitudes in φ k and O ( N ) theories
متن کامل
ar X iv : h ep - t h / 92 11 12 4 v 1 2 6 N ov 1 99 2 Chiral Symmetry Breaking with the Curtis - Pennington Vertex
We study chiral symmetry breaking in quenched QED 4 , using a vertex Ansatz recently proposed by Curtis and Pennington. Bifurcation analysis is employed to establish the existence of a critical coupling and to estimate its value. The main results are in qualitative agreement with the ladder approximation, the numerical changes being minor.
متن کاملar X iv : h ep - p h / 92 11 30 6 v 1 2 5 N ov 1 99 2 QCD RESULTS FOR NUCLEON COMPTON SCATTERING
We present QCD results for the exclusive processes γN → γN (N = p, n) at large momentum transfer and compare them to data for the proton.
متن کاملar X iv : h ep - p h / 97 11 22 6 v 1 4 N ov 1 99 7 Instantons and Polarized Structure Functions
The contribution of the quark-quark and quark-gluon interaction induced by instantons to the valence quark and proton spin-dependent structure functions g 1 (x, Q 2) is estimated within the instanton liquid model for QCD vacuum. It is shown, that this interaction leads to a rather large violation of the Ellis-Jaffe sum rule.
متن کامل