Author:

Keywords:

Science & Technology, Physical Sciences, Astronomy & Astrophysics, Physics, Particles & Fields, Physics, RENORMALIZATION, QCD, hep-th, 0201 Astronomical and Space Sciences, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, 0206 Quantum Physics, Nuclear & Particles Physics, 4902 Mathematical physics, 5101 Astronomical sciences, 5107 Particle and high energy physics

Abstract:

We introduce the 2-point-particle-irreducible expansion, which sums bubble graphs to all orders. We prove the renormalizibility of this summation. We use it on the Gross-Neveu model to calculate the mass gap and vacuum energy. After an optimization of the expansion, the final results are qualitatively good. © 2003 The American Physical Society.