As has long been known, it is energetically favorable for massive fermions to deform the homogeneous vacuum around them, giving rise to extended bag-like objects. We study this phenomenon non-perturbatively in a model field theory, the 1 + 1 dimensional Massive Gross-Neveu model, in the large N limit. We prove that the bags in this model are necessarily time dependent. We calculate their masses variationally and demonstrate their stability. We find a non-analytic behavior in these masses as we approach the standard massless Gross-Neveu model and argue that this behavior is caused by the kink-antikink threshold. This work extends our previous work to a non-integrable field theory.
|Number of pages||7|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - 9 Oct 1997|
Bibliographical noteFunding Information:
We are grateful to Mark Srednicki for indispensable help in carrying out the numerical work behind the figures. This work was partly supportedb y the National Science Foundation under Grant No. PHY89-04035.
ASJC Scopus subject areas
- Nuclear and High Energy Physics