On dynamical gluon mass generation

Details On dynamical gluon mass generation On dynamical gluon mass generation

2007-04-18

arxiv.org/abs/0704.2308v1

Eur.Phys.J.A31:742-745,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Special Article - QNP2006: 4th International Conference on Quarks and Nuclear Physics, Madrid, Spain, 5-10 June 2006

Scientific paper

10.1140/epja/i2006-10281-7

The effective gluon propagator constructed with the pinch technique is governed by a Schwinger-Dyson equation with special structure and gauge properties, that can be deduced from the correspondence with the background field method. Most importantly the non-perturbative gluon self-energy is transverse order-by-order in the dressed loop expansion, and separately for gluonic and ghost contributions, a property which allows for a meanigfull truncation. A linearized version of the truncated Schwinger-Dyson equation is derived, using a vertex that satisfies the required Ward identity and contains massless poles. The resulting integral equation, subject to a properly regularized constraint, is solved numerically, and the main features of the solutions are briefly discussed.

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