TY  - JOUR
AU  - Aguilar, A. C.
AU  - Binosi, D.
AU  - Papavassiliou, J.
PY  - 2012
DA  - 2012//
TI  - Gluon mass through ghost synergy
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 050
EP  - 32pp
VL  - 01
IS  - 1
PB  - Springer
KW  - Nonperturbative Effects
KW  - QCD
AB  - In this work we compute, at the "one-loop-dressed" level, the nonperturbative contribution of the ghost loops to the self-energy of the gluon propagator, in the Landau gauge. This is accomplished within the PT-BFM formalism, where the contribution of the ghost-loops is inherently transverse, by virtue of the QED-like Ward identities satisfied in this framework. At the level of the "one-loop dressed" approximation, the ghost transversality is preserved by employing a suitable gauge-technique Ansatz for the longitudinal part of the full ghost-gluon vertex. Under the key assumption that the undetermined transverse part of this vertex is numerically subleading in the infrared, and using as nonperturbative input the available lattice data for the ghost dressing function, we show that the ghost contributions have a rather sizable effect on the overall shape of the gluon propagator, both for d = 3, 4. Then, by exploiting a recently introduced dynamical equation for the effective gluon mass, whose solutions depend crucially on the characteristics of the gluon propagator at intermediate energies, we show that if the ghost loops are removed from the gluon propagator then the gluon mass vanishes. These findings suggest that, at least at the level of the Schwinger-Dyson equations, the effects of gluons and ghosts are inextricably connected, and must be combined suitably in order to reproduce the results obtained in the recent lattice simulations.
SN  - 1126-6708
UR  - http://arxiv.org/abs/1108.5989
UR  - https://doi.org/10.1007/JHEP01(2012)050
DO  - 10.1007/JHEP01(2012)050
LA  - English
N1  - WOS:000300181800050
ID  - Aguilar_etal2012
ER  -