  We propose a simple way to test the Abelian decomposition of QCD, the
existence of two types of gluons, experimentally at LHC. The Abelian
decomposition decomposes the gluons to the color neutral neurons and colored
chromons gauge independently. This refines the Feynman diagram in a way that
the color conservation is explicit, and generalizes the quark model to the
quark and chromon model. We predict that the neuron jet has the color factor
3/4 and has a sharpest jet radius and smallest particle multiplicity, while the
chromon jet with the color factor 9/4 remains the broadest jet. Moreover, the
neuron jet has a distinct color flow which forms an ideal color dipole, while
the quark and chromon jets have distorted dipole pattern.
